only log message if response is appended

Closes: https://github.com/kevin1024/vcrpy/issues/685

.editorconfig

@@ -0,0 +1,14 @@
+root = true
+
+[*]
+indent_style = space
+indent_size = 4
+charset = utf-8
+trim_trailing_whitespace = true
+insert_final_newline = true
+
+[Makefile]
+indent_style = tab
+
+[*.{yml,yaml}]
+indent_size = 2

.github/workflows/codespell.yml

@@ -0,0 +1,22 @@
+---
+name: Codespell
+
+on:
+  push:
+    branches: [master]
+  pull_request:
+    branches: [master]
+
+permissions:
+  contents: read
+
+jobs:
+  codespell:
+    name: Check for spelling errors
+    runs-on: ubuntu-24.04
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v5
+      - name: Codespell
+        uses: codespell-project/actions-codespell@v2

.github/workflows/docs.yml

@@ -0,0 +1,23 @@
+name: Validate docs
+
+on:
+  push:
+    paths:
+      - 'docs/**'
+
+jobs:
+  validate:
+    runs-on: ubuntu-24.04
+
+    steps:
+      - uses: actions/checkout@v5
+      - uses: actions/setup-python@v6
+        with:
+          python-version: "3.12"
+
+      - name: Install build dependencies
+        run: pip install -r docs/requirements.txt
+      - name: Rendering HTML documentation
+        run: sphinx-build -b html docs/ html
+      - name: Inspect html rendered
+        run: cat html/index.html

.github/workflows/main.yml

@@ -5,36 +5,57 @@ on:
     branches:
       - master
   pull_request:
-    branches:
-      - "*"
+  schedule:
+    - cron: "0 16 * * 5" # Every Friday 4pm
+  workflow_dispatch:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-24.04
     strategy:
+      fail-fast: false
       matrix:
-        python-version: ["3.7", "3.8", "3.9", "3.10", "pypy-3.8"]
+        python-version:
+          - "3.10"
+          - "3.11"
+          - "3.12"
+          - "3.13"
+          - "pypy-3.11"
 
     steps:
-      - name: Install libgnutls28-dev
-        run: |
-          sudo apt update -q
-          sudo apt install -q -y libgnutls28-dev libcurl4-gnutls-dev
-
-      - uses: actions/checkout@v3.0.2
+      - uses: actions/checkout@v5
+      - name: Install uv
+        uses: astral-sh/setup-uv@v7
 
       - name: Set up Python ${{ matrix.python-version }}
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v6
         with:
           python-version: ${{ matrix.python-version }}
+          allow-prereleases: true
 
       - name: Install project dependencies
         run: |
-          pip install --upgrade pip
-          pip install codecov tox tox-gh-actions
+          uv pip install --system --upgrade pip setuptools
+          uv pip install --system codecov '.[tests]'
+          uv pip check
 
-      - name: Run tests with tox
-        run: tox
+      - name: Allow creation of user namespaces (e.g. to the unshare command)
+        run: |
+          # .. so that we don't get error:
+          # unshare: write failed /proc/self/uid_map: Operation not permitted
+          # Idea from https://github.com/YoYoGames/GameMaker-Bugs/issues/6015#issuecomment-2135552784 .
+          sudo sysctl kernel.apparmor_restrict_unprivileged_userns=0
+
+      - name: Run online tests
+        run: ./runtests.sh --cov=./vcr --cov-branch --cov-report=xml --cov-append -m online
+
+      - name: Run offline tests with no access to the Internet
+        run: |
+          # We're using unshare to take Internet access
+          # away so that we'll notice whenever some new test
+          # is missing @pytest.mark.online decoration in the future
+          unshare --map-root-user --net -- \
+              sh -c 'ip link set lo up; ./runtests.sh --cov=./vcr --cov-branch --cov-report=xml --cov-append -m "not online"'
 
       - name: Run coverage
         run: codecov

.github/workflows/pre-commit-detect-outdated.yml

@@ -0,0 +1,62 @@
+# Copyright (c) 2023 Sebastian Pipping <sebastian@pipping.org>
+# Licensed under the MIT license
+
+name: Detect outdated pre-commit hooks
+
+on:
+  schedule:
+    - cron: '0 16 * * 5'  # Every Friday 4pm
+
+# NOTE: This will drop all permissions from GITHUB_TOKEN except metadata read,
+#       and then (re)add the ones listed below:
+permissions:
+  contents: write
+  pull-requests: write
+
+jobs:
+  pre_commit_detect_outdated:
+    name: Detect outdated pre-commit hooks
+    runs-on: ubuntu-24.04
+    steps:
+      - uses: actions/checkout@v5
+
+      - name: Set up Python 3.12
+        uses: actions/setup-python@v6
+        with:
+          python-version: 3.12
+
+      - name: Install pre-commit
+        run: |-
+          pip install \
+            --disable-pip-version-check \
+            --no-warn-script-location \
+            --user \
+            pre-commit
+          echo "PATH=${HOME}/.local/bin:${PATH}" >> "${GITHUB_ENV}"
+
+      - name: Check for outdated hooks
+        run: |-
+          pre-commit autoupdate
+          git diff -- .pre-commit-config.yaml
+
+      - name: Create pull request from changes (if any)
+        id: create-pull-request
+        uses: peter-evans/create-pull-request@v7
+        with:
+          author: 'pre-commit <pre-commit@tools.invalid>'
+          base: master
+          body: |-
+            For your consideration.
+
+            :warning: Please **CLOSE AND RE-OPEN** this pull request so that [further workflow runs get triggered](https://github.com/peter-evans/create-pull-request/blob/main/docs/concepts-guidelines.md#triggering-further-workflow-runs) for this pull request.
+          branch: precommit-autoupdate
+          commit-message: "pre-commit: Autoupdate"
+          delete-branch: true
+          draft: true
+          labels: enhancement
+          title: "pre-commit: Autoupdate"
+
+      - name: Log pull request URL
+        if: "${{ steps.create-pull-request.outputs.pull-request-url }}"
+        run: |
+          echo "Pull request URL is: ${{ steps.create-pull-request.outputs.pull-request-url }}"

.github/workflows/pre-commit.yml

@@ -0,0 +1,20 @@
+# Copyright (c) 2023 Sebastian Pipping <sebastian@pipping.org>
+# Licensed under the MIT license
+
+name: Run pre-commit
+
+on:
+- pull_request
+- push
+- workflow_dispatch
+
+jobs:
+  pre-commit:
+    name: Run pre-commit
+    runs-on: ubuntu-24.04
+    steps:
+    - uses: actions/checkout@v5
+    - uses: actions/setup-python@v6
+      with:
+        python-version: 3.12
+    - uses: pre-commit/action@v3.0.1

.pre-commit-config.yaml

@@ -0,0 +1,17 @@
+# Copyright (c) 2023 Sebastian Pipping <sebastian@pipping.org>
+# Licensed under the MIT license
+
+repos:
+  - repo: https://github.com/astral-sh/ruff-pre-commit
+    rev: v0.14.5
+    hooks:
+      - id: ruff
+        args: ["--output-format=full"]
+      - id: ruff-format
+
+  - repo: https://github.com/pre-commit/pre-commit-hooks
+    rev: v5.0.0
+    hooks:
+      - id: check-merge-conflict
+      - id: end-of-file-fixer
+      - id: trailing-whitespace

.readthedocs.yaml

@@ -0,0 +1,24 @@
+# .readthedocs.yaml
+# Read the Docs configuration file
+# See https://docs.readthedocs.io/en/stable/config-file/v2.html for details
+
+# Required
+version: 2
+
+# Set the version of Python and other tools you might need
+build:
+  os: ubuntu-24.04
+  tools:
+    python: "3.12"
+
+# Build documentation in the docs/ directory with Sphinx
+sphinx:
+  configuration: docs/conf.py
+
+# We recommend specifying your dependencies to enable reproducible builds:
+# https://docs.readthedocs.io/en/stable/guides/reproducible-builds.html
+python:
+  install:
+  - requirements: docs/requirements.txt
+  - method: pip
+    path: .

MANIFEST.in

@@ -1,6 +1,5 @@
 include README.rst
 include LICENSE.txt
-include tox.ini
 recursive-include tests *
 recursive-exclude * __pycache__
 recursive-exclude * *.py[co]

README.rst

@@ -4,7 +4,7 @@ VCR.py 📼
 ###########
 
 
-|PyPI| |Python versions| |Build Status| |CodeCov| |Gitter| |CodeStyleBlack|
+|PyPI| |Python versions| |Build Status| |CodeCov| |Gitter|
 
 ----
 
@@ -70,6 +70,3 @@ more details
 .. |CodeCov| image:: https://codecov.io/gh/kevin1024/vcrpy/branch/master/graph/badge.svg
    :target: https://codecov.io/gh/kevin1024/vcrpy
    :alt: Code Coverage Status
-.. |CodeStyleBlack| image:: https://img.shields.io/badge/code%20style-black-000000.svg 
-   :target: https://github.com/psf/black
-   :alt: Code Style: black

docs/advanced.rst

@@ -71,7 +71,7 @@ Finally, register your class with VCR to use your new serializer.
 
     import vcr
 
-    class BogoSerializer(object):
+    class BogoSerializer:
         """
         Must implement serialize() and deserialize() methods
         """
@@ -136,7 +136,8 @@ Create your own persistence class, see the example below:
 
 Your custom persister must implement both ``load_cassette`` and ``save_cassette``
 methods.  The ``load_cassette`` method must return a deserialized cassette or raise
-``ValueError`` if no cassette is found.
+either ``CassetteNotFoundError`` if no cassette is found, or ``CassetteDecodeError``
+if the cassette cannot be successfully deserialized.
 
 Once the persister class is defined, register with VCR like so...
 
@@ -188,7 +189,7 @@ of post data parameters to filter.
 
 .. code:: python
 
-    with my_vcr.use_cassette('test.yml', filter_post_data_parameters=['client_secret']):
+    with my_vcr.use_cassette('test.yml', filter_post_data_parameters=['api_key']):
         requests.post('http://api.com/postdata', data={'api_key': 'secretstring'})
 
 Advanced use of filter_headers, filter_query_parameters and filter_post_data_parameters
@@ -404,3 +405,38 @@ the Cassette ``allow_playback_repeats`` option.
         for x in range(10):
             response = urllib2.urlopen('http://www.zombo.com/').read()
         assert cass.all_played
+
+Discards Cassette on Errors
+---------------------------
+
+By default VCR will save the cassette file even when there is any error inside
+the enclosing context/test.
+
+If you want to save the cassette only when the test succeeds, set the Cassette
+``record_on_exception`` option to ``False``.
+
+.. code:: python
+
+    try:
+        my_vcr = VCR(record_on_exception=False)
+        with my_vcr.use_cassette('fixtures/vcr_cassettes/synopsis.yaml') as cass:
+            response = urllib2.urlopen('http://www.zombo.com/').read()
+            raise RuntimeError("Oops, something happened")
+    except RuntimeError:
+        pass
+
+    # Since there was an exception, the cassette file hasn't been created.
+    assert not os.path.exists('fixtures/vcr_cassettes/synopsis.yaml')
+
+Drop unused requests
+--------------------
+
+Even if any HTTP request is changed or removed from tests, previously recorded
+interactions remain in the cassette file.  If set the ``drop_unused_requests``
+option to ``True``, VCR will not save old HTTP interactions if they are not used.
+
+.. code:: python
+
+    my_vcr = VCR(drop_unused_requests=True)
+    with my_vcr.use_cassette('fixtures/vcr_cassettes/synopsis.yaml'):
+        ...  # your HTTP interactions here

docs/changelog.rst

@@ -7,6 +7,73 @@ For a full list of triaged issues, bugs and PRs and what release they are target
 
 All help in providing PRs to close out bug issues is appreciated. Even if that is providing a repo that fully replicates issues. We have very generous contributors that have added these to bug issues which meant another contributor picked up the bug and closed it out.
 
+- Unreleased
+    - Drop support for Python 3.9
+    - Drop support for urllib3 < 2
+
+-  7.0.0
+    - Drop support for python 3.8 (major version bump) - thanks @jairhenrique
+    - Various linting and test fixes - thanks @jairhenrique
+    - Bugfix for urllib2>=2.3.0 - missing version_string (#888)
+    - Bugfix for asyncio.run - thanks @alekeik1
+-  6.0.2
+    - Ensure body is consumed only once (#846) - thanks @sathieu
+    - Permit urllib3 2.x for non-PyPy Python >=3.10
+    - Fix typos in test commands - thanks @chuckwondo
+    - Several test and workflow improvements - thanks @hartwork and @graingert
+-  6.0.1
+    - Bugfix with to Tornado cassette generator (thanks @graingert)
+-  6.0.0
+    - BREAKING: Fix issue with httpx support (thanks @parkerhancock) in #784. NOTE: You may have to recreate some of your cassettes produced in previous releases due to the binary format being saved incorrectly in previous releases
+    - BREAKING: Drop support for `boto` (vcrpy still supports boto3, but is dropping the deprecated `boto` support in this release. (thanks @jairhenrique)
+    - Fix compatibility issue with Python 3.12 (thanks @hartwork)
+    - Drop simplejson (fixes some compatibility issues) (thanks @jairhenrique)
+    - Run CI on Python 3.12 and PyPy 3.9-3.10 (thanks @mgorny)
+    - Various linting and docs improvements (thanks @jairhenrique)
+    - Tornado fixes (thanks @graingert)
+-  5.1.0
+    - Use ruff for linting (instead of current flake8/isort/pyflakes) - thanks @jairhenrique
+    - Enable rule B (flake8-bugbear) on ruff - thanks @jairhenrique
+    - Configure read the docs V2 - thanks @jairhenrique
+    - Fix typo in docs - thanks @quasimik
+    - Make json.loads of Python >=3.6 decode bytes by itself - thanks @hartwork
+    - Fix body matcher for chunked requests (fixes #734) - thanks @hartwork
+    - Fix query param filter for aiohttp (fixes #517) - thanks @hartwork and @salomvary
+    - Remove unnecessary dependency on six. - thanks @charettes
+    - build(deps): update sphinx requirement from <7 to <8 - thanks @jairhenrique
+    - Add action to validate docs - thanks @jairhenrique
+    - Add editorconfig file - thanks @jairhenrique
+    - Drop iscoroutinefunction fallback function for unsupported python thanks @jairhenrique
+-  5.0.0
+    - BREAKING CHANGE: Drop support for Python 3.7.  3.7 is EOL as of 6/27/23 Thanks @jairhenrique
+    - BREAKING CHANGE: Custom Cassette persisters no longer catch ValueError.  If you have implemented a custom persister (has anyone implemented a custom persister?  Let us know!) then you will need to throw a CassetteNotFoundError when unable to find a cassette.  See #681 for discussion and reason for this change. Thanks @amosjyng for the PR and the review from @hartwork
+
+-  4.4.0
+    - HUGE thanks to @hartwork for all the work done on this release!
+    - Bring vcr/unittest in to vcrpy as a full feature of vcr instead of a separate library.  Big thanks to @hartwork for doing this and to @agriffis for originally creating the library
+    - Make decompression robust towards already decompressed input (thanks @hartwork)
+    - Bugfix: Add read1 method (fixes compatibility with biopython), thanks @mghantous
+    - Bugfix: Prevent filters from corrupting request (thanks @abramclark)
+    - Bugfix: Add support for `response.raw.stream()` to fix urllib v2 compat
+    - Bugfix: Replace `assert` with `raise AssertionError`: fixes support for `PYTHONOPTIMIZE=1`
+    - Add pytest.mark.online to run test suite offline, thanks @jspricke
+    - use python3 and pip3 binaries to ease debian packaging (thanks @hartwork)
+    - Add codespell (thanks @mghantous)
+-  4.3.1
+    - Support urllib3 v1 and v2.  NOTE: there is an issue running urllib3 v2 on
+      Python older than 3.10, so this is currently blocked in the requirements.
+      Hopefully we can resolve this situation in the future.  Thanks to @shifqu,
+      hartwork, jairhenrique, pquentin, and vEpiphyte for your work on this.
+-  4.3.0
+    - Add support for Python 3.11 (Thanks @evgeni)
+    - Drop support for botocore <1.11.0 and requests <2.16.2 (thanks @hartwork)
+    - Bugfix: decode_compressed_response raises exception on empty responses. Thanks @CharString
+    - Don't save requests from decorated tests if decorated test fails (thanks @dan-passaro)
+    - Fix not calling all the exit stack when record_on_exception is False (thanks @Terseus)
+    - Various CI, documentation, testing, and formatting improvements (Thanks @jairhenrique, @dan-passaro, @hartwork, and Terseus)
+-  4.2.1
+    - Fix a bug where the first request in a redirect chain was not being recorded with aiohttp
+    - Various typos and small fixes, thanks @jairhenrique, @timgates42
 -  4.2.0
     - Drop support for python < 3.7, thanks @jairhenrique, @IvanMalison, @AthulMuralidhar
     - Various aiohtt bigfixes (thanks @pauloromeira and boechat107)
@@ -244,4 +311,3 @@ All help in providing PRs to close out bug issues is appreciated. Even if that i
     - Add support for requests / urllib3
 -  0.0.1
     - Initial Release
-

docs/conf.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 #
 # vcrpy documentation build configuration file, created by
 # sphinx-quickstart on Sun Sep 13 11:18:00 2015.
@@ -94,7 +93,7 @@ version = release = find_version("..", "vcr", "__init__.py")
 #
 # This is also used if you do content translation via gettext catalogs.
 # Usually you set "language" from the command line for these cases.
-language = None
+language = "en"
 
 # There are two options for replacing |today|: either, you set today to some
 # non-false value, then it is used:
@@ -317,5 +316,5 @@ texinfo_documents = [
 
 
 # Example configuration for intersphinx: refer to the Python standard library.
-intersphinx_mapping = {"https://docs.python.org/": None}
+intersphinx_mapping = {"python": ("https://docs.python.org/3", None)}
 html_theme = "alabaster"

docs/configuration.rst

@@ -42,7 +42,8 @@ This can be configured by changing the ``match_on`` setting.
 The following options are available :
 
 -  method (for example, POST or GET)
--  uri (the full URI.)
+-  uri (the full URI)
+-  scheme (for example, HTTP or HTTPS)
 -  host (the hostname of the server receiving the request)
 -  port (the port of the server receiving the request)
 -  path (the path of the request)

docs/contributing.rst

@@ -74,7 +74,7 @@ The PR reviewer is a second set of eyes to see if:
 **Release Manager:**
  - Ensure CI is passing.
  - Create a release on github and tag it with the changelog release notes.
- - ``python setup.py build sdist bdist_wheel``
+ - ``python3 setup.py build sdist bdist_wheel``
  - ``twine upload dist/*``
  - Go to ReadTheDocs build page and trigger a build https://readthedocs.org/projects/vcrpy/builds/
 
@@ -83,39 +83,21 @@ The PR reviewer is a second set of eyes to see if:
 Running VCR's test suite
 ------------------------
 
-The tests are all run automatically on `Travis
-CI <https://travis-ci.org/kevin1024/vcrpy>`__, but you can also run them
-yourself using `pytest <http://pytest.org/>`__ and
-`Tox <http://tox.testrun.org/>`__. 
+The tests are all run automatically on `Github Actions CI <https://github.com/kevin1024/vcrpy/actions>`__,
+but you can also run them yourself using `pytest <http://pytest.org/>`__.
 
-Tox will automatically run them in all environments VCR.py supports if they are available on your `PATH`. Alternatively you can use `tox-pyenv <https://pypi.org/project/tox-pyenv/>`_ with 
-`pyenv <https://github.com/pyenv/pyenv>`_. 
-We recommend you read the documentation for each and see the section further below.
-
-The test suite is pretty big and slow, but you can tell tox to only run specific tests like this::
-
-    tox -e {pyNN}-{HTTP_LIBRARY} -- <pytest flags passed through>
-
-    tox -e py37-requests -- -v -k "'test_status_code or test_gzip'"
-    tox -e py37-requests -- -v --last-failed
-
-This will run only tests that look like ``test_status_code`` or
-``test_gzip`` in the test suite, and only in the python 3.7 environment
-that has ``requests`` installed.
-
-Also, in order for the boto tests to run, you will need an AWS key.
-Refer to the `boto
-documentation <https://boto.readthedocs.io/en/latest/getting_started.html>`__
-for how to set this up. I have marked the boto tests as optional in
+In order for the boto3 tests to run, you will need an AWS key.
+Refer to the `boto3
+documentation <https://boto3.amazonaws.com/v1/documentation/api/latest/reference/services/index.html>`__
+for how to set this up. I have marked the boto3 tests as optional in
 Travis so you don't have to worry about them failing if you submit a
 pull request.
 
-Using PyEnv with VCR's test suite
+Using Pyenv with VCR's test suite
 ---------------------------------
 
-PyEnv is a tool for managing multiple installation of python on your system.
+Pyenv is a tool for managing multiple installation of python on your system.
 See the full documentation at their `github <https://github.com/pyenv/pyenv>`_
-but we are also going to use `tox-pyenv <https://pypi.org/project/tox-pyenv/>`_ 
 in this example::
 
     git clone https://github.com/pyenv/pyenv ~/.pyenv
@@ -126,27 +108,21 @@ in this example::
     # Setup shim paths
     eval "$(pyenv init -)"
 
-    # Setup your local system tox tooling
-    pip install tox tox-pyenv
-
     # Install supported versions (at time of writing), this does not activate them
-    pyenv install 3.7.5 3.8.0 pypy3.8
+    pyenv install 3.12.0 pypy3.10
 
     # This activates them
-    pyenv local 3.7.5 3.8.0 pypy3.8
+    pyenv local 3.12.0 pypy3.10
 
     # Run the whole test suite
-    tox
-
-    # Run the whole test suite or just part of it
-    tox -e lint
-    tox -e py37-requests
+    pip install .[tests]
+    ./runtests.sh
 
 
 Troubleshooting on MacOSX
 -------------------------
 
-If you have this kind of error when running tox :
+If you have this kind of error when running tests :
 
 .. code:: python
 

docs/installation.rst

@@ -4,25 +4,25 @@ Installation
 VCR.py is a package on `PyPI <https://pypi.python.org>`__, so you can install
 with pip::
 
-    pip install vcrpy
+    pip3 install vcrpy
 
 Compatibility
 -------------
 
-VCR.py supports Python 3.7+, and `pypy <http://pypy.org>`__.
+VCR.py supports Python 3.9+, and `pypy <http://pypy.org>`__.
 
 The following HTTP libraries are supported:
 
 -  ``aiohttp``
--  ``boto``
 -  ``boto3``
 -  ``http.client``
 -  ``httplib2``
--  ``requests`` (both 1.x and 2.x versions)
+-  ``requests`` (>=2.16.2 versions)
 -  ``tornado.httpclient``
 -  ``urllib2``
 -  ``urllib3``
 -  ``httpx``
+-  ``httpcore``
 
 Speed
 -----
@@ -35,7 +35,7 @@ rebuilding pyyaml.
 
 1. Test if pyyaml is built with libyaml. This should work::
 
-     python -c 'from yaml import CLoader'
+     python3 -c 'from yaml import CLoader'
 
 2. Install libyaml according to your Linux distribution, or using `Homebrew
    <http://mxcl.github.com/homebrew/>`__ on Mac::
@@ -46,8 +46,8 @@ rebuilding pyyaml.
 
 3. Rebuild pyyaml with libyaml::
 
-     pip uninstall pyyaml
-     pip --no-cache-dir install pyyaml
+     pip3 uninstall pyyaml
+     pip3 --no-cache-dir install pyyaml
 
 Upgrade
 -------
@@ -61,7 +61,7 @@ is to simply delete your cassettes and re-record all of them. VCR.py
 also provides a migration script that attempts to upgrade your 0.x
 cassettes to the new 1.x format. To use it, run the following command::
 
-    python -m vcr.migration PATH
+    python3 -m vcr.migration PATH
 
 The PATH can be either a path to the directory with cassettes or the
 path to a single cassette.

docs/requirements.txt

@@ -0,0 +1,2 @@
+sphinx<9
+sphinx_rtd_theme==3.0.2

docs/usage.rst

@@ -4,11 +4,11 @@ Usage
 .. code:: python
 
     import vcr
-    import urllib
+    import urllib.request
 
     with vcr.use_cassette('fixtures/vcr_cassettes/synopsis.yaml'):
         response = urllib.request.urlopen('http://www.iana.org/domains/reserved').read()
-        assert 'Example domains' in response
+        assert b'Example domains' in response
 
 Run this test once, and VCR.py will record the HTTP request to
 ``fixtures/vcr_cassettes/synopsis.yaml``. Run it again, and VCR.py will
@@ -26,7 +26,7 @@ look like this:
     @vcr.use_cassette('fixtures/vcr_cassettes/synopsis.yaml')
     def test_iana():
         response = urllib.request.urlopen('http://www.iana.org/domains/reserved').read()
-        assert 'Example domains' in response
+        assert b'Example domains' in response
 
 When using the decorator version of ``use_cassette``, it is possible to
 omit the path to the cassette file.
@@ -36,7 +36,7 @@ omit the path to the cassette file.
     @vcr.use_cassette()
     def test_iana():
         response = urllib.request.urlopen('http://www.iana.org/domains/reserved').read()
-        assert 'Example domains' in response
+        assert b'Example domains' in response
 
 In this case, the cassette file will be given the same name as the test
 function, and it will be placed in the same directory as the file in
@@ -92,9 +92,73 @@ all
 Unittest Integration
 --------------------
 
-While it's possible to use the context manager or decorator forms with unittest,
-there's also a ``VCRTestCase`` provided separately by `vcrpy-unittest
-<https://github.com/agriffis/vcrpy-unittest>`__.
+Inherit from ``VCRTestCase`` for automatic recording and playback of HTTP
+interactions.
+
+.. code:: python
+
+    from vcr.unittest import VCRTestCase
+    import requests
+
+    class MyTestCase(VCRTestCase):
+       def test_something(self):
+           response = requests.get('http://example.com')
+
+Similar to how VCR.py returns the cassette from the context manager,
+``VCRTestCase`` makes the cassette available as ``self.cassette``:
+
+.. code:: python
+
+    self.assertEqual(len(self.cassette), 1)
+    self.assertEqual(self.cassette.requests[0].uri, 'http://example.com')
+
+By default cassettes will be placed in the ``cassettes`` subdirectory next to the
+test, named according to the test class and method. For example, the above test
+would read from and write to ``cassettes/MyTestCase.test_something.yaml``
+
+The configuration can be modified by overriding methods on your subclass:
+``_get_vcr_kwargs``, ``_get_cassette_library_dir`` and ``_get_cassette_name``.
+To modify the ``VCR`` object after instantiation, for example to add a matcher,
+you can hook on ``_get_vcr``, for example:
+
+.. code:: python
+
+    class MyTestCase(VCRTestCase):
+        def _get_vcr(self, **kwargs):
+            myvcr = super(MyTestCase, self)._get_vcr(**kwargs)
+            myvcr.register_matcher('mymatcher', mymatcher)
+            myvcr.match_on = ['mymatcher']
+            return myvcr
+
+See
+`the source
+<https://github.com/kevin1024/vcrpy/blob/master/vcr/unittest.py>`__
+for the default implementations of these methods.
+
+If you implement a ``setUp`` method on your test class then make sure to call
+the parent version ``super().setUp()`` in your own in order to continue getting
+the cassettes produced.
+
+VCRMixin
+~~~~~~~~
+
+In case inheriting from ``VCRTestCase`` is difficult because of an existing
+class hierarchy containing tests in the base classes, inherit from ``VCRMixin``
+instead.
+
+.. code:: python
+
+    from vcr.unittest import VCRMixin
+    import requests
+    import unittest
+
+    class MyTestMixin(VCRMixin):
+       def test_something(self):
+           response = requests.get(self.url)
+
+    class MyTestCase(MyTestMixin, unittest.TestCase):
+        url = 'http://example.com'
+
 
 Pytest Integration
 ------------------

pyproject.toml

@@ -1,2 +1,32 @@
-[tool.black]
+[tool.codespell]
+skip = '.git,*.pdf,*.svg,.tox'
+ignore-regex = "\\\\[fnrstv]"
+
+[tool.pytest]
+addopts = ["--strict-config", "--strict-markers"]
+asyncio_default_fixture_loop_scope = "session"
+asyncio_default_test_loop_scope = "session"
+markers = ["online"]
+
+[tool.ruff]
 line-length = 110
+target-version = "py310"
+
+[tool.ruff.lint]
+select = [
+    "B",   # flake8-bugbear
+    "C4",  # flake8-comprehensions
+    "COM", # flake8-commas
+    "E",   # pycodestyle error
+    "F",   # pyflakes
+    "I",   # isort
+    "ISC", # flake8-implicit-str-concat
+    "PIE", # flake8-pie
+    "RUF", # Ruff-specific rules
+    "UP",  # pyupgrade
+    "W",   # pycodestyle warning
+    "SIM",
+]
+
+[tool.ruff.lint.isort]
+known-first-party = ["vcr"]

runtests.sh

@@ -1,7 +1,5 @@
 #!/bin/bash
 
-# https://blog.ionelmc.ro/2015/04/14/tox-tricks-and-patterns/#when-it-inevitably-leads-to-shell-scripts
-# If you are getting an INVOCATION ERROR for this script then there is 
-# a good chance you are running on Windows.
-# You can and should use WSL for running tox on Windows when it calls bash scripts.
-REQUESTS_CA_BUNDLE=`python -m pytest_httpbin.certs` pytest $*
+# If you are getting an INVOCATION ERROR for this script then there is a good chance you are running on Windows.
+# You can and should use WSL for running tests on Windows when it calls bash scripts.
+REQUESTS_CA_BUNDLE=`python3 -m pytest_httpbin.certs` exec pytest "$@"

setup.py

@@ -3,12 +3,11 @@
 import codecs
 import os
 import re
-import sys
+from pathlib import Path
 
-from setuptools import setup, find_packages
-from setuptools.command.test import test as TestCommand
+from setuptools import find_packages, setup
 
-long_description = open("README.rst", "r").read()
+long_description = Path("README.rst").read_text()
 here = os.path.abspath(os.path.dirname(__file__))
 
 
@@ -28,27 +27,33 @@ def find_version(*file_paths):
     raise RuntimeError("Unable to find version string.")
 
 
-class PyTest(TestCommand):
-    def finalize_options(self):
-        TestCommand.finalize_options(self)
-        self.test_args = []
-        self.test_suite = True
-
-    def run_tests(self):
-        # import here, cause outside the eggs aren't loaded
-        import pytest
-
-        errno = pytest.main(self.test_args)
-        sys.exit(errno)
-
-
 install_requires = [
     "PyYAML",
     "wrapt",
-    "six>=1.5",
-    "yarl",
 ]
 
+extras_require = {
+    "tests": [
+        "aiohttp",
+        "boto3",
+        "cryptography",
+        "httpbin",
+        "httpcore",
+        "httplib2",
+        "httpx",
+        "pycurl; platform_python_implementation !='PyPy'",
+        "pytest",
+        "pytest-aiohttp",
+        "pytest-asyncio",
+        "pytest-cov",
+        "pytest-httpbin",
+        "requests>=2.22.0",
+        "tornado",
+        "urllib3",
+        "werkzeug==2.0.3",
+    ],
+}
+
 setup(
     name="vcrpy",
     version=find_version("vcr", "__init__.py"),
@@ -59,20 +64,21 @@ setup(
     author_email="me@kevinmccarthy.org",
     url="https://github.com/kevin1024/vcrpy",
     packages=find_packages(exclude=["tests*"]),
-    python_requires=">=3.7",
+    python_requires=">=3.10",
     install_requires=install_requires,
     license="MIT",
-    tests_require=["pytest", "mock", "pytest-httpbin"],
+    extras_require=extras_require,
+    tests_require=extras_require["tests"],
     classifiers=[
         "Development Status :: 5 - Production/Stable",
         "Environment :: Console",
         "Intended Audience :: Developers",
         "Programming Language :: Python",
         "Programming Language :: Python :: 3",
-        "Programming Language :: Python :: 3.7",
-        "Programming Language :: Python :: 3.8",
-        "Programming Language :: Python :: 3.9",
         "Programming Language :: Python :: 3.10",
+        "Programming Language :: Python :: 3.11",
+        "Programming Language :: Python :: 3.12",
+        "Programming Language :: Python :: 3.13",
         "Programming Language :: Python :: 3 :: Only",
         "Programming Language :: Python :: Implementation :: CPython",
         "Programming Language :: Python :: Implementation :: PyPy",

tests/assertions.py

@@ -11,9 +11,12 @@ def assert_cassette_has_one_response(cass):
     assert cass.play_count == 1
 
 
-def assert_is_json(a_string):
+def assert_is_json_bytes(b: bytes):
+    assert isinstance(b, bytes)
+
     try:
-        json.loads(a_string.decode("utf-8"))
-    except Exception:
-        assert False
+        json.loads(b)
+    except Exception as error:
+        raise AssertionError() from error
+
     assert True

tests/integration/aiohttp_utils.py

@@ -2,11 +2,10 @@
 import asyncio
 
 import aiohttp
-from aiohttp.test_utils import TestClient
 
 
 async def aiohttp_request(loop, method, url, output="text", encoding="utf-8", content_type=None, **kwargs):
-    session = aiohttp.ClientSession(loop=loop)
+    async with aiohttp.ClientSession(loop=loop) as session:
         response_ctx = session.request(method, url, **kwargs)
 
         response = await response_ctx.__aenter__()

tests/integration/cassettes/gzip_httpx_old_format.yaml

@@ -0,0 +1,41 @@
+interactions:
+- request:
+    body: ''
+    headers:
+      accept:
+      - '*/*'
+      accept-encoding:
+      - gzip, deflate, br
+      connection:
+      - keep-alive
+      host:
+      - httpbin.org
+      user-agent:
+      - python-httpx/0.23.0
+    method: GET
+    uri: https://httpbin.org/gzip
+  response:
+    content: "{\n  \"gzipped\": true, \n  \"headers\": {\n    \"Accept\": \"*/*\",
+      \n    \"Accept-Encoding\": \"gzip, deflate, br\", \n    \"Host\": \"httpbin.org\",
+      \n    \"User-Agent\": \"python-httpx/0.23.0\", \n    \"X-Amzn-Trace-Id\": \"Root=1-62a62a8d-5f39b5c50c744da821d6ea99\"\n
+      \ }, \n  \"method\": \"GET\", \n  \"origin\": \"146.200.25.115\"\n}\n"
+    headers:
+      Access-Control-Allow-Credentials:
+      - 'true'
+      Access-Control-Allow-Origin:
+      - '*'
+      Connection:
+      - keep-alive
+      Content-Encoding:
+      - gzip
+      Content-Length:
+      - '230'
+      Content-Type:
+      - application/json
+      Date:
+      - Sun, 12 Jun 2022 18:03:57 GMT
+      Server:
+      - gunicorn/19.9.0
+    http_version: HTTP/1.1
+    status_code: 200
+version: 1

tests/integration/cassettes/gzip_requests.yaml

@@ -0,0 +1,42 @@
+interactions:
+- request:
+    body: null
+    headers:
+      Accept:
+      - '*/*'
+      Accept-Encoding:
+      - gzip, deflate, br
+      Connection:
+      - keep-alive
+      User-Agent:
+      - python-requests/2.28.0
+    method: GET
+    uri: https://httpbin.org/gzip
+  response:
+    body:
+      string: !!binary |
+        H4sIAKwrpmIA/z2OSwrCMBCG956izLIkfQSxkl2RogfQA9R2bIM1iUkqaOndnYDIrGa+/zELDB9l
+        LfYgg5uRwYhtj86DXKDuOrQBJKR5Cuy38kZ3pld6oHu0sqTH29QGZMnVkepgtMYuKKNJcEe0vJ3U
+        C4mcjI9hpaiygqaUW7ETFYGLR8frAXXE9h1Go7nD54w++FxkYp8VsDJ4IBH6E47NmVzGqUHFkn8g
+        rJsvp2omYs8AAAA=
+    headers:
+      Access-Control-Allow-Credentials:
+      - 'true'
+      Access-Control-Allow-Origin:
+      - '*'
+      Connection:
+      - Close
+      Content-Encoding:
+      - gzip
+      Content-Length:
+      - '182'
+      Content-Type:
+      - application/json
+      Date:
+      - Sun, 12 Jun 2022 18:08:44 GMT
+      Server:
+      - Pytest-HTTPBIN/0.1.0
+    status:
+      code: 200
+      message: great
+version: 1

tests/integration/cassettes/test_httpx_test_test_behind_proxy.yml

@@ -13,7 +13,7 @@ interactions:
       user-agent:
       - python-httpx/0.12.1
     method: GET
-    uri: https://httpbin.org/headers
+    uri: https://mockbin.org/headers
   response:
     content: "{\n  \"headers\": {\n    \"Accept\": \"*/*\", \n    \"Accept-Encoding\"\
       : \"gzip, deflate, br\", \n    \"Host\": \"httpbin.org\", \n    \"User-Agent\"\

tests/integration/test_aiohttp.py

@@ -1,21 +1,27 @@
-import contextlib
 import logging
+import ssl
 import urllib.parse
 
 import pytest
+import pytest_httpbin.certs
+import yarl
+
+import vcr
 
 asyncio = pytest.importorskip("asyncio")
 aiohttp = pytest.importorskip("aiohttp")
 
-import vcr  # noqa: E402
+
 from .aiohttp_utils import aiohttp_app, aiohttp_request  # noqa: E402
 
+HTTPBIN_SSL_CONTEXT = ssl.create_default_context(cafile=pytest_httpbin.certs.where())
+
 
 def run_in_loop(fn):
-    with contextlib.closing(asyncio.new_event_loop()) as loop:
-        asyncio.set_event_loop(loop)
-        task = loop.create_task(fn(loop))
-        return loop.run_until_complete(task)
+    async def wrapper():
+        return await fn(asyncio.get_running_loop())
+
+    return asyncio.run(wrapper())
 
 
 def request(method, url, output="text", **kwargs):
@@ -33,14 +39,10 @@ def post(url, output="text", **kwargs):
     return request("POST", url, output="text", **kwargs)
 
 
-@pytest.fixture(params=["https", "http"])
-def scheme(request):
-    """Fixture that returns both http and https."""
-    return request.param
+@pytest.mark.online
+def test_status(tmpdir, httpbin):
+    url = httpbin.url
 
-
-def test_status(tmpdir, scheme):
-    url = scheme + "://httpbin.org"
     with vcr.use_cassette(str(tmpdir.join("status.yaml"))):
         response, _ = get(url)
 
@@ -50,9 +52,10 @@ def test_status(tmpdir, scheme):
         assert cassette.play_count == 1
 
 
+@pytest.mark.online
 @pytest.mark.parametrize("auth", [None, aiohttp.BasicAuth("vcrpy", "test")])
-def test_headers(tmpdir, scheme, auth):
-    url = scheme + "://httpbin.org"
+def test_headers(tmpdir, auth, httpbin):
+    url = httpbin.url
     with vcr.use_cassette(str(tmpdir.join("headers.yaml"))):
         response, _ = get(url, auth=auth)
 
@@ -61,14 +64,16 @@ def test_headers(tmpdir, scheme, auth):
             request = cassette.requests[0]
             assert "AUTHORIZATION" in request.headers
         cassette_response, _ = get(url, auth=auth)
-        assert dict(cassette_response.headers) == dict(response.headers)
+        assert cassette_response.headers.items() == response.headers.items()
         assert cassette.play_count == 1
         assert "istr" not in cassette.data[0]
         assert "yarl.URL" not in cassette.data[0]
 
 
-def test_case_insensitive_headers(tmpdir, scheme):
-    url = scheme + "://httpbin.org"
+@pytest.mark.online
+def test_case_insensitive_headers(tmpdir, httpbin):
+    url = httpbin.url
+
     with vcr.use_cassette(str(tmpdir.join("whatever.yaml"))):
         _, _ = get(url)
 
@@ -79,8 +84,10 @@ def test_case_insensitive_headers(tmpdir, scheme):
         assert cassette.play_count == 1
 
 
-def test_text(tmpdir, scheme):
-    url = scheme + "://httpbin.org"
+@pytest.mark.online
+def test_text(tmpdir, httpbin):
+    url = httpbin.url
+
     with vcr.use_cassette(str(tmpdir.join("text.yaml"))):
         _, response_text = get(url)
 
@@ -90,8 +97,9 @@ def test_text(tmpdir, scheme):
         assert cassette.play_count == 1
 
 
-def test_json(tmpdir, scheme):
-    url = scheme + "://httpbin.org/get"
+@pytest.mark.online
+def test_json(tmpdir, httpbin):
+    url = httpbin.url + "/json"
     headers = {"Content-Type": "application/json"}
 
     with vcr.use_cassette(str(tmpdir.join("json.yaml"))):
@@ -103,8 +111,9 @@ def test_json(tmpdir, scheme):
         assert cassette.play_count == 1
 
 
-def test_binary(tmpdir, scheme):
-    url = scheme + "://httpbin.org/image/png"
+@pytest.mark.online
+def test_binary(tmpdir, httpbin):
+    url = httpbin.url + "/image/png"
     with vcr.use_cassette(str(tmpdir.join("binary.yaml"))):
         _, response_binary = get(url, output="raw")
 
@@ -114,23 +123,25 @@ def test_binary(tmpdir, scheme):
         assert cassette.play_count == 1
 
 
-def test_stream(tmpdir, scheme):
-    url = scheme + "://httpbin.org/get"
+@pytest.mark.online
+def test_stream(tmpdir, httpbin):
+    url = httpbin.url
 
     with vcr.use_cassette(str(tmpdir.join("stream.yaml"))):
-        resp, body = get(url, output="raw")  # Do not use stream here, as the stream is exhausted by vcr
+        _, body = get(url, output="raw")  # Do not use stream here, as the stream is exhausted by vcr
 
     with vcr.use_cassette(str(tmpdir.join("stream.yaml"))) as cassette:
-        cassette_resp, cassette_body = get(url, output="stream")
+        _, cassette_body = get(url, output="stream")
         assert cassette_body == body
         assert cassette.play_count == 1
 
 
+@pytest.mark.online
 @pytest.mark.parametrize("body", ["data", "json"])
-def test_post(tmpdir, scheme, body, caplog):
+def test_post(tmpdir, body, caplog, httpbin):
     caplog.set_level(logging.INFO)
     data = {"key1": "value1", "key2": "value2"}
-    url = scheme + "://httpbin.org/post"
+    url = httpbin.url
     with vcr.use_cassette(str(tmpdir.join("post.yaml"))):
         _, response_json = post(url, **{body: data})
 
@@ -145,14 +156,15 @@ def test_post(tmpdir, scheme, body, caplog):
         (
             log
             for log in caplog.records
-            if log.getMessage() == "<Request (POST) {}> not in cassette, sending to real server".format(url)
+            if log.getMessage() == f"<Request (POST) {url}> not in cassette, sending to real server"
         ),
         None,
     ), "Log message not found."
 
 
-def test_params(tmpdir, scheme):
-    url = scheme + "://httpbin.org/get?d=d"
+@pytest.mark.online
+def test_params(tmpdir, httpbin):
+    url = httpbin.url + "/get?d=d"
     headers = {"Content-Type": "application/json"}
     params = {"a": 1, "b": 2, "c": "c"}
 
@@ -166,8 +178,9 @@ def test_params(tmpdir, scheme):
         assert cassette.play_count == 1
 
 
-def test_params_same_url_distinct_params(tmpdir, scheme):
-    url = scheme + "://httpbin.org/get"
+@pytest.mark.online
+def test_params_same_url_distinct_params(tmpdir, httpbin):
+    url = httpbin.url + "/json"
     headers = {"Content-Type": "application/json"}
     params = {"a": 1, "b": 2, "c": "c"}
 
@@ -180,13 +193,16 @@ def test_params_same_url_distinct_params(tmpdir, scheme):
         assert cassette.play_count == 1
 
     other_params = {"other": "params"}
-    with vcr.use_cassette(str(tmpdir.join("get.yaml"))) as cassette:
-        with pytest.raises(vcr.errors.CannotOverwriteExistingCassetteException):
+    with (
+        vcr.use_cassette(str(tmpdir.join("get.yaml"))) as cassette,
+        pytest.raises(vcr.errors.CannotOverwriteExistingCassetteException),
+    ):
         get(url, output="text", params=other_params)
 
 
-def test_params_on_url(tmpdir, scheme):
-    url = scheme + "://httpbin.org/get?a=1&b=foo"
+@pytest.mark.online
+def test_params_on_url(tmpdir, httpbin):
+    url = httpbin.url + "/get?a=1&b=foo"
     headers = {"Content-Type": "application/json"}
 
     with vcr.use_cassette(str(tmpdir.join("get.yaml"))) as cassette:
@@ -250,8 +266,9 @@ def test_aiohttp_test_client_json(aiohttp_client, tmpdir):
     assert cassette.play_count == 1
 
 
-def test_redirect(aiohttp_client, tmpdir):
-    url = "https://mockbin.org/redirect/302/2"
+@pytest.mark.online
+def test_redirect(tmpdir, httpbin):
+    url = httpbin.url + "/redirect/2"
 
     with vcr.use_cassette(str(tmpdir.join("redirect.yaml"))):
         response, _ = get(url)
@@ -268,15 +285,14 @@ def test_redirect(aiohttp_client, tmpdir):
     # looking request_info.
     assert cassette_response.request_info.url == response.request_info.url
     assert cassette_response.request_info.method == response.request_info.method
-    assert {k: v for k, v in cassette_response.request_info.headers.items()} == {
-        k: v for k, v in response.request_info.headers.items()
-    }
+    assert cassette_response.request_info.headers.items() == response.request_info.headers.items()
     assert cassette_response.request_info.real_url == response.request_info.real_url
 
 
-def test_not_modified(aiohttp_client, tmpdir):
+@pytest.mark.online
+def test_not_modified(tmpdir, httpbin):
     """It doesn't try to redirect on 304"""
-    url = "https://httpbin.org/status/304"
+    url = httpbin.url + "/status/304"
 
     with vcr.use_cassette(str(tmpdir.join("not_modified.yaml"))):
         response, _ = get(url)
@@ -291,13 +307,14 @@ def test_not_modified(aiohttp_client, tmpdir):
         assert cassette.play_count == 1
 
 
-def test_double_requests(tmpdir):
+@pytest.mark.online
+def test_double_requests(tmpdir, httpbin):
     """We should capture, record, and replay all requests and response chains,
     even if there are duplicate ones.
 
     We should replay in the order we saw them.
     """
-    url = "https://httpbin.org/get"
+    url = httpbin.url
 
     with vcr.use_cassette(str(tmpdir.join("text.yaml"))):
         _, response_text1 = get(url, output="text")
@@ -322,31 +339,41 @@ def test_double_requests(tmpdir):
         assert cassette.play_count == 2
 
 
-def test_cookies(scheme, tmpdir):
+def test_cookies(httpbin_both, tmpdir):
     async def run(loop):
-        cookies_url = scheme + (
-            "://httpbin.org/response-headers?"
+        cookies_url = httpbin_both.url + (
+            "/response-headers?"
             "set-cookie=" + urllib.parse.quote("cookie_1=val_1; Path=/") + "&"
             "Set-Cookie=" + urllib.parse.quote("Cookie_2=Val_2; Path=/")
         )
-        home_url = scheme + "://httpbin.org/"
+        home_url = httpbin_both.url + "/"
         tmp = str(tmpdir.join("cookies.yaml"))
         req_cookies = {"Cookie_3": "Val_3"}
         req_headers = {"Cookie": "Cookie_4=Val_4"}
 
         # ------------------------- Record -------------------------- #
         with vcr.use_cassette(tmp) as cassette:
-            async with aiohttp.ClientSession(loop=loop) as session:
-                cookies_resp = await session.get(cookies_url)
-                home_resp = await session.get(home_url, cookies=req_cookies, headers=req_headers)
+            async with aiohttp.ClientSession(loop=loop, cookie_jar=aiohttp.CookieJar(unsafe=True)) as session:
+                cookies_resp = await session.get(cookies_url, ssl=HTTPBIN_SSL_CONTEXT)
+                home_resp = await session.get(
+                    home_url,
+                    cookies=req_cookies,
+                    headers=req_headers,
+                    ssl=HTTPBIN_SSL_CONTEXT,
+                )
                 assert cassette.play_count == 0
         assert_responses(cookies_resp, home_resp)
 
         # -------------------------- Play --------------------------- #
         with vcr.use_cassette(tmp, record_mode=vcr.mode.NONE) as cassette:
-            async with aiohttp.ClientSession(loop=loop) as session:
-                cookies_resp = await session.get(cookies_url)
-                home_resp = await session.get(home_url, cookies=req_cookies, headers=req_headers)
+            async with aiohttp.ClientSession(loop=loop, cookie_jar=aiohttp.CookieJar(unsafe=True)) as session:
+                cookies_resp = await session.get(cookies_url, ssl=HTTPBIN_SSL_CONTEXT)
+                home_resp = await session.get(
+                    home_url,
+                    cookies=req_cookies,
+                    headers=req_headers,
+                    ssl=HTTPBIN_SSL_CONTEXT,
+                )
                 assert cassette.play_count == 2
         assert_responses(cookies_resp, home_resp)
 
@@ -362,57 +389,76 @@ def test_cookies(scheme, tmpdir):
     run_in_loop(run)
 
 
-def test_cookies_redirect(scheme, tmpdir):
+def test_cookies_redirect(httpbin_both, tmpdir):
     async def run(loop):
         # Sets cookie as provided by the query string and redirects
-        cookies_url = scheme + "://httpbin.org/cookies/set?Cookie_1=Val_1"
+        cookies_url = httpbin_both.url + "/cookies/set?Cookie_1=Val_1"
         tmp = str(tmpdir.join("cookies.yaml"))
 
         # ------------------------- Record -------------------------- #
         with vcr.use_cassette(tmp) as cassette:
-            async with aiohttp.ClientSession(loop=loop) as session:
-                cookies_resp = await session.get(cookies_url)
+            async with aiohttp.ClientSession(loop=loop, cookie_jar=aiohttp.CookieJar(unsafe=True)) as session:
+                cookies_resp = await session.get(cookies_url, ssl=HTTPBIN_SSL_CONTEXT)
                 assert not cookies_resp.cookies
-                cookies = session.cookie_jar.filter_cookies(cookies_url)
+                cookies = session.cookie_jar.filter_cookies(yarl.URL(cookies_url))
                 assert cookies["Cookie_1"].value == "Val_1"
                 assert cassette.play_count == 0
-            cassette.requests[1].headers["Cookie"] == "Cookie_1=Val_1"
+
+            assert cassette.requests[1].headers["Cookie"] == "Cookie_1=Val_1"
 
         # -------------------------- Play --------------------------- #
         with vcr.use_cassette(tmp, record_mode=vcr.mode.NONE) as cassette:
-            async with aiohttp.ClientSession(loop=loop) as session:
-                cookies_resp = await session.get(cookies_url)
+            async with aiohttp.ClientSession(loop=loop, cookie_jar=aiohttp.CookieJar(unsafe=True)) as session:
+                cookies_resp = await session.get(cookies_url, ssl=HTTPBIN_SSL_CONTEXT)
                 assert not cookies_resp.cookies
-                cookies = session.cookie_jar.filter_cookies(cookies_url)
+                cookies = session.cookie_jar.filter_cookies(yarl.URL(cookies_url))
                 assert cookies["Cookie_1"].value == "Val_1"
                 assert cassette.play_count == 2
-            cassette.requests[1].headers["Cookie"] == "Cookie_1=Val_1"
+
+            assert cassette.requests[1].headers["Cookie"] == "Cookie_1=Val_1"
 
         # Assert that it's ignoring expiration date
         with vcr.use_cassette(tmp, record_mode=vcr.mode.NONE) as cassette:
             cassette.responses[0]["headers"]["set-cookie"] = [
-                "Cookie_1=Val_1; Expires=Wed, 21 Oct 2015 07:28:00 GMT"
+                "Cookie_1=Val_1; Expires=Wed, 21 Oct 2015 07:28:00 GMT",
             ]
-            async with aiohttp.ClientSession(loop=loop) as session:
-                cookies_resp = await session.get(cookies_url)
+            async with aiohttp.ClientSession(loop=loop, cookie_jar=aiohttp.CookieJar(unsafe=True)) as session:
+                cookies_resp = await session.get(cookies_url, ssl=HTTPBIN_SSL_CONTEXT)
                 assert not cookies_resp.cookies
-                cookies = session.cookie_jar.filter_cookies(cookies_url)
+                cookies = session.cookie_jar.filter_cookies(yarl.URL(cookies_url))
                 assert cookies["Cookie_1"].value == "Val_1"
 
     run_in_loop(run)
 
 
-def test_not_allow_redirects(tmpdir):
-    url = "https://mockbin.org/redirect/308/5"
+@pytest.mark.online
+def test_not_allow_redirects(tmpdir, httpbin):
+    url = httpbin + "/redirect-to?url=.%2F&status_code=308"
     path = str(tmpdir.join("redirects.yaml"))
 
     with vcr.use_cassette(path):
         response, _ = get(url, allow_redirects=False)
-        assert response.url.path == "/redirect/308/5"
+        assert response.url.path == "/redirect-to"
         assert response.status == 308
 
     with vcr.use_cassette(path) as cassette:
         response, _ = get(url, allow_redirects=False)
-        assert response.url.path == "/redirect/308/5"
+        assert response.url.path == "/redirect-to"
         assert response.status == 308
         assert cassette.play_count == 1
+
+
+def test_filter_query_parameters(tmpdir, httpbin):
+    url = httpbin + "?password=secret"
+    path = str(tmpdir.join("query_param_filter.yaml"))
+
+    with vcr.use_cassette(path, filter_query_parameters=["password"]) as cassette:
+        get(url)
+
+    assert "password" not in cassette.requests[0].url
+    assert "secret" not in cassette.requests[0].url
+
+    with open(path) as f:
+        cassette_content = f.read()
+        assert "password" not in cassette_content
+        assert "secret" not in cassette_content

tests/integration/test_basic.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 """Basic tests for cassettes"""
 
 # External imports
@@ -40,7 +39,7 @@ def test_basic_json_use(tmpdir, httpbin):
     test_fixture = str(tmpdir.join("synopsis.json"))
     with vcr.use_cassette(test_fixture, serializer="json"):
         response = urlopen(httpbin.url).read()
-        assert b"difficult sometimes" in response
+        assert b"HTTP Request & Response Service" in response
 
 
 def test_patched_content(tmpdir, httpbin):

tests/integration/test_boto.py

@@ -1,79 +0,0 @@
-import pytest
-
-boto = pytest.importorskip("boto")
-
-import boto  # NOQA
-import boto.iam  # NOQA
-from boto.s3.connection import S3Connection  # NOQA
-from boto.s3.key import Key  # NOQA
-from configparser import DuplicateSectionError  # NOQA
-import vcr  # NOQA
-
-
-def test_boto_stubs(tmpdir):
-    with vcr.use_cassette(str(tmpdir.join("boto-stubs.yml"))):
-        # Perform the imports within the patched context so that
-        # CertValidatingHTTPSConnection refers to the patched version.
-        from boto.https_connection import CertValidatingHTTPSConnection
-        from vcr.stubs.boto_stubs import VCRCertValidatingHTTPSConnection
-
-        # Prove that the class was patched by the stub and that we can instantiate it.
-        assert issubclass(CertValidatingHTTPSConnection, VCRCertValidatingHTTPSConnection)
-        CertValidatingHTTPSConnection("hostname.does.not.matter")
-
-
-def test_boto_without_vcr():
-    s3_conn = S3Connection()
-    s3_bucket = s3_conn.get_bucket("boto-demo-1394171994")  # a bucket you can access
-    k = Key(s3_bucket)
-    k.key = "test.txt"
-    k.set_contents_from_string("hello world i am a string")
-
-
-def test_boto_medium_difficulty(tmpdir):
-    s3_conn = S3Connection()
-    s3_bucket = s3_conn.get_bucket("boto-demo-1394171994")  # a bucket you can access
-    with vcr.use_cassette(str(tmpdir.join("boto-medium.yml"))):
-        k = Key(s3_bucket)
-        k.key = "test.txt"
-        k.set_contents_from_string("hello world i am a string")
-
-    with vcr.use_cassette(str(tmpdir.join("boto-medium.yml"))):
-        k = Key(s3_bucket)
-        k.key = "test.txt"
-        k.set_contents_from_string("hello world i am a string")
-
-
-def test_boto_hardcore_mode(tmpdir):
-    with vcr.use_cassette(str(tmpdir.join("boto-hardcore.yml"))):
-        s3_conn = S3Connection()
-        s3_bucket = s3_conn.get_bucket("boto-demo-1394171994")  # a bucket you can access
-        k = Key(s3_bucket)
-        k.key = "test.txt"
-        k.set_contents_from_string("hello world i am a string")
-
-    with vcr.use_cassette(str(tmpdir.join("boto-hardcore.yml"))):
-        s3_conn = S3Connection()
-        s3_bucket = s3_conn.get_bucket("boto-demo-1394171994")  # a bucket you can access
-        k = Key(s3_bucket)
-        k.key = "test.txt"
-        k.set_contents_from_string("hello world i am a string")
-
-
-def test_boto_iam(tmpdir):
-    try:
-        boto.config.add_section("Boto")
-    except DuplicateSectionError:
-        pass
-    # Ensure that boto uses HTTPS
-    boto.config.set("Boto", "is_secure", "true")
-    # Ensure that boto uses CertValidatingHTTPSConnection
-    boto.config.set("Boto", "https_validate_certificates", "true")
-
-    with vcr.use_cassette(str(tmpdir.join("boto-iam.yml"))):
-        iam_conn = boto.iam.connect_to_region("universal")
-        iam_conn.get_all_users()
-
-    with vcr.use_cassette(str(tmpdir.join("boto-iam.yml"))):
-        iam_conn = boto.iam.connect_to_region("universal")
-        iam_conn.get_all_users()

tests/integration/test_boto3.py

@@ -1,14 +1,15 @@
-import pytest
 import os
 
+import pytest
+
+import vcr
+
 boto3 = pytest.importorskip("boto3")
 
-import boto3  # NOQA
-import botocore  # NOQA
-import vcr  # NOQA
+import botocore  # noqa
 
 try:
-    from botocore import awsrequest  # NOQA
+    from botocore import awsrequest  # noqa
 
     botocore_awsrequest = True
 except ImportError:
@@ -18,12 +19,12 @@ except ImportError:
 # https://github.com/boto/botocore/pull/1495
 boto3_skip_vendored_requests = pytest.mark.skipif(
     botocore_awsrequest,
-    reason="botocore version {ver} does not use vendored requests anymore.".format(ver=botocore.__version__),
+    reason=f"botocore version {botocore.__version__} does not use vendored requests anymore.",
 )
 
 boto3_skip_awsrequest = pytest.mark.skipif(
     not botocore_awsrequest,
-    reason="botocore version {ver} still uses vendored requests.".format(ver=botocore.__version__),
+    reason=f"botocore version {botocore.__version__} still uses vendored requests.",
 )
 
 IAM_USER_NAME = "vcrpy"
@@ -55,24 +56,6 @@ def get_user(iam_client):
     return _get_user
 
 
-@boto3_skip_vendored_requests
-def test_boto_vendored_stubs(tmpdir):
-    with vcr.use_cassette(str(tmpdir.join("boto3-stubs.yml"))):
-        # Perform the imports within the patched context so that
-        # HTTPConnection, VerifiedHTTPSConnection refers to the patched version.
-        from botocore.vendored.requests.packages.urllib3.connectionpool import (
-            HTTPConnection,
-            VerifiedHTTPSConnection,
-        )
-        from vcr.stubs.boto3_stubs import VCRRequestsHTTPConnection, VCRRequestsHTTPSConnection
-
-        # Prove that the class was patched by the stub and that we can instantiate it.
-        assert issubclass(HTTPConnection, VCRRequestsHTTPConnection)
-        assert issubclass(VerifiedHTTPSConnection, VCRRequestsHTTPSConnection)
-        HTTPConnection("hostname.does.not.matter")
-        VerifiedHTTPSConnection("hostname.does.not.matter")
-
-
 @pytest.mark.skipif(
     os.environ.get("TRAVIS_PULL_REQUEST") != "false",
     reason="Encrypted Environment Variables from Travis Repository Settings"
@@ -80,7 +63,6 @@ def test_boto_vendored_stubs(tmpdir):
     "https://docs.travis-ci.com/user/pull-requests/#pull-requests-and-security-restrictions",
 )
 def test_boto_medium_difficulty(tmpdir, get_user):
-
     with vcr.use_cassette(str(tmpdir.join("boto3-medium.yml"))):
         response = get_user()
         assert response["User"]["UserName"] == IAM_USER_NAME

tests/integration/test_config.py

@@ -1,16 +1,20 @@
-import os
 import json
-import pytest
-import vcr
+import os
 from urllib.request import urlopen
 
+import pytest
 
+import vcr
+from vcr.cassette import Cassette
+
+
+@pytest.mark.online
 def test_set_serializer_default_config(tmpdir, httpbin):
     my_vcr = vcr.VCR(serializer="json")
 
     with my_vcr.use_cassette(str(tmpdir.join("test.json"))):
         assert my_vcr.serializer == "json"
-        urlopen(httpbin.url + "/get")
+        urlopen(httpbin.url)
 
     with open(str(tmpdir.join("test.json"))) as f:
         file_content = f.read()
@@ -18,27 +22,30 @@ def test_set_serializer_default_config(tmpdir, httpbin):
         assert json.loads(file_content)
 
 
+@pytest.mark.online
 def test_default_set_cassette_library_dir(tmpdir, httpbin):
     my_vcr = vcr.VCR(cassette_library_dir=str(tmpdir.join("subdir")))
 
     with my_vcr.use_cassette("test.json"):
-        urlopen(httpbin.url + "/get")
+        urlopen(httpbin.url)
 
     assert os.path.exists(str(tmpdir.join("subdir").join("test.json")))
 
 
+@pytest.mark.online
 def test_override_set_cassette_library_dir(tmpdir, httpbin):
     my_vcr = vcr.VCR(cassette_library_dir=str(tmpdir.join("subdir")))
 
     cld = str(tmpdir.join("subdir2"))
 
     with my_vcr.use_cassette("test.json", cassette_library_dir=cld):
-        urlopen(httpbin.url + "/get")
+        urlopen(httpbin.url)
 
     assert os.path.exists(str(tmpdir.join("subdir2").join("test.json")))
     assert not os.path.exists(str(tmpdir.join("subdir").join("test.json")))
 
 
+@pytest.mark.online
 def test_override_match_on(tmpdir, httpbin):
     my_vcr = vcr.VCR(match_on=["method"])
 
@@ -46,7 +53,7 @@ def test_override_match_on(tmpdir, httpbin):
         urlopen(httpbin.url)
 
     with my_vcr.use_cassette(str(tmpdir.join("test.json"))) as cass:
-        urlopen(httpbin.url + "/get")
+        urlopen(httpbin.url)
 
     assert len(cass) == 1
     assert cass.play_count == 1
@@ -55,6 +62,43 @@ def test_override_match_on(tmpdir, httpbin):
 def test_missing_matcher():
     my_vcr = vcr.VCR()
     my_vcr.register_matcher("awesome", object)
-    with pytest.raises(KeyError):
-        with my_vcr.use_cassette("test.yaml", match_on=["notawesome"]):
+    with pytest.raises(KeyError), my_vcr.use_cassette("test.yaml", match_on=["notawesome"]):
         pass
+
+
+@pytest.mark.online
+def test_dont_record_on_exception(tmpdir, httpbin):
+    my_vcr = vcr.VCR(record_on_exception=False)
+
+    @my_vcr.use_cassette(str(tmpdir.join("dontsave.yml")))
+    def some_test():
+        assert b"Not in content" in urlopen(httpbin.url)
+
+    with pytest.raises(AssertionError):
+        some_test()
+
+    assert not os.path.exists(str(tmpdir.join("dontsave.yml")))
+
+    # Make sure context decorator has the same behavior
+    with pytest.raises(AssertionError), my_vcr.use_cassette(str(tmpdir.join("dontsave2.yml"))):
+        assert b"Not in content" in urlopen(httpbin.url).read()
+
+    assert not os.path.exists(str(tmpdir.join("dontsave2.yml")))
+
+
+def test_set_drop_unused_requests(tmpdir, httpbin):
+    my_vcr = vcr.VCR(drop_unused_requests=True)
+    file = str(tmpdir.join("test.yaml"))
+
+    with my_vcr.use_cassette(file):
+        urlopen(httpbin.url)
+        urlopen(httpbin.url + "/get")
+
+    cassette = Cassette.load(path=file)
+    assert len(cassette) == 2
+
+    with my_vcr.use_cassette(file):
+        urlopen(httpbin.url)
+
+    cassette = Cassette.load(path=file)
+    assert len(cassette) == 1

tests/integration/test_disksaver.py

@@ -1,4 +1,3 @@
-# -*- coding: utf-8 -*-
 """Basic tests about save behavior"""
 
 # External imports
@@ -6,10 +5,13 @@ import os
 import time
 from urllib.request import urlopen
 
+import pytest
+
 # Internal imports
 import vcr
 
 
+@pytest.mark.online
 def test_disk_saver_nowrite(tmpdir, httpbin):
     """
     Ensure that when you close a cassette without changing it it doesn't
@@ -30,6 +32,7 @@ def test_disk_saver_nowrite(tmpdir, httpbin):
     assert last_mod == last_mod2
 
 
+@pytest.mark.online
 def test_disk_saver_write(tmpdir, httpbin):
     """
     Ensure that when you close a cassette after changing it it does

tests/integration/test_filter.py

@@ -1,11 +1,14 @@
 import base64
-import pytest
-from urllib.request import urlopen, Request
-from urllib.parse import urlencode
-from urllib.error import HTTPError
-import vcr
 import json
-from assertions import assert_cassette_has_one_response, assert_is_json
+from urllib.error import HTTPError
+from urllib.parse import urlencode
+from urllib.request import Request, urlopen
+
+import pytest
+
+import vcr
+
+from ..assertions import assert_cassette_has_one_response, assert_is_json_bytes
 
 
 def _request_with_auth(url, username, password):
@@ -43,13 +46,18 @@ def test_filter_basic_auth(tmpdir, httpbin):
 
 
 def test_filter_querystring(tmpdir, httpbin):
-    url = httpbin.url + "/?foo=bar"
+    url = httpbin.url + "/?password=secret"
     cass_file = str(tmpdir.join("filter_qs.yaml"))
-    with vcr.use_cassette(cass_file, filter_query_parameters=["foo"]):
+    with vcr.use_cassette(cass_file, filter_query_parameters=["password"]):
         urlopen(url)
-    with vcr.use_cassette(cass_file, filter_query_parameters=["foo"]) as cass:
+    with vcr.use_cassette(cass_file, filter_query_parameters=["password"]) as cass:
         urlopen(url)
-        assert "foo" not in cass.requests[0].url
+        assert "password" not in cass.requests[0].url
+        assert "secret" not in cass.requests[0].url
+    with open(cass_file) as f:
+        cassette_content = f.read()
+        assert "password" not in cassette_content
+        assert "secret" not in cassette_content
 
 
 def test_filter_post_data(tmpdir, httpbin):
@@ -103,7 +111,19 @@ def test_decompress_gzip(tmpdir, httpbin):
     with vcr.use_cassette(cass_file) as cass:
         decoded_response = urlopen(url).read()
         assert_cassette_has_one_response(cass)
-    assert_is_json(decoded_response)
+    assert_is_json_bytes(decoded_response)
+
+
+def test_decomptess_empty_body(tmpdir, httpbin):
+    url = httpbin.url + "/gzip"
+    request = Request(url, headers={"Accept-Encoding": ["gzip, deflate"]}, method="HEAD")
+    cass_file = str(tmpdir.join("gzip_empty_response.yaml"))
+    with vcr.use_cassette(cass_file, decode_compressed_response=True):
+        response = urlopen(request).read()
+    with vcr.use_cassette(cass_file) as cass:
+        decoded_response = urlopen(request).read()
+        assert_cassette_has_one_response(cass)
+    assert decoded_response == response
 
 
 def test_decompress_deflate(tmpdir, httpbin):
@@ -115,7 +135,7 @@ def test_decompress_deflate(tmpdir, httpbin):
     with vcr.use_cassette(cass_file) as cass:
         decoded_response = urlopen(url).read()
         assert_cassette_has_one_response(cass)
-    assert_is_json(decoded_response)
+    assert_is_json_bytes(decoded_response)
 
 
 def test_decompress_regular(tmpdir, httpbin):
@@ -127,4 +147,25 @@ def test_decompress_regular(tmpdir, httpbin):
     with vcr.use_cassette(cass_file) as cass:
         resp = urlopen(url).read()
         assert_cassette_has_one_response(cass)
-    assert_is_json(resp)
+    assert_is_json_bytes(resp)
+
+
+def test_before_record_request_corruption(tmpdir, httpbin):
+    """Modifying request in before_record_request should not affect outgoing request"""
+
+    def before_record(request):
+        request.headers.clear()
+        request.body = b""
+        return request
+
+    req = Request(
+        httpbin.url + "/post",
+        data=urlencode({"test": "exists"}).encode(),
+        headers={"X-Test": "exists"},
+    )
+    cass_file = str(tmpdir.join("modified_response.yaml"))
+    with vcr.use_cassette(cass_file, before_record_request=before_record):
+        resp = json.loads(urlopen(req).read())
+
+    assert resp["headers"]["X-Test"] == "exists"
+    assert resp["form"]["test"] == "exists"

tests/integration/test_httplib2.py

@@ -1,15 +1,13 @@
-# -*- coding: utf-8 -*-
 """Integration tests with httplib2"""
 
-import sys
-
 from urllib.parse import urlencode
+
 import pytest
 import pytest_httpbin.certs
 
 import vcr
 
-from assertions import assert_cassette_has_one_response
+from ..assertions import assert_cassette_has_one_response
 
 httplib2 = pytest.importorskip("httplib2")
 
@@ -20,8 +18,6 @@ def http():
     with the certificate replaced by the httpbin one.
     """
     kwargs = {"ca_certs": pytest_httpbin.certs.where()}
-    if sys.version_info[:2] in [(2, 7), (3, 7)]:
-        kwargs["disable_ssl_certificate_validation"] = True
     return httplib2.Http(**kwargs)
 
 
@@ -61,14 +57,15 @@ def test_response_headers(tmpdir, httpbin_both):
         assert set(headers) == set(resp.items())
 
 
-def test_effective_url(tmpdir):
+@pytest.mark.online
+def test_effective_url(tmpdir, httpbin):
     """Ensure that the effective_url is captured"""
-    url = "http://mockbin.org/redirect/301"
+    url = httpbin.url + "/redirect-to?url=.%2F&status_code=301"
 
     with vcr.use_cassette(str(tmpdir.join("headers.yaml"))):
         resp, _ = http().request(url)
         effective_url = resp["content-location"]
-        assert effective_url == "http://mockbin.org/redirect/301/0"
+        assert effective_url == httpbin.url + "/"
 
     with vcr.use_cassette(str(tmpdir.join("headers.yaml"))):
         resp, _ = http().request(url)

tests/integration/test_httpx.py

@@ -1,11 +1,19 @@
-import pytest
 import os
 
+import pytest
+
+import vcr
+
+from ..assertions import assert_is_json_bytes
+
 asyncio = pytest.importorskip("asyncio")
 httpx = pytest.importorskip("httpx")
 
-import vcr  # noqa: E402
-from vcr.stubs.httpx_stubs import HTTPX_REDIRECT_PARAM  # noqa: E402
+
+@pytest.fixture(params=["https", "http"])
+def scheme(request):
+    """Fixture that returns both http and https."""
+    return request.param
 
 
 class BaseDoRequest:
@@ -14,6 +22,7 @@ class BaseDoRequest:
     def __init__(self, *args, **kwargs):
         self._client_args = args
         self._client_kwargs = kwargs
+        self._client_kwargs["follow_redirects"] = self._client_kwargs.get("follow_redirects", True)
 
     def _make_client(self):
         return self._client_class(*self._client_args, **self._client_kwargs)
@@ -23,22 +32,37 @@ class DoSyncRequest(BaseDoRequest):
     _client_class = httpx.Client
 
     def __enter__(self):
+        self._client = self._make_client()
         return self
 
     def __exit__(self, *args):
-        pass
+        self._client.close()
+        del self._client
 
     @property
     def client(self):
         try:
             return self._client
-        except AttributeError:
-            self._client = self._make_client()
-            return self._client
+        except AttributeError as e:
+            raise ValueError('To access sync client, use "with do_request() as client"') from e
 
     def __call__(self, *args, **kwargs):
+        if hasattr(self, "_client"):
             return self.client.request(*args, timeout=60, **kwargs)
 
+        # Use one-time context and dispose of the client afterwards
+        with self:
+            return self.client.request(*args, timeout=60, **kwargs)
+
+    def stream(self, *args, **kwargs):
+        if hasattr(self, "_client"):
+            with self.client.stream(*args, **kwargs) as response:
+                return b"".join(response.iter_bytes())
+
+        # Use one-time context and dispose of the client afterwards
+        with self, self.client.stream(*args, **kwargs) as response:
+            return b"".join(response.iter_bytes())
+
 
 class DoAsyncRequest(BaseDoRequest):
     _client_class = httpx.AsyncClient
@@ -64,8 +88,8 @@ class DoAsyncRequest(BaseDoRequest):
     def client(self):
         try:
             return self._client
-        except AttributeError:
-            raise ValueError('To access async client, use "with do_request() as client"')
+        except AttributeError as e:
+            raise ValueError('To access async client, use "with do_request() as client"') from e
 
     def __call__(self, *args, **kwargs):
         if hasattr(self, "_loop"):
@@ -73,14 +97,27 @@ class DoAsyncRequest(BaseDoRequest):
 
         # Use one-time context and dispose of the loop/client afterwards
         with self:
-            return self(*args, **kwargs)
+            return self._loop.run_until_complete(self.client.request(*args, **kwargs))
+
+    async def _get_stream(self, *args, **kwargs):
+        async with self.client.stream(*args, **kwargs) as response:
+            content = b""
+            async for c in response.aiter_bytes():
+                content += c
+        return content
+
+    def stream(self, *args, **kwargs):
+        if hasattr(self, "_loop"):
+            return self._loop.run_until_complete(self._get_stream(*args, **kwargs))
+
+        # Use one-time context and dispose of the loop/client afterwards
+        with self:
+            return self._loop.run_until_complete(self._get_stream(*args, **kwargs))
 
 
 def pytest_generate_tests(metafunc):
     if "do_request" in metafunc.fixturenames:
         metafunc.parametrize("do_request", [DoAsyncRequest, DoSyncRequest])
-    if "scheme" in metafunc.fixturenames:
-        metafunc.parametrize("scheme", ["http", "https"])
 
 
 @pytest.fixture
@@ -88,8 +125,10 @@ def yml(tmpdir, request):
     return str(tmpdir.join(request.function.__name__ + ".yaml"))
 
 
-def test_status(tmpdir, scheme, do_request):
-    url = scheme + "://mockbin.org/request"
+@pytest.mark.online
+def test_status(tmpdir, httpbin, do_request):
+    url = httpbin.url
+
     with vcr.use_cassette(str(tmpdir.join("status.yaml"))):
         response = do_request()("GET", url)
 
@@ -99,8 +138,10 @@ def test_status(tmpdir, scheme, do_request):
         assert cassette.play_count == 1
 
 
-def test_case_insensitive_headers(tmpdir, scheme, do_request):
-    url = scheme + "://mockbin.org/request"
+@pytest.mark.online
+def test_case_insensitive_headers(tmpdir, httpbin, do_request):
+    url = httpbin.url
+
     with vcr.use_cassette(str(tmpdir.join("whatever.yaml"))):
         do_request()("GET", url)
 
@@ -111,8 +152,10 @@ def test_case_insensitive_headers(tmpdir, scheme, do_request):
         assert cassette.play_count == 1
 
 
-def test_content(tmpdir, scheme, do_request):
-    url = scheme + "://httpbin.org"
+@pytest.mark.online
+def test_content(tmpdir, httpbin, do_request):
+    url = httpbin.url
+
     with vcr.use_cassette(str(tmpdir.join("cointent.yaml"))):
         response = do_request()("GET", url)
 
@@ -122,21 +165,22 @@ def test_content(tmpdir, scheme, do_request):
         assert cassette.play_count == 1
 
 
-def test_json(tmpdir, scheme, do_request):
-    url = scheme + "://httpbin.org/get"
-    headers = {"Content-Type": "application/json"}
+@pytest.mark.online
+def test_json(tmpdir, httpbin, do_request):
+    url = httpbin.url + "/json"
 
     with vcr.use_cassette(str(tmpdir.join("json.yaml"))):
-        response = do_request(headers=headers)("GET", url)
+        response = do_request()("GET", url)
 
     with vcr.use_cassette(str(tmpdir.join("json.yaml"))) as cassette:
-        cassette_response = do_request(headers=headers)("GET", url)
+        cassette_response = do_request()("GET", url)
         assert cassette_response.json() == response.json()
         assert cassette.play_count == 1
 
 
-def test_params_same_url_distinct_params(tmpdir, scheme, do_request):
-    url = scheme + "://httpbin.org/get"
+@pytest.mark.online
+def test_params_same_url_distinct_params(tmpdir, httpbin, do_request):
+    url = httpbin.url + "/get"
     headers = {"Content-Type": "application/json"}
     params = {"a": 1, "b": False, "c": "c"}
 
@@ -150,51 +194,39 @@ def test_params_same_url_distinct_params(tmpdir, scheme, do_request):
         assert cassette.play_count == 1
 
     params = {"other": "params"}
-    with vcr.use_cassette(str(tmpdir.join("get.yaml"))) as cassette:
-        with pytest.raises(vcr.errors.CannotOverwriteExistingCassetteException):
+    with (
+        vcr.use_cassette(str(tmpdir.join("get.yaml"))) as cassette,
+        pytest.raises(vcr.errors.CannotOverwriteExistingCassetteException),
+    ):
         do_request()("GET", url, params=params, headers=headers)
 
 
-def test_redirect(tmpdir, do_request, yml):
-    url = "https://mockbin.org/redirect/303/2"
+@pytest.mark.online
+def test_redirect(httpbin, yml, do_request):
+    url = httpbin.url + "/redirect-to"
 
-    redirect_kwargs = {HTTPX_REDIRECT_PARAM.name: True}
-
-    response = do_request()("GET", url, **redirect_kwargs)
+    response = do_request()("GET", url)
     with vcr.use_cassette(yml):
-        response = do_request()("GET", url, **redirect_kwargs)
+        response = do_request()("GET", url, params={"url": "./get", "status_code": 302})
 
     with vcr.use_cassette(yml) as cassette:
-        cassette_response = do_request()("GET", url, **redirect_kwargs)
+        cassette_response = do_request()("GET", url, params={"url": "./get", "status_code": 302})
 
         assert cassette_response.status_code == response.status_code
         assert len(cassette_response.history) == len(response.history)
-        assert len(cassette) == 3
-        assert cassette.play_count == 3
+        assert len(cassette) == 2
+        assert cassette.play_count == 2
 
     # Assert that the real response and the cassette response have a similar
     # looking request_info.
     assert cassette_response.request.url == response.request.url
     assert cassette_response.request.method == response.request.method
-    assert {k: v for k, v in cassette_response.request.headers.items()} == {
-        k: v for k, v in response.request.headers.items()
-    }
-
-
-def test_work_with_gzipped_data(tmpdir, do_request, yml):
-    with vcr.use_cassette(yml):
-        do_request()("GET", "https://httpbin.org/gzip")
-
-    with vcr.use_cassette(yml) as cassette:
-        cassette_response = do_request()("GET", "https://httpbin.org/gzip")
-
-        assert "gzip" in cassette_response.json()["headers"]["Accept-Encoding"]
-        assert cassette_response.read()
-        assert cassette.play_count == 1
+    assert cassette_response.request.headers.items() == response.request.headers.items()
 
 
+@pytest.mark.online
 @pytest.mark.parametrize("url", ["https://github.com/kevin1024/vcrpy/issues/" + str(i) for i in range(3, 6)])
-def test_simple_fetching(tmpdir, do_request, yml, url):
+def test_simple_fetching(do_request, yml, url):
     with vcr.use_cassette(yml):
         do_request()("GET", url)
 
@@ -204,96 +236,127 @@ def test_simple_fetching(tmpdir, do_request, yml, url):
         assert cassette.play_count == 1
 
 
-def test_behind_proxy(do_request):
-    # This is recorded because otherwise we should have a live proxy somewhere.
-    yml = (
-        os.path.dirname(os.path.realpath(__file__)) + "/cassettes/" + "test_httpx_test_test_behind_proxy.yml"
-    )
-    url = "https://httpbin.org/headers"
-    proxy = "http://localhost:8080"
-    proxies = {"http://": proxy, "https://": proxy}
-
-    with vcr.use_cassette(yml):
-        response = do_request(proxies=proxies, verify=False)("GET", url)
-
-    with vcr.use_cassette(yml) as cassette:
-        cassette_response = do_request(proxies=proxies, verify=False)("GET", url)
-        assert str(cassette_response.request.url) == url
-        assert cassette.play_count == 1
-
-        assert cassette_response.headers["Via"] == "my_own_proxy", str(cassette_response.headers)
-        assert cassette_response.request.url == response.request.url
-
-
-def test_cookies(tmpdir, scheme, do_request):
+@pytest.mark.online
+def test_cookies(tmpdir, httpbin, do_request):
     def client_cookies(client):
-        return [c for c in client.client.cookies]
+        return list(client.client.cookies)
 
     def response_cookies(response):
-        return [c for c in response.cookies]
+        return list(response.cookies)
 
-    with do_request() as client:
+    url = httpbin.url + "/cookies/set"
+    params = {"k1": "v1", "k2": "v2"}
+
+    with do_request(params=params, follow_redirects=False) as client:
         assert client_cookies(client) == []
 
-        redirect_kwargs = {HTTPX_REDIRECT_PARAM.name: True}
-
-        url = scheme + "://httpbin.org"
         testfile = str(tmpdir.join("cookies.yml"))
         with vcr.use_cassette(testfile):
-            r1 = client("GET", url + "/cookies/set?k1=v1&k2=v2", **redirect_kwargs)
-            assert response_cookies(r1.history[0]) == ["k1", "k2"]
-            assert response_cookies(r1) == []
+            r1 = client("GET", url)
 
-            r2 = client("GET", url + "/cookies", **redirect_kwargs)
-            assert len(r2.json()["cookies"]) == 2
+            assert response_cookies(r1) == ["k1", "k2"]
 
+            r2 = client("GET", url)
+
+            assert response_cookies(r2) == ["k1", "k2"]
             assert client_cookies(client) == ["k1", "k2"]
 
-    with do_request() as new_client:
+    with do_request(params=params, follow_redirects=False) as new_client:
         assert client_cookies(new_client) == []
 
         with vcr.use_cassette(testfile) as cassette:
-            cassette_response = new_client("GET", url + "/cookies/set?k1=v1&k2=v2")
-            assert response_cookies(cassette_response.history[0]) == ["k1", "k2"]
-            assert response_cookies(cassette_response) == []
+            cassette_response = new_client("GET", url)
 
-            assert cassette.play_count == 2
+            assert cassette.play_count == 1
+            assert response_cookies(cassette_response) == ["k1", "k2"]
             assert client_cookies(new_client) == ["k1", "k2"]
 
 
-def test_relative_redirects(tmpdir, scheme, do_request):
-    redirect_kwargs = {HTTPX_REDIRECT_PARAM.name: True}
+@pytest.mark.online
+def test_stream(tmpdir, httpbin, do_request):
+    url = httpbin.url + "/stream-bytes/512"
+    testfile = str(tmpdir.join("stream.yml"))
 
-    url = scheme + "://mockbin.com/redirect/301?to=/redirect/301?to=/request"
-    testfile = str(tmpdir.join("relative_redirects.yml"))
     with vcr.use_cassette(testfile):
-        response = do_request()("GET", url, **redirect_kwargs)
-        assert len(response.history) == 2, response
-        assert response.json()["url"].endswith("request")
+        response_content = do_request().stream("GET", url)
+        assert len(response_content) == 512
 
     with vcr.use_cassette(testfile) as cassette:
-        response = do_request()("GET", url, **redirect_kwargs)
-        assert len(response.history) == 2
-        assert response.json()["url"].endswith("request")
-
-        assert cassette.play_count == 3
+        cassette_content = do_request().stream("GET", url)
+        assert cassette_content == response_content
+        assert len(cassette_content) == 512
+        assert cassette.play_count == 1
 
 
-def test_redirect_wo_allow_redirects(do_request, yml):
-    url = "https://mockbin.org/redirect/308/5"
-
-    redirect_kwargs = {HTTPX_REDIRECT_PARAM.name: False}
-
-    with vcr.use_cassette(yml):
-        response = do_request()("GET", url, **redirect_kwargs)
-
-        assert str(response.url).endswith("308/5")
-        assert response.status_code == 308
+# Regular cassette formats support the status reason,
+# but the old HTTPX cassette format does not.
+@pytest.mark.parametrize(
+    "cassette_name,reason",
+    [
+        ("requests", "great"),
+        ("httpx_old_format", "OK"),
+    ],
+)
+def test_load_cassette_format(do_request, cassette_name, reason):
+    mydir = os.path.dirname(os.path.realpath(__file__))
+    yml = f"{mydir}/cassettes/gzip_{cassette_name}.yaml"
+    url = "https://httpbin.org/gzip"
 
     with vcr.use_cassette(yml) as cassette:
-        response = do_request()("GET", url, **redirect_kwargs)
-
-        assert str(response.url).endswith("308/5")
-        assert response.status_code == 308
-
+        cassette_response = do_request()("GET", url)
+        assert str(cassette_response.request.url) == url
         assert cassette.play_count == 1
+
+        # Should be able to load up the JSON inside,
+        # regardless whether the content is the gzipped
+        # in the cassette or not.
+        json = cassette_response.json()
+        assert json["method"] == "GET", json
+        assert cassette_response.status_code == 200
+        assert cassette_response.reason_phrase == reason
+
+
+def test_gzip__decode_compressed_response_false(tmpdir, httpbin, do_request):
+    """
+    Ensure that httpx is able to automatically decompress the response body.
+    """
+    for _ in range(2):  # one for recording, one for re-playing
+        with vcr.use_cassette(str(tmpdir.join("gzip.yaml"))) as cassette:
+            response = do_request()("GET", httpbin + "/gzip")
+            assert response.headers["content-encoding"] == "gzip"  # i.e. not removed
+            # The content stored in the cassette should be gzipped.
+            assert cassette.responses[0]["body"]["string"][:2] == b"\x1f\x8b"
+            assert_is_json_bytes(response.content)  # i.e. uncompressed bytes
+
+
+def test_gzip__decode_compressed_response_true(do_request, tmpdir, httpbin):
+    url = httpbin + "/gzip"
+
+    expected_response = do_request()("GET", url)
+    expected_content = expected_response.content
+    assert expected_response.headers["content-encoding"] == "gzip"  # self-test
+
+    with vcr.use_cassette(
+        str(tmpdir.join("decode_compressed.yaml")),
+        decode_compressed_response=True,
+    ) as cassette:
+        r = do_request()("GET", url)
+        assert r.headers["content-encoding"] == "gzip"  # i.e. not removed
+        content_length = r.headers["content-length"]
+        assert r.content == expected_content
+
+    # Has the cassette body been decompressed?
+    cassette_response_body = cassette.responses[0]["body"]["string"]
+    assert isinstance(cassette_response_body, str)
+
+    # Content should be JSON.
+    assert cassette_response_body[0:1] == "{"
+
+    with vcr.use_cassette(str(tmpdir.join("decode_compressed.yaml")), decode_compressed_response=True):
+        r = httpx.get(url)
+        assert "content-encoding" not in r.headers  # i.e. removed
+        assert r.content == expected_content
+
+        # As the content is uncompressed, it should have a bigger
+        # length than the compressed version.
+        assert r.headers["content-length"] > content_length

tests/integration/test_ignore.py

@@ -1,6 +1,7 @@
-from urllib.request import urlopen
 import socket
 from contextlib import contextmanager
+from urllib.request import urlopen
+
 import vcr
 
 
@@ -27,9 +28,9 @@ def test_ignore_localhost(tmpdir, httpbin):
     with overridden_dns({"httpbin.org": "127.0.0.1"}):
         cass_file = str(tmpdir.join("filter_qs.yaml"))
         with vcr.use_cassette(cass_file, ignore_localhost=True) as cass:
-            urlopen("http://localhost:{}/".format(httpbin.port))
+            urlopen(f"http://localhost:{httpbin.port}/")
             assert len(cass) == 0
-            urlopen("http://httpbin.org:{}/".format(httpbin.port))
+            urlopen(f"http://httpbin.org:{httpbin.port}/")
             assert len(cass) == 1
 
 
@@ -37,9 +38,9 @@ def test_ignore_httpbin(tmpdir, httpbin):
     with overridden_dns({"httpbin.org": "127.0.0.1"}):
         cass_file = str(tmpdir.join("filter_qs.yaml"))
         with vcr.use_cassette(cass_file, ignore_hosts=["httpbin.org"]) as cass:
-            urlopen("http://httpbin.org:{}/".format(httpbin.port))
+            urlopen(f"http://httpbin.org:{httpbin.port}/")
             assert len(cass) == 0
-            urlopen("http://localhost:{}/".format(httpbin.port))
+            urlopen(f"http://localhost:{httpbin.port}/")
             assert len(cass) == 1
 
 
@@ -47,8 +48,8 @@ def test_ignore_localhost_and_httpbin(tmpdir, httpbin):
     with overridden_dns({"httpbin.org": "127.0.0.1"}):
         cass_file = str(tmpdir.join("filter_qs.yaml"))
         with vcr.use_cassette(cass_file, ignore_hosts=["httpbin.org"], ignore_localhost=True) as cass:
-            urlopen("http://httpbin.org:{}".format(httpbin.port))
-            urlopen("http://localhost:{}".format(httpbin.port))
+            urlopen(f"http://httpbin.org:{httpbin.port}")
+            urlopen(f"http://localhost:{httpbin.port}")
             assert len(cass) == 0
 
 
@@ -56,12 +57,12 @@ def test_ignore_localhost_twice(tmpdir, httpbin):
     with overridden_dns({"httpbin.org": "127.0.0.1"}):
         cass_file = str(tmpdir.join("filter_qs.yaml"))
         with vcr.use_cassette(cass_file, ignore_localhost=True) as cass:
-            urlopen("http://localhost:{}".format(httpbin.port))
+            urlopen(f"http://localhost:{httpbin.port}")
             assert len(cass) == 0
-            urlopen("http://httpbin.org:{}".format(httpbin.port))
+            urlopen(f"http://httpbin.org:{httpbin.port}")
             assert len(cass) == 1
         with vcr.use_cassette(cass_file, ignore_localhost=True) as cass:
             assert len(cass) == 1
-            urlopen("http://localhost:{}".format(httpbin.port))
-            urlopen("http://httpbin.org:{}".format(httpbin.port))
+            urlopen(f"http://localhost:{httpbin.port}")
+            urlopen(f"http://httpbin.org:{httpbin.port}")
             assert len(cass) == 1

tests/integration/test_matchers.py

@@ -1,7 +1,8 @@
-import vcr
-import pytest
 from urllib.request import urlopen
 
+import pytest
+
+import vcr
 
 DEFAULT_URI = "http://httpbin.org/get?p1=q1&p2=q2"  # base uri for testing
 
@@ -35,7 +36,6 @@ def cassette(tmpdir, httpbin, httpbin_secure):
     ],
 )
 def test_matchers(httpbin, httpbin_secure, cassette, matcher, matching_uri, not_matching_uri):
-
     matching_uri = _replace_httpbin(matching_uri, httpbin, httpbin_secure)
     not_matching_uri = _replace_httpbin(not_matching_uri, httpbin, httpbin_secure)
     default_uri = _replace_httpbin(DEFAULT_URI, httpbin, httpbin_secure)
@@ -51,8 +51,10 @@ def test_matchers(httpbin, httpbin_secure, cassette, matcher, matching_uri, not_
         assert cass.play_count == 1
 
     # play cassette with not matching on uri, it should fail
-    with pytest.raises(vcr.errors.CannotOverwriteExistingCassetteException):
-        with vcr.use_cassette(cassette, match_on=[matcher]) as cass:
+    with (
+        pytest.raises(vcr.errors.CannotOverwriteExistingCassetteException),
+        vcr.use_cassette(cassette, match_on=[matcher]) as cass,
+    ):
         urlopen(not_matching_uri)
 
 
@@ -65,17 +67,23 @@ def test_method_matcher(cassette, httpbin, httpbin_secure):
         assert cass.play_count == 1
 
     # should fail if method does not match
-    with pytest.raises(vcr.errors.CannotOverwriteExistingCassetteException):
-        with vcr.use_cassette(cassette, match_on=["method"]) as cass:
+    with (
+        pytest.raises(vcr.errors.CannotOverwriteExistingCassetteException),
+        vcr.use_cassette(cassette, match_on=["method"]) as cass,
+    ):
         # is a POST request
         urlopen(default_uri, data=b"")
 
 
 @pytest.mark.parametrize(
-    "uri", [DEFAULT_URI, "http://httpbin.org/get?p2=q2&p1=q1", "http://httpbin.org/get?p2=q2&p1=q1"]
+    "uri",
+    (
+        DEFAULT_URI,
+        "http://httpbin.org/get?p2=q2&p1=q1",
+        "http://httpbin.org/get?p2=q2&p1=q1",
+    ),
 )
 def test_default_matcher_matches(cassette, uri, httpbin, httpbin_secure):
-
     uri = _replace_httpbin(uri, httpbin, httpbin_secure)
 
     with vcr.use_cassette(cassette) as cass:
@@ -94,14 +102,12 @@ def test_default_matcher_matches(cassette, uri, httpbin, httpbin_secure):
 )
 def test_default_matcher_does_not_match(cassette, uri, httpbin, httpbin_secure):
     uri = _replace_httpbin(uri, httpbin, httpbin_secure)
-    with pytest.raises(vcr.errors.CannotOverwriteExistingCassetteException):
-        with vcr.use_cassette(cassette):
+    with pytest.raises(vcr.errors.CannotOverwriteExistingCassetteException), vcr.use_cassette(cassette):
         urlopen(uri)
 
 
 def test_default_matcher_does_not_match_on_method(cassette, httpbin, httpbin_secure):
     default_uri = _replace_httpbin(DEFAULT_URI, httpbin, httpbin_secure)
-    with pytest.raises(vcr.errors.CannotOverwriteExistingCassetteException):
-        with vcr.use_cassette(cassette):
+    with pytest.raises(vcr.errors.CannotOverwriteExistingCassetteException), vcr.use_cassette(cassette):
         # is a POST request
         urlopen(default_uri, data=b"")

tests/integration/test_multiple.py

@@ -1,7 +1,10 @@
-import pytest
-import vcr
 from urllib.request import urlopen
 
+import pytest
+
+import vcr
+from vcr.errors import CannotOverwriteExistingCassetteException
+
 
 def test_making_extra_request_raises_exception(tmpdir, httpbin):
     # make two requests in the first request that are considered
@@ -16,5 +19,5 @@ def test_making_extra_request_raises_exception(tmpdir, httpbin):
     with vcr.use_cassette(str(tmpdir.join("test.json")), match_on=["method"]):
         assert urlopen(httpbin.url + "/status/200").getcode() == 200
         assert urlopen(httpbin.url + "/status/201").getcode() == 201
-        with pytest.raises(Exception):
+        with pytest.raises(CannotOverwriteExistingCassetteException):
             urlopen(httpbin.url + "/status/200")

tests/integration/test_proxy.py

@@ -1,15 +1,13 @@
-# -*- coding: utf-8 -*-
 """Test using a proxy."""
 
-# External imports
-import multiprocessing
-import pytest
-
+import asyncio
 import http.server
 import socketserver
+import threading
 from urllib.request import urlopen
 
-# Internal imports
+import pytest
+
 import vcr
 
 # Conditional imports
@@ -32,20 +30,51 @@ class Proxy(http.server.SimpleHTTPRequestHandler):
             # In Python 2 the response is an addinfourl instance.
             status = upstream_response.code
             headers = upstream_response.info().items()
-        self.send_response(status, upstream_response.msg)
+        self.log_request(status)
+        self.send_response_only(status, upstream_response.msg)
         for header in headers:
             self.send_header(*header)
         self.end_headers()
         self.copyfile(upstream_response, self.wfile)
 
+    def do_CONNECT(self):
+        host, port = self.path.split(":")
 
-@pytest.yield_fixture(scope="session")
+        asyncio.run(self._tunnel(host, port, self.connection))
+
+    async def _tunnel(self, host, port, client_sock):
+        target_r, target_w = await asyncio.open_connection(host=host, port=port)
+
+        self.send_response(http.HTTPStatus.OK)
+        self.end_headers()
+
+        source_r, source_w = await asyncio.open_connection(sock=client_sock)
+
+        async def channel(reader, writer):
+            while True:
+                data = await reader.read(1024)
+                if not data:
+                    break
+                writer.write(data)
+                await writer.drain()
+
+            writer.close()
+            await writer.wait_closed()
+
+        await asyncio.gather(
+            channel(target_r, source_w),
+            channel(source_r, target_w),
+        )
+
+
+@pytest.fixture(scope="session")
 def proxy_server():
-    httpd = socketserver.ThreadingTCPServer(("", 0), Proxy)
-    proxy_process = multiprocessing.Process(target=httpd.serve_forever)
+    with socketserver.ThreadingTCPServer(("", 0), Proxy) as httpd:
+        proxy_process = threading.Thread(target=httpd.serve_forever)
         proxy_process.start()
         yield "http://{}:{}".format(*httpd.server_address)
-    proxy_process.terminate()
+        httpd.shutdown()
+        proxy_process.join()
 
 
 def test_use_proxy(tmpdir, httpbin, proxy_server):
@@ -53,8 +82,26 @@ def test_use_proxy(tmpdir, httpbin, proxy_server):
     with vcr.use_cassette(str(tmpdir.join("proxy.yaml"))):
         response = requests.get(httpbin.url, proxies={"http": proxy_server})
 
-    with vcr.use_cassette(str(tmpdir.join("proxy.yaml"))) as cassette:
+    with vcr.use_cassette(str(tmpdir.join("proxy.yaml")), mode="none") as cassette:
         cassette_response = requests.get(httpbin.url, proxies={"http": proxy_server})
 
     assert cassette_response.headers == response.headers
     assert cassette.play_count == 1
+
+
+def test_use_https_proxy(tmpdir, httpbin_secure, proxy_server):
+    """Ensure that it works with an HTTPS proxy."""
+    with vcr.use_cassette(str(tmpdir.join("proxy.yaml"))):
+        response = requests.get(httpbin_secure.url, proxies={"https": proxy_server})
+
+    with vcr.use_cassette(str(tmpdir.join("proxy.yaml")), mode="none") as cassette:
+        cassette_response = requests.get(
+            httpbin_secure.url,
+            proxies={"https": proxy_server},
+        )
+
+    assert cassette_response.headers == response.headers
+    assert cassette.play_count == 1
+
+    # The cassette URL points to httpbin, not the proxy
+    assert cassette.requests[0].url == httpbin_secure.url + "/"

tests/integration/test_record_mode.py

@@ -1,7 +1,10 @@
-import pytest
-import vcr
 from urllib.request import urlopen
 
+import pytest
+
+import vcr
+from vcr.errors import CannotOverwriteExistingCassetteException
+
 
 def test_once_record_mode(tmpdir, httpbin):
     testfile = str(tmpdir.join("recordmode.yml"))
@@ -16,7 +19,7 @@ def test_once_record_mode(tmpdir, httpbin):
         # the first time, it's played from the cassette.
         # but, try to access something else from the same cassette, and an
         # exception is raised.
-        with pytest.raises(Exception):
+        with pytest.raises(CannotOverwriteExistingCassetteException):
             urlopen(httpbin.url + "/get").read()
 
 
@@ -57,7 +60,7 @@ def test_new_episodes_record_mode(tmpdir, httpbin):
         assert cass.all_played
 
         # in the "new_episodes" record mode, we can add more requests to
-        # a cassette without repurcussions.
+        # a cassette without repercussions.
         urlopen(httpbin.url + "/get").read()
 
         # one of the responses has been played
@@ -92,7 +95,7 @@ def test_new_episodes_record_mode_two_times(tmpdir, httpbin):
         assert urlopen(url).read() == original_second_response
         # now that we are back in once mode, this should raise
         # an error.
-        with pytest.raises(Exception):
+        with pytest.raises(CannotOverwriteExistingCassetteException):
             urlopen(url).read()
 
 
@@ -108,7 +111,7 @@ def test_all_record_mode(tmpdir, httpbin):
         urlopen(httpbin.url).read()
 
         # in the "all" record mode, we can add more requests to
-        # a cassette without repurcussions.
+        # a cassette without repercussions.
         urlopen(httpbin.url + "/get").read()
 
         # The cassette was never actually played, even though it existed.
@@ -121,8 +124,10 @@ def test_none_record_mode(tmpdir, httpbin):
     # Cassette file doesn't exist, yet we are trying to make a request.
     # raise hell.
     testfile = str(tmpdir.join("recordmode.yml"))
-    with vcr.use_cassette(testfile, record_mode=vcr.mode.NONE):
-        with pytest.raises(Exception):
+    with (
+        vcr.use_cassette(testfile, record_mode=vcr.mode.NONE),
+        pytest.raises(CannotOverwriteExistingCassetteException),
+    ):
         urlopen(httpbin.url).read()
 
 
@@ -138,5 +143,5 @@ def test_none_record_mode_with_existing_cassette(tmpdir, httpbin):
         urlopen(httpbin.url).read()
         assert cass.play_count == 1
         # but if I try to hit the net, raise an exception.
-        with pytest.raises(Exception):
+        with pytest.raises(CannotOverwriteExistingCassetteException):
             urlopen(httpbin.url + "/get").read()

tests/integration/test_register_matcher.py

@@ -1,6 +1,9 @@
-import vcr
 from urllib.request import urlopen
 
+import pytest
+
+import vcr
+
 
 def true_matcher(r1, r2):
     return True
@@ -10,6 +13,7 @@ def false_matcher(r1, r2):
     return False
 
 
+@pytest.mark.online
 def test_registered_true_matcher(tmpdir, httpbin):
     my_vcr = vcr.VCR()
     my_vcr.register_matcher("true", true_matcher)
@@ -21,10 +25,11 @@ def test_registered_true_matcher(tmpdir, httpbin):
 
     with my_vcr.use_cassette(testfile, match_on=["true"]):
         # I can get the response twice even though I only asked for it once
-        urlopen(httpbin.url + "/get")
-        urlopen(httpbin.url + "/get")
+        urlopen(httpbin.url)
+        urlopen(httpbin.url)
 
 
+@pytest.mark.online
 def test_registered_false_matcher(tmpdir, httpbin):
     my_vcr = vcr.VCR()
     my_vcr.register_matcher("false", false_matcher)

tests/integration/test_register_persister.py

@@ -1,16 +1,17 @@
-# -*- coding: utf-8 -*-
 """Tests for cassettes with custom persistence"""
 
 # External imports
 import os
 from urllib.request import urlopen
 
+import pytest
+
 # Internal imports
 import vcr
-from vcr.persisters.filesystem import FilesystemPersister
+from vcr.persisters.filesystem import CassetteDecodeError, CassetteNotFoundError, FilesystemPersister
 
 
-class CustomFilesystemPersister(object):
+class CustomFilesystemPersister:
     """Behaves just like default FilesystemPersister but adds .test extension
     to the cassette file"""
 
@@ -25,6 +26,19 @@ class CustomFilesystemPersister(object):
         FilesystemPersister.save_cassette(cassette_path, cassette_dict, serializer)
 
 
+class BadPersister(FilesystemPersister):
+    """A bad persister that raises different errors."""
+
+    @staticmethod
+    def load_cassette(cassette_path, serializer):
+        if "nonexistent" in cassette_path:
+            raise CassetteNotFoundError()
+        elif "encoding" in cassette_path:
+            raise CassetteDecodeError()
+        else:
+            raise ValueError("buggy persister")
+
+
 def test_save_cassette_with_custom_persister(tmpdir, httpbin):
     """Ensure you can save a cassette using custom persister"""
     my_vcr = vcr.VCR()
@@ -52,4 +66,22 @@ def test_load_cassette_with_custom_persister(tmpdir, httpbin):
 
     with my_vcr.use_cassette(test_fixture, serializer="json"):
         response = urlopen(httpbin.url).read()
-        assert b"difficult sometimes" in response
+        assert b"HTTP Request & Response Service" in response
+
+
+def test_load_cassette_persister_exception_handling(tmpdir, httpbin):
+    """
+    Ensure expected errors from persister are swallowed while unexpected ones
+    are passed up the call stack.
+    """
+    my_vcr = vcr.VCR()
+    my_vcr.register_persister(BadPersister)
+
+    with my_vcr.use_cassette("bad/nonexistent") as cass:
+        assert len(cass) == 0
+
+    with my_vcr.use_cassette("bad/encoding") as cass:
+        assert len(cass) == 0
+
+    with pytest.raises(ValueError), my_vcr.use_cassette("bad/buggy") as cass:
+        pass

tests/integration/test_request.py

@@ -1,6 +1,7 @@
-import vcr
 from urllib.request import urlopen
 
+import vcr
+
 
 def test_recorded_request_uri_with_redirected_request(tmpdir, httpbin):
     with vcr.use_cassette(str(tmpdir.join("test.yml"))) as cass:

tests/integration/test_requests.py

@@ -1,10 +1,12 @@
 """Test requests' interaction with vcr"""
+
 import pytest
+
 import vcr
-from assertions import assert_cassette_empty, assert_is_json
+
+from ..assertions import assert_cassette_empty, assert_is_json_bytes
 
 requests = pytest.importorskip("requests")
-from requests.exceptions import ConnectionError  # noqa E402
 
 
 def test_status_code(httpbin_both, tmpdir):
@@ -113,22 +115,6 @@ def test_post_chunked_binary(tmpdir, httpbin):
     assert req1 == req2
 
 
-@pytest.mark.skipif("sys.version_info >= (3, 6)", strict=True, raises=ConnectionError)
-def test_post_chunked_binary_secure(tmpdir, httpbin_secure):
-    """Ensure that we can send chunked binary without breaking while trying to concatenate bytes with str."""
-    data1 = iter([b"data", b"to", b"send"])
-    data2 = iter([b"data", b"to", b"send"])
-    url = httpbin_secure.url + "/post"
-    with vcr.use_cassette(str(tmpdir.join("requests.yaml"))):
-        req1 = requests.post(url, data1).content
-        print(req1)
-
-    with vcr.use_cassette(str(tmpdir.join("requests.yaml"))):
-        req2 = requests.post(url, data2).content
-
-    assert req1 == req2
-
-
 def test_redirects(tmpdir, httpbin_both):
     """Ensure that we can handle redirects"""
     url = httpbin_both + "/redirect-to?url=bytes/1024"
@@ -143,6 +129,17 @@ def test_redirects(tmpdir, httpbin_both):
         assert cass.play_count == 2
 
 
+def test_raw_stream(tmpdir, httpbin):
+    expected_response = requests.get(httpbin.url, stream=True)
+    expected_content = b"".join(expected_response.raw.stream())
+
+    for _ in range(2):  # one for recording, one for cassette reply
+        with vcr.use_cassette(str(tmpdir.join("raw_stream.yaml"))):
+            actual_response = requests.get(httpbin.url, stream=True)
+            actual_content = b"".join(actual_response.raw.stream())
+        assert actual_content == expected_content
+
+
 def test_cross_scheme(tmpdir, httpbin_secure, httpbin):
     """Ensure that requests between schemes are treated separately"""
     # First fetch a url under http, and then again under https and then
@@ -155,20 +152,41 @@ def test_cross_scheme(tmpdir, httpbin_secure, httpbin):
         assert len(cass) == 2
 
 
-def test_gzip(tmpdir, httpbin_both):
+def test_gzip__decode_compressed_response_false(tmpdir, httpbin_both):
     """
     Ensure that requests (actually urllib3) is able to automatically decompress
     the response body
     """
+    for _ in range(2):  # one for recording, one for re-playing
+        with vcr.use_cassette(str(tmpdir.join("gzip.yaml"))):
+            response = requests.get(httpbin_both + "/gzip")
+            assert response.headers["content-encoding"] == "gzip"  # i.e. not removed
+            assert_is_json_bytes(response.content)  # i.e. uncompressed bytes
+
+
+def test_gzip__decode_compressed_response_true(tmpdir, httpbin_both):
     url = httpbin_both + "/gzip"
-    response = requests.get(url)
 
-    with vcr.use_cassette(str(tmpdir.join("gzip.yaml"))):
-        response = requests.get(url)
-        assert_is_json(response.content)
+    expected_response = requests.get(url)
+    expected_content = expected_response.content
+    assert expected_response.headers["content-encoding"] == "gzip"  # self-test
 
-    with vcr.use_cassette(str(tmpdir.join("gzip.yaml"))):
-        assert_is_json(response.content)
+    with vcr.use_cassette(
+        str(tmpdir.join("decode_compressed.yaml")),
+        decode_compressed_response=True,
+    ) as cassette:
+        r = requests.get(url)
+        assert r.headers["content-encoding"] == "gzip"  # i.e. not removed
+        assert r.content == expected_content
+
+    # Has the cassette body been decompressed?
+    cassette_response_body = cassette.responses[0]["body"]["string"]
+    assert isinstance(cassette_response_body, str)
+
+    with vcr.use_cassette(str(tmpdir.join("decode_compressed.yaml")), decode_compressed_response=True):
+        r = requests.get(url)
+        assert "content-encoding" not in r.headers  # i.e. removed
+        assert r.content == expected_content
 
 
 def test_session_and_connection_close(tmpdir, httpbin):
@@ -248,7 +266,7 @@ def test_nested_cassettes_with_session_created_before_nesting(httpbin_both, tmpd
 def test_post_file(tmpdir, httpbin_both):
     """Ensure that we handle posting a file."""
     url = httpbin_both + "/post"
-    with vcr.use_cassette(str(tmpdir.join("post_file.yaml"))) as cass, open("tox.ini", "rb") as f:
+    with vcr.use_cassette(str(tmpdir.join("post_file.yaml"))) as cass, open(".editorconfig", "rb") as f:
         original_response = requests.post(url, f).content
 
     # This also tests that we do the right thing with matching the body when they are files.
@@ -256,10 +274,10 @@ def test_post_file(tmpdir, httpbin_both):
         str(tmpdir.join("post_file.yaml")),
         match_on=("method", "scheme", "host", "port", "path", "query", "body"),
     ) as cass:
-        with open("tox.ini", "rb") as f:
-            tox_content = f.read()
-        assert cass.requests[0].body.read() == tox_content
-        with open("tox.ini", "rb") as f:
+        with open(".editorconfig", "rb") as f:
+            editorconfig = f.read()
+        assert cass.requests[0].body.read() == editorconfig
+        with open(".editorconfig", "rb") as f:
             new_response = requests.post(url, f).content
         assert original_response == new_response
 

tests/integration/test_stubs.py

@@ -1,9 +1,10 @@
-import vcr
-import zlib
-import json
 import http.client as httplib
+import json
+import zlib
 
-from assertions import assert_is_json
+import vcr
+
+from ..assertions import assert_is_json_bytes
 
 
 def _headers_are_case_insensitive(host, port):
@@ -64,8 +65,8 @@ def test_original_decoded_response_is_not_modified(tmpdir, httpbin):
         inside = conn.getresponse()
 
         # Assert that we do not modify the original response while appending
-        # to the casssette.
-        assert "gzip" == inside.headers["content-encoding"]
+        # to the cassette.
+        assert inside.headers["content-encoding"] == "gzip"
 
         # They should effectively be the same response.
         inside_headers = (h for h in inside.headers.items() if h[0].lower() != "date")
@@ -83,7 +84,7 @@ def test_original_decoded_response_is_not_modified(tmpdir, httpbin):
         inside = conn.getresponse()
 
         assert "content-encoding" not in inside.headers
-        assert_is_json(inside.read())
+        assert_is_json_bytes(inside.read())
 
 
 def _make_before_record_response(fields, replacement="[REDACTED]"):
@@ -119,9 +120,9 @@ def test_original_response_is_not_modified_by_before_filter(tmpdir, httpbin):
 
         # The scrubbed field should be the same, because no cassette existed.
         # Furthermore, the responses should be identical.
-        inside_body = json.loads(inside.read().decode("utf-8"))
-        outside_body = json.loads(outside.read().decode("utf-8"))
-        assert not inside_body[field_to_scrub] == replacement
+        inside_body = json.loads(inside.read())
+        outside_body = json.loads(outside.read())
+        assert inside_body[field_to_scrub] != replacement
         assert inside_body[field_to_scrub] == outside_body[field_to_scrub]
 
     # Ensure that when a cassette exists, the scrubbed response is returned.
@@ -130,5 +131,5 @@ def test_original_response_is_not_modified_by_before_filter(tmpdir, httpbin):
         conn.request("GET", "/get")
         inside = conn.getresponse()
 
-        inside_body = json.loads(inside.read().decode("utf-8"))
+        inside_body = json.loads(inside.read())
         assert inside_body[field_to_scrub] == replacement

tests/integration/test_tornado.py

@@ -1,33 +1,60 @@
-# -*- coding: utf-8 -*-
 """Test requests' interaction with vcr"""
 
+import asyncio
+import functools
+import inspect
 import json
+import os
+import ssl
 
 import pytest
+
 import vcr
 from vcr.errors import CannotOverwriteExistingCassetteException
 
-from assertions import assert_cassette_empty, assert_is_json
+from ..assertions import assert_cassette_empty, assert_is_json_bytes
 
 tornado = pytest.importorskip("tornado")
+gen = pytest.importorskip("tornado.gen")
 http = pytest.importorskip("tornado.httpclient")
 
 # whether the current version of Tornado supports the raise_error argument for
 # fetch().
 supports_raise_error = tornado.version_info >= (4,)
+raise_error_for_response_code_only = tornado.version_info >= (6,)
+
+
+def gen_test(func):
+    @functools.wraps(func)
+    def wrapper(*args, **kwargs):
+        async def coro():
+            return await gen.coroutine(func)(*args, **kwargs)
+
+        return asyncio.run(coro())
+
+    # Patch the signature so pytest can inject fixtures
+    # we can't use wrapt.decorator because it returns a generator function
+    wrapper.__signature__ = inspect.signature(func)
+    return wrapper
 
 
 @pytest.fixture(params=["simple", "curl", "default"])
 def get_client(request):
+    ca_bundle_path = os.environ.get("REQUESTS_CA_BUNDLE")
+    ssl_ctx = ssl.create_default_context(ssl.Purpose.SERVER_AUTH)
+    ssl_ctx.load_verify_locations(cafile=ca_bundle_path)
+    ssl_ctx.verify_mode = ssl.CERT_REQUIRED
+
     if request.param == "simple":
         from tornado import simple_httpclient as simple
 
-        return lambda: simple.SimpleAsyncHTTPClient()
-    elif request.param == "curl":
+        return lambda: simple.SimpleAsyncHTTPClient(defaults={"ssl_options": ssl_ctx})
+
+    if request.param == "curl":
         curl = pytest.importorskip("tornado.curl_httpclient")
-        return lambda: curl.CurlAsyncHTTPClient()
-    else:
-        return lambda: http.AsyncHTTPClient()
+        return lambda: curl.CurlAsyncHTTPClient(defaults={"ca_certs": ca_bundle_path})
+
+    return lambda: http.AsyncHTTPClient(defaults={"ssl_options": ssl_ctx})
 
 
 def get(client, url, **kwargs):
@@ -44,67 +71,65 @@ def post(client, url, data=None, **kwargs):
     return client.fetch(http.HTTPRequest(url, method="POST", **kwargs))
 
 
-@pytest.fixture(params=["https", "http"])
-def scheme(request):
-    """Fixture that returns both http and https."""
-    return request.param
-
-
-@pytest.mark.gen_test
-def test_status_code(get_client, scheme, tmpdir):
+@pytest.mark.online
+@gen_test
+def test_status_code(get_client, tmpdir, httpbin_both):
     """Ensure that we can read the status code"""
-    url = scheme + "://httpbin.org/"
+    url = httpbin_both.url
     with vcr.use_cassette(str(tmpdir.join("atts.yaml"))):
         status_code = (yield get(get_client(), url)).code
 
     with vcr.use_cassette(str(tmpdir.join("atts.yaml"))) as cass:
         assert status_code == (yield get(get_client(), url)).code
-        assert 1 == cass.play_count
+        assert cass.play_count == 1
 
 
-@pytest.mark.gen_test
-def test_headers(get_client, scheme, tmpdir):
+@pytest.mark.online
+@gen_test
+def test_headers(get_client, httpbin_both, tmpdir):
     """Ensure that we can read the headers back"""
-    url = scheme + "://httpbin.org/"
+    url = httpbin_both.url
     with vcr.use_cassette(str(tmpdir.join("headers.yaml"))):
         headers = (yield get(get_client(), url)).headers
 
     with vcr.use_cassette(str(tmpdir.join("headers.yaml"))) as cass:
         assert headers == (yield get(get_client(), url)).headers
-        assert 1 == cass.play_count
+        assert cass.play_count == 1
 
 
-@pytest.mark.gen_test
-def test_body(get_client, tmpdir, scheme):
+@pytest.mark.online
+@gen_test
+def test_body(get_client, tmpdir, httpbin_both):
     """Ensure the responses are all identical enough"""
 
-    url = scheme + "://httpbin.org/bytes/1024"
+    url = httpbin_both.url + "/bytes/1024"
     with vcr.use_cassette(str(tmpdir.join("body.yaml"))):
         content = (yield get(get_client(), url)).body
 
     with vcr.use_cassette(str(tmpdir.join("body.yaml"))) as cass:
         assert content == (yield get(get_client(), url)).body
-        assert 1 == cass.play_count
+        assert cass.play_count == 1
 
 
-@pytest.mark.gen_test
-def test_effective_url(get_client, scheme, tmpdir):
+@gen_test
+def test_effective_url(get_client, tmpdir, httpbin):
     """Ensure that the effective_url is captured"""
-    url = scheme + "://mockbin.org/redirect/301?url=/html"
+    url = httpbin.url + "/redirect/1"
     with vcr.use_cassette(str(tmpdir.join("url.yaml"))):
         effective_url = (yield get(get_client(), url)).effective_url
-        assert effective_url == scheme + "://mockbin.org/redirect/301/0"
+        assert effective_url == httpbin.url + "/get"
 
     with vcr.use_cassette(str(tmpdir.join("url.yaml"))) as cass:
         assert effective_url == (yield get(get_client(), url)).effective_url
-        assert 1 == cass.play_count
+        assert cass.play_count == 1
 
 
-@pytest.mark.gen_test
-def test_auth(get_client, tmpdir, scheme):
+@pytest.mark.online
+@gen_test
+def test_auth(get_client, tmpdir, httpbin_both):
     """Ensure that we can handle basic auth"""
     auth = ("user", "passwd")
-    url = scheme + "://httpbin.org/basic-auth/user/passwd"
+    url = httpbin_both.url + "/basic-auth/user/passwd"
     with vcr.use_cassette(str(tmpdir.join("auth.yaml"))):
         one = yield get(get_client(), url, auth_username=auth[0], auth_password=auth[1])
 
@@ -112,14 +137,15 @@ def test_auth(get_client, tmpdir, scheme):
         two = yield get(get_client(), url, auth_username=auth[0], auth_password=auth[1])
         assert one.body == two.body
         assert one.code == two.code
-        assert 1 == cass.play_count
+        assert cass.play_count == 1
 
 
-@pytest.mark.gen_test
-def test_auth_failed(get_client, tmpdir, scheme):
+@pytest.mark.online
+@gen_test
+def test_auth_failed(get_client, tmpdir, httpbin_both):
     """Ensure that we can save failed auth statuses"""
     auth = ("user", "wrongwrongwrong")
-    url = scheme + "://httpbin.org/basic-auth/user/passwd"
+    url = httpbin_both.url + "/basic-auth/user/passwd"
     with vcr.use_cassette(str(tmpdir.join("auth-failed.yaml"))) as cass:
         # Ensure that this is empty to begin with
         assert_cassette_empty(cass)
@@ -135,14 +161,15 @@ def test_auth_failed(get_client, tmpdir, scheme):
         assert exc_info.value.code == 401
         assert one.body == two.body
         assert one.code == two.code == 401
-        assert 1 == cass.play_count
+        assert cass.play_count == 1
 
 
-@pytest.mark.gen_test
-def test_post(get_client, tmpdir, scheme):
+@pytest.mark.online
+@gen_test
+def test_post(get_client, tmpdir, httpbin_both):
     """Ensure that we can post and cache the results"""
     data = {"key1": "value1", "key2": "value2"}
-    url = scheme + "://httpbin.org/post"
+    url = httpbin_both.url + "/post"
     with vcr.use_cassette(str(tmpdir.join("requests.yaml"))):
         req1 = (yield post(get_client(), url, data)).body
 
@@ -150,13 +177,13 @@ def test_post(get_client, tmpdir, scheme):
         req2 = (yield post(get_client(), url, data)).body
 
     assert req1 == req2
-    assert 1 == cass.play_count
+    assert cass.play_count == 1
 
 
-@pytest.mark.gen_test
-def test_redirects(get_client, tmpdir, scheme):
+@gen_test
+def test_redirects(get_client, tmpdir, httpbin):
     """Ensure that we can handle redirects"""
-    url = scheme + "://mockbin.org/redirect/301?url=bytes/1024"
+    url = httpbin + "/redirect-to?url=bytes/1024&status_code=301"
     with vcr.use_cassette(str(tmpdir.join("requests.yaml"))):
         content = (yield get(get_client(), url)).body
 
@@ -165,32 +192,38 @@ def test_redirects(get_client, tmpdir, scheme):
         assert cass.play_count == 1
 
 
-@pytest.mark.gen_test
-def test_cross_scheme(get_client, tmpdir, scheme):
+@pytest.mark.online
+@gen_test
+def test_cross_scheme(get_client, tmpdir, httpbin, httpbin_secure):
     """Ensure that requests between schemes are treated separately"""
     # First fetch a url under http, and then again under https and then
     # ensure that we haven't served anything out of cache, and we have two
     # requests / response pairs in the cassette
+
+    url = httpbin.url
+    url_secure = httpbin_secure.url
+
     with vcr.use_cassette(str(tmpdir.join("cross_scheme.yaml"))) as cass:
-        yield get(get_client(), "https://httpbin.org/")
-        yield get(get_client(), "http://httpbin.org/")
+        yield get(get_client(), url)
+        yield get(get_client(), url_secure)
         assert cass.play_count == 0
         assert len(cass) == 2
 
     # Then repeat the same requests and ensure both were replayed.
     with vcr.use_cassette(str(tmpdir.join("cross_scheme.yaml"))) as cass:
-        yield get(get_client(), "https://httpbin.org/")
-        yield get(get_client(), "http://httpbin.org/")
+        yield get(get_client(), url)
+        yield get(get_client(), url_secure)
         assert cass.play_count == 2
 
 
-@pytest.mark.gen_test
-def test_gzip(get_client, tmpdir, scheme):
+@pytest.mark.online
+@gen_test
+def test_gzip(get_client, tmpdir, httpbin_both):
     """
     Ensure that httpclient is able to automatically decompress the response
     body
     """
-    url = scheme + "://httpbin.org/gzip"
+    url = httpbin_both + "/gzip"
 
     # use_gzip was renamed to decompress_response in 4.0
     kwargs = {}
@@ -201,36 +234,39 @@ def test_gzip(get_client, tmpdir, scheme):
 
     with vcr.use_cassette(str(tmpdir.join("gzip.yaml"))):
         response = yield get(get_client(), url, **kwargs)
-        assert_is_json(response.body)
+        assert_is_json_bytes(response.body)
 
     with vcr.use_cassette(str(tmpdir.join("gzip.yaml"))) as cass:
         response = yield get(get_client(), url, **kwargs)
-        assert_is_json(response.body)
-        assert 1 == cass.play_count
+        assert_is_json_bytes(response.body)
+        assert cass.play_count == 1
 
 
-@pytest.mark.gen_test
-def test_https_with_cert_validation_disabled(get_client, tmpdir):
+@pytest.mark.online
+@gen_test
+def test_https_with_cert_validation_disabled(get_client, tmpdir, httpbin_secure):
     cass_path = str(tmpdir.join("cert_validation_disabled.yaml"))
 
+    url = httpbin_secure.url
+
     with vcr.use_cassette(cass_path):
-        yield get(get_client(), "https://httpbin.org", validate_cert=False)
+        yield get(get_client(), url, validate_cert=False)
 
     with vcr.use_cassette(cass_path) as cass:
-        yield get(get_client(), "https://httpbin.org", validate_cert=False)
-        assert 1 == cass.play_count
+        yield get(get_client(), url, validate_cert=False)
+        assert cass.play_count == 1
 
 
-@pytest.mark.gen_test
-def test_unsupported_features_raises_in_future(get_client, tmpdir):
+@gen_test
+def test_unsupported_features_raises_in_future(get_client, tmpdir, httpbin):
     """Ensure that the exception for an AsyncHTTPClient feature not being
     supported is raised inside the future."""
 
     def callback(chunk):
-        assert False, "Did not expect to be called."
+        raise AssertionError("Did not expect to be called.")
 
     with vcr.use_cassette(str(tmpdir.join("invalid.yaml"))):
-        future = get(get_client(), "http://httpbin.org", streaming_callback=callback)
+        future = get(get_client(), httpbin.url, streaming_callback=callback)
 
     with pytest.raises(Exception) as excinfo:
         yield future
@@ -239,60 +275,76 @@ def test_unsupported_features_raises_in_future(get_client, tmpdir):
 
 
 @pytest.mark.skipif(not supports_raise_error, reason="raise_error unavailable in tornado <= 3")
-@pytest.mark.gen_test
+@pytest.mark.skipif(
+    raise_error_for_response_code_only,
+    reason="raise_error only ignores HTTPErrors due to response code",
+)
+@gen_test
 def test_unsupported_features_raise_error_disabled(get_client, tmpdir):
     """Ensure that the exception for an AsyncHTTPClient feature not being
     supported is not raised if raise_error=False."""
 
     def callback(chunk):
-        assert False, "Did not expect to be called."
+        raise AssertionError("Did not expect to be called.")
 
     with vcr.use_cassette(str(tmpdir.join("invalid.yaml"))):
         response = yield get(
-            get_client(), "http://httpbin.org", streaming_callback=callback, raise_error=False
+            get_client(),
+            "http://httpbin.org",
+            streaming_callback=callback,
+            raise_error=False,
         )
 
     assert "not yet supported by VCR" in str(response.error)
 
 
-@pytest.mark.gen_test
-def test_cannot_overwrite_cassette_raises_in_future(get_client, tmpdir):
+@pytest.mark.online
+@gen_test
+def test_cannot_overwrite_cassette_raises_in_future(get_client, tmpdir, httpbin):
     """Ensure that CannotOverwriteExistingCassetteException is raised inside
     the future."""
 
-    with vcr.use_cassette(str(tmpdir.join("overwrite.yaml"))):
-        yield get(get_client(), "http://httpbin.org/get")
+    url = httpbin.url
 
     with vcr.use_cassette(str(tmpdir.join("overwrite.yaml"))):
-        future = get(get_client(), "http://httpbin.org/headers")
+        yield get(get_client(), url + "/get")
+
+    with vcr.use_cassette(str(tmpdir.join("overwrite.yaml"))):
+        future = get(get_client(), url + "/headers")
 
     with pytest.raises(CannotOverwriteExistingCassetteException):
         yield future
 
 
 @pytest.mark.skipif(not supports_raise_error, reason="raise_error unavailable in tornado <= 3")
-@pytest.mark.gen_test
-def test_cannot_overwrite_cassette_raise_error_disabled(get_client, tmpdir):
+@pytest.mark.skipif(
+    raise_error_for_response_code_only,
+    reason="raise_error only ignores HTTPErrors due to response code",
+)
+@gen_test
+def test_cannot_overwrite_cassette_raise_error_disabled(get_client, tmpdir, httpbin):
     """Ensure that CannotOverwriteExistingCassetteException is not raised if
     raise_error=False in the fetch() call."""
 
-    with vcr.use_cassette(str(tmpdir.join("overwrite.yaml"))):
-        yield get(get_client(), "http://httpbin.org/get", raise_error=False)
+    url = httpbin.url
 
     with vcr.use_cassette(str(tmpdir.join("overwrite.yaml"))):
-        response = yield get(get_client(), "http://httpbin.org/headers", raise_error=False)
+        yield get(get_client(), url + "/get", raise_error=False)
+
+    with vcr.use_cassette(str(tmpdir.join("overwrite.yaml"))):
+        response = yield get(get_client(), url + "/headers", raise_error=False)
 
     assert isinstance(response.error, CannotOverwriteExistingCassetteException)
 
 
-@pytest.mark.gen_test
+@gen_test
 @vcr.use_cassette(path_transformer=vcr.default_vcr.ensure_suffix(".yaml"))
 def test_tornado_with_decorator_use_cassette(get_client):
     response = yield get_client().fetch(http.HTTPRequest("http://www.google.com/", method="GET"))
     assert response.body.decode("utf-8") == "not actually google"
 
 
-@pytest.mark.gen_test
+@gen_test
 @vcr.use_cassette(path_transformer=vcr.default_vcr.ensure_suffix(".yaml"))
 def test_tornado_exception_can_be_caught(get_client):
     try:
@@ -306,45 +358,53 @@ def test_tornado_exception_can_be_caught(get_client):
         assert e.code == 404
 
 
-@pytest.mark.gen_test
-def test_existing_references_get_patched(tmpdir):
+@pytest.mark.online
+@gen_test
+def test_existing_references_get_patched(tmpdir, httpbin):
     from tornado.httpclient import AsyncHTTPClient
 
+    url = httpbin.url + "/get"
+
     with vcr.use_cassette(str(tmpdir.join("data.yaml"))):
         client = AsyncHTTPClient()
-        yield get(client, "http://httpbin.org/get")
+        yield get(client, url)
 
     with vcr.use_cassette(str(tmpdir.join("data.yaml"))) as cass:
-        yield get(client, "http://httpbin.org/get")
+        yield get(client, url)
         assert cass.play_count == 1
 
 
-@pytest.mark.gen_test
-def test_existing_instances_get_patched(get_client, tmpdir):
+@pytest.mark.online
+@gen_test
+def test_existing_instances_get_patched(get_client, tmpdir, httpbin):
     """Ensure that existing instances of AsyncHTTPClient get patched upon
     entering VCR context."""
 
+    url = httpbin.url + "/get"
     client = get_client()
 
     with vcr.use_cassette(str(tmpdir.join("data.yaml"))):
-        yield get(client, "http://httpbin.org/get")
+        yield get(client, url)
 
     with vcr.use_cassette(str(tmpdir.join("data.yaml"))) as cass:
-        yield get(client, "http://httpbin.org/get")
+        yield get(client, url)
         assert cass.play_count == 1
 
 
-@pytest.mark.gen_test
-def test_request_time_is_set(get_client, tmpdir):
+@pytest.mark.online
+@gen_test
+def test_request_time_is_set(get_client, tmpdir, httpbin):
     """Ensures that the request_time on HTTPResponses is set."""
 
+    url = httpbin.url + "/get"
+
     with vcr.use_cassette(str(tmpdir.join("data.yaml"))):
         client = get_client()
-        response = yield get(client, "http://httpbin.org/get")
+        response = yield get(client, url)
         assert response.request_time is not None
 
     with vcr.use_cassette(str(tmpdir.join("data.yaml"))) as cass:
         client = get_client()
-        response = yield get(client, "http://httpbin.org/get")
+        response = yield get(client, url)
         assert response.request_time is not None
         assert cass.play_count == 1

tests/integration/test_urllib2.py

@@ -1,145 +0,0 @@
-# -*- coding: utf-8 -*-
-"""Integration tests with urllib2"""
-
-import ssl
-from urllib.request import urlopen
-from urllib.parse import urlencode
-import pytest_httpbin.certs
-
-# Internal imports
-import vcr
-
-from assertions import assert_cassette_has_one_response
-
-
-def urlopen_with_cafile(*args, **kwargs):
-    context = ssl.create_default_context(cafile=pytest_httpbin.certs.where())
-    context.check_hostname = False
-    kwargs["context"] = context
-    try:
-        return urlopen(*args, **kwargs)
-    except TypeError:
-        # python2/pypi don't let us override this
-        del kwargs["cafile"]
-        return urlopen(*args, **kwargs)
-
-
-def test_response_code(httpbin_both, tmpdir):
-    """Ensure we can read a response code from a fetch"""
-    url = httpbin_both.url
-    with vcr.use_cassette(str(tmpdir.join("atts.yaml"))):
-        code = urlopen_with_cafile(url).getcode()
-
-    with vcr.use_cassette(str(tmpdir.join("atts.yaml"))):
-        assert code == urlopen_with_cafile(url).getcode()
-
-
-def test_random_body(httpbin_both, tmpdir):
-    """Ensure we can read the content, and that it's served from cache"""
-    url = httpbin_both.url + "/bytes/1024"
-    with vcr.use_cassette(str(tmpdir.join("body.yaml"))):
-        body = urlopen_with_cafile(url).read()
-
-    with vcr.use_cassette(str(tmpdir.join("body.yaml"))):
-        assert body == urlopen_with_cafile(url).read()
-
-
-def test_response_headers(httpbin_both, tmpdir):
-    """Ensure we can get information from the response"""
-    url = httpbin_both.url
-    with vcr.use_cassette(str(tmpdir.join("headers.yaml"))):
-        open1 = urlopen_with_cafile(url).info().items()
-
-    with vcr.use_cassette(str(tmpdir.join("headers.yaml"))):
-        open2 = urlopen_with_cafile(url).info().items()
-
-        assert sorted(open1) == sorted(open2)
-
-
-def test_effective_url(tmpdir):
-    """Ensure that the effective_url is captured"""
-    url = "http://mockbin.org/redirect/301"
-
-    with vcr.use_cassette(str(tmpdir.join("headers.yaml"))):
-        effective_url = urlopen_with_cafile(url).geturl()
-        assert effective_url == "http://mockbin.org/redirect/301/0"
-
-    with vcr.use_cassette(str(tmpdir.join("headers.yaml"))):
-        assert effective_url == urlopen_with_cafile(url).geturl()
-
-
-def test_multiple_requests(httpbin_both, tmpdir):
-    """Ensure that we can cache multiple requests"""
-    urls = [httpbin_both.url, httpbin_both.url, httpbin_both.url + "/get", httpbin_both.url + "/bytes/1024"]
-    with vcr.use_cassette(str(tmpdir.join("multiple.yaml"))) as cass:
-        [urlopen_with_cafile(url) for url in urls]
-    assert len(cass) == len(urls)
-
-
-def test_get_data(httpbin_both, tmpdir):
-    """Ensure that it works with query data"""
-    data = urlencode({"some": 1, "data": "here"})
-    url = httpbin_both.url + "/get?" + data
-    with vcr.use_cassette(str(tmpdir.join("get_data.yaml"))):
-        res1 = urlopen_with_cafile(url).read()
-
-    with vcr.use_cassette(str(tmpdir.join("get_data.yaml"))):
-        res2 = urlopen_with_cafile(url).read()
-    assert res1 == res2
-
-
-def test_post_data(httpbin_both, tmpdir):
-    """Ensure that it works when posting data"""
-    data = urlencode({"some": 1, "data": "here"}).encode("utf-8")
-    url = httpbin_both.url + "/post"
-    with vcr.use_cassette(str(tmpdir.join("post_data.yaml"))):
-        res1 = urlopen_with_cafile(url, data).read()
-
-    with vcr.use_cassette(str(tmpdir.join("post_data.yaml"))) as cass:
-        res2 = urlopen_with_cafile(url, data).read()
-        assert len(cass) == 1
-
-    assert res1 == res2
-    assert_cassette_has_one_response(cass)
-
-
-def test_post_unicode_data(httpbin_both, tmpdir):
-    """Ensure that it works when posting unicode data"""
-    data = urlencode({"snowman": "☃".encode()}).encode("utf-8")
-    url = httpbin_both.url + "/post"
-    with vcr.use_cassette(str(tmpdir.join("post_data.yaml"))):
-        res1 = urlopen_with_cafile(url, data).read()
-
-    with vcr.use_cassette(str(tmpdir.join("post_data.yaml"))) as cass:
-        res2 = urlopen_with_cafile(url, data).read()
-        assert len(cass) == 1
-
-    assert res1 == res2
-    assert_cassette_has_one_response(cass)
-
-
-def test_cross_scheme(tmpdir, httpbin_secure, httpbin):
-    """Ensure that requests between schemes are treated separately"""
-    # First fetch a url under https, and then again under https and then
-    # ensure that we haven't served anything out of cache, and we have two
-    # requests / response pairs in the cassette
-    with vcr.use_cassette(str(tmpdir.join("cross_scheme.yaml"))) as cass:
-        urlopen_with_cafile(httpbin_secure.url)
-        urlopen_with_cafile(httpbin.url)
-        assert len(cass) == 2
-        assert cass.play_count == 0
-
-
-def test_decorator(httpbin_both, tmpdir):
-    """Test the decorator version of VCR.py"""
-    url = httpbin_both.url
-
-    @vcr.use_cassette(str(tmpdir.join("atts.yaml")))
-    def inner1():
-        return urlopen_with_cafile(url).getcode()
-
-    @vcr.use_cassette(str(tmpdir.join("atts.yaml")))
-    def inner2():
-        return urlopen_with_cafile(url).getcode()
-
-    assert inner1() == inner2()

tests/integration/test_urllib3.py

@@ -4,9 +4,12 @@
 
 import pytest
 import pytest_httpbin
+
 import vcr
 from vcr.patch import force_reset
-from assertions import assert_cassette_empty, assert_is_json
+from vcr.stubs.compat import get_headers
+
+from ..assertions import assert_cassette_empty, assert_is_json_bytes
 
 urllib3 = pytest.importorskip("urllib3")
 
@@ -14,7 +17,8 @@ urllib3 = pytest.importorskip("urllib3")
 @pytest.fixture(scope="module")
 def verify_pool_mgr():
     return urllib3.PoolManager(
-        cert_reqs="CERT_REQUIRED", ca_certs=pytest_httpbin.certs.where()  # Force certificate check.
+        cert_reqs="CERT_REQUIRED",
+        ca_certs=pytest_httpbin.certs.where(),  # Force certificate check.
     )
 
 
@@ -40,7 +44,8 @@ def test_headers(tmpdir, httpbin_both, verify_pool_mgr):
         headers = verify_pool_mgr.request("GET", url).headers
 
     with vcr.use_cassette(str(tmpdir.join("headers.yaml"))):
-        assert headers == verify_pool_mgr.request("GET", url).headers
+        new_headers = verify_pool_mgr.request("GET", url).headers
+        assert sorted(get_headers(headers)) == sorted(get_headers(new_headers))
 
 
 def test_body(tmpdir, httpbin_both, verify_pool_mgr):
@@ -94,9 +99,10 @@ def test_post(tmpdir, httpbin_both, verify_pool_mgr):
     assert req1 == req2
 
 
-def test_redirects(tmpdir, verify_pool_mgr):
+@pytest.mark.online
+def test_redirects(tmpdir, verify_pool_mgr, httpbin):
     """Ensure that we can handle redirects"""
-    url = "http://mockbin.org/redirect/301"
+    url = httpbin.url + "/redirect/1"
 
     with vcr.use_cassette(str(tmpdir.join("verify_pool_mgr.yaml"))):
         content = verify_pool_mgr.request("GET", url).data
@@ -132,10 +138,10 @@ def test_gzip(tmpdir, httpbin_both, verify_pool_mgr):
 
     with vcr.use_cassette(str(tmpdir.join("gzip.yaml"))):
         response = verify_pool_mgr.request("GET", url)
-        assert_is_json(response.data)
+        assert_is_json_bytes(response.data)
 
     with vcr.use_cassette(str(tmpdir.join("gzip.yaml"))):
-        assert_is_json(response.data)
+        assert_is_json_bytes(response.data)
 
 
 def test_https_with_cert_validation_disabled(tmpdir, httpbin_secure, pool_mgr):
@@ -144,18 +150,18 @@ def test_https_with_cert_validation_disabled(tmpdir, httpbin_secure, pool_mgr):
 
 
 def test_urllib3_force_reset():
-    cpool = urllib3.connectionpool
-    http_original = cpool.HTTPConnection
-    https_original = cpool.HTTPSConnection
-    verified_https_original = cpool.VerifiedHTTPSConnection
+    conn = urllib3.connection
+    http_original = conn.HTTPConnection
+    https_original = conn.HTTPSConnection
+    verified_https_original = conn.VerifiedHTTPSConnection
     with vcr.use_cassette(path="test"):
-        first_cassette_HTTPConnection = cpool.HTTPConnection
-        first_cassette_HTTPSConnection = cpool.HTTPSConnection
-        first_cassette_VerifiedHTTPSConnection = cpool.VerifiedHTTPSConnection
+        first_cassette_HTTPConnection = conn.HTTPConnection
+        first_cassette_HTTPSConnection = conn.HTTPSConnection
+        first_cassette_VerifiedHTTPSConnection = conn.VerifiedHTTPSConnection
         with force_reset():
-            assert cpool.HTTPConnection is http_original
-            assert cpool.HTTPSConnection is https_original
-            assert cpool.VerifiedHTTPSConnection is verified_https_original
-        assert cpool.HTTPConnection is first_cassette_HTTPConnection
-        assert cpool.HTTPSConnection is first_cassette_HTTPSConnection
-        assert cpool.VerifiedHTTPSConnection is first_cassette_VerifiedHTTPSConnection
+            assert conn.HTTPConnection is http_original
+            assert conn.HTTPSConnection is https_original
+            assert conn.VerifiedHTTPSConnection is verified_https_original
+        assert conn.HTTPConnection is first_cassette_HTTPConnection
+        assert conn.HTTPSConnection is first_cassette_HTTPSConnection
+        assert conn.VerifiedHTTPSConnection is first_cassette_VerifiedHTTPSConnection

tests/integration/test_wild.py

@@ -1,12 +1,13 @@
 import http.client as httplib
 import multiprocessing
-import pytest
 from xmlrpc.client import ServerProxy
 from xmlrpc.server import SimpleXMLRPCServer
 
-requests = pytest.importorskip("requests")
+import pytest
 
-import vcr  # NOQA
+import vcr
+
+requests = pytest.importorskip("requests")
 
 
 def test_domain_redirect():
@@ -51,6 +52,7 @@ def test_flickr_multipart_upload(httpbin, tmpdir):
         assert cass.play_count == 1
 
 
+@pytest.mark.online
 def test_flickr_should_respond_with_200(tmpdir):
     testfile = str(tmpdir.join("flickr.yml"))
     with vcr.use_cassette(testfile):
@@ -60,14 +62,15 @@ def test_flickr_should_respond_with_200(tmpdir):
 
 def test_cookies(tmpdir, httpbin):
     testfile = str(tmpdir.join("cookies.yml"))
-    with vcr.use_cassette(testfile):
-        s = requests.Session()
+    with vcr.use_cassette(testfile), requests.Session() as s:
         s.get(httpbin.url + "/cookies/set?k1=v1&k2=v2")
+        assert s.cookies.keys() == ["k1", "k2"]
 
         r2 = s.get(httpbin.url + "/cookies")
-        assert len(r2.json()["cookies"]) == 2
+        assert sorted(r2.json()["cookies"].keys()) == ["k1", "k2"]
 
 
+@pytest.mark.online
 def test_amazon_doctype(tmpdir):
     # amazon gzips its homepage.  For some reason, in requests 2.7, it's not
     # getting gunzipped.
@@ -83,7 +86,7 @@ def start_rpc_server(q):
     httpd.serve_forever()
 
 
-@pytest.yield_fixture(scope="session")
+@pytest.fixture(scope="session")
 def rpc_server():
     q = multiprocessing.Queue()
     proxy_process = multiprocessing.Process(target=start_rpc_server, args=(q,))

tests/unit/test_cassettes.py

@@ -7,9 +7,11 @@ from unittest import mock
 
 import pytest
 import yaml
+
 from vcr.cassette import Cassette
 from vcr.errors import UnhandledHTTPRequestError
 from vcr.patch import force_reset
+from vcr.request import Request
 from vcr.stubs import VCRHTTPSConnection
 
 
@@ -19,15 +21,31 @@ def test_cassette_load(tmpdir):
         yaml.dump(
             {
                 "interactions": [
-                    {"request": {"body": "", "uri": "foo", "method": "GET", "headers": {}}, "response": "bar"}
-                ]
-            }
-        )
+                    {
+                        "request": {"body": "", "uri": "foo", "method": "GET", "headers": {}},
+                        "response": "bar",
+                    },
+                ],
+            },
+        ),
     )
     a_cassette = Cassette.load(path=str(a_file))
     assert len(a_cassette) == 1
 
 
+def test_cassette_load_nonexistent():
+    a_cassette = Cassette.load(path="something/nonexistent.yml")
+    assert len(a_cassette) == 0
+
+
+def test_cassette_load_invalid_encoding(tmpdir):
+    a_file = tmpdir.join("invalid_encoding.yml")
+    with open(a_file, "wb") as fd:
+        fd.write(b"\xda")
+    a_cassette = Cassette.load(path=str(a_file))
+    assert len(a_cassette) == 0
+
+
 def test_cassette_not_played():
     a = Cassette("test")
     assert not a.play_count
@@ -96,7 +114,7 @@ def make_get_request():
 @mock.patch("vcr.stubs.VCRHTTPResponse")
 def test_function_decorated_with_use_cassette_can_be_invoked_multiple_times(*args):
     decorated_function = Cassette.use(path="test")(make_get_request)
-    for i in range(4):
+    for _ in range(4):
         decorated_function()
 
 
@@ -142,7 +160,7 @@ def test_cassette_allow_playback_repeats():
     a = Cassette("test", allow_playback_repeats=True)
     a.append("foo", "bar")
     a.append("other", "resp")
-    for x in range(10):
+    for _ in range(10):
         assert a.play_response("foo") == "bar"
     assert a.play_count == 10
     assert a.all_played is False
@@ -204,13 +222,15 @@ def test_nesting_cassette_context_managers(*args):
     with contextlib.ExitStack() as exit_stack:
         first_cassette = exit_stack.enter_context(Cassette.use(path="test"))
         exit_stack.enter_context(
-            mock.patch.object(first_cassette, "play_response", return_value=first_response)
+            mock.patch.object(first_cassette, "play_response", return_value=first_response),
         )
         assert_get_response_body_is("first_response")
 
         # Make sure a second cassette can supersede the first
-        with Cassette.use(path="test") as second_cassette:
-            with mock.patch.object(second_cassette, "play_response", return_value=second_response):
+        with (
+            Cassette.use(path="test") as second_cassette,
+            mock.patch.object(second_cassette, "play_response", return_value=second_response),
+        ):
             assert_get_response_body_is("second_response")
 
         # Now the first cassette should be back in effect
@@ -393,3 +413,25 @@ def test_find_requests_with_most_matches_many_similar_requests(mock_get_matchers
         (1, ["method", "path"], [("query", "failed : query")]),
         (3, ["method", "path"], [("query", "failed : query")]),
     ]
+
+
+def test_used_interactions(tmpdir):
+    interactions = [
+        {"request": {"body": "", "uri": "foo1", "method": "GET", "headers": {}}, "response": "bar1"},
+        {"request": {"body": "", "uri": "foo2", "method": "GET", "headers": {}}, "response": "bar2"},
+        {"request": {"body": "", "uri": "foo3", "method": "GET", "headers": {}}, "response": "bar3"},
+    ]
+    file = tmpdir.join("test_cassette.yml")
+    file.write(yaml.dump({"interactions": [interactions[0], interactions[1]]}))
+
+    cassette = Cassette.load(path=str(file))
+    request = Request._from_dict(interactions[1]["request"])
+    cassette.play_response(request)
+    assert len(cassette._played_interactions) < len(cassette._old_interactions)
+
+    request = Request._from_dict(interactions[2]["request"])
+    cassette.append(request, interactions[2]["response"])
+    assert len(cassette._new_interactions()) == 1
+
+    used_interactions = cassette._played_interactions + cassette._new_interactions()
+    assert len(used_interactions) == 2

tests/unit/test_errors.py

@@ -55,15 +55,18 @@ from vcr.cassette import Cassette
     ],
 )
 def test_CannotOverwriteExistingCassetteException_get_message(
-    mock_find_requests_with_most_matches, most_matches, expected_message
+    mock_find_requests_with_most_matches,
+    most_matches,
+    expected_message,
 ):
     mock_find_requests_with_most_matches.return_value = most_matches
     cassette = Cassette("path")
     failed_request = "request"
     exception_message = errors.CannotOverwriteExistingCassetteException._get_message(cassette, "request")
     expected = (
-        "Can't overwrite existing cassette (%r) in your current record mode (%r).\n"
-        "No match for the request (%r) was found.\n"
-        "%s" % (cassette._path, cassette.record_mode, failed_request, expected_message)
+        f"Can't overwrite existing cassette ({cassette._path!r}) "
+        f"in your current record mode ({cassette.record_mode!r}).\n"
+        f"No match for the request ({failed_request!r}) was found.\n"
+        f"{expected_message}"
     )
     assert exception_message == expected

tests/unit/test_filters.py

@@ -1,18 +1,19 @@
-from io import BytesIO
-from vcr.filters import (
-    remove_headers,
-    replace_headers,
-    remove_query_parameters,
-    replace_query_parameters,
-    remove_post_data_parameters,
-    replace_post_data_parameters,
-    decode_response,
-)
-from vcr.request import Request
 import gzip
 import json
-from unittest import mock
 import zlib
+from io import BytesIO
+from unittest import mock
+
+from vcr.filters import (
+    decode_response,
+    remove_headers,
+    remove_post_data_parameters,
+    remove_query_parameters,
+    replace_headers,
+    replace_post_data_parameters,
+    replace_query_parameters,
+)
+from vcr.request import Request
 
 
 def test_replace_headers():
@@ -196,7 +197,7 @@ def test_replace_json_post_data_parameters():
             ("six", "doesntexist"),
         ],
     )
-    request_data = json.loads(request.body.decode("utf-8"))
+    request_data = json.loads(request.body)
     expected_data = json.loads('{"one": "keep", "three": "tada", "four": "SHOUT"}')
     assert request_data == expected_data
 
@@ -207,8 +208,8 @@ def test_remove_json_post_data_parameters():
     request = Request("POST", "http://google.com", body, {})
     request.headers["Content-Type"] = "application/json"
     remove_post_data_parameters(request, ["id"])
-    request_body_json = json.loads(request.body.decode("utf-8"))
-    expected_json = json.loads(b'{"foo": "bar", "baz": "qux"}'.decode("utf-8"))
+    request_body_json = json.loads(request.body)
+    expected_json = json.loads(b'{"foo": "bar", "baz": "qux"}')
     assert request_body_json == expected_json
 
 
@@ -297,6 +298,18 @@ def test_decode_response_deflate():
     assert decoded_response["headers"]["content-length"] == [str(len(body))]
 
 
+def test_decode_response_deflate_already_decompressed():
+    body = b"deflate message"
+    gzip_response = {
+        "body": {"string": body},
+        "headers": {
+            "content-encoding": ["deflate"],
+        },
+    }
+    decoded_response = decode_response(gzip_response)
+    assert decoded_response["body"]["string"] == body
+
+
 def test_decode_response_gzip():
     body = b"gzip message"
 
@@ -324,3 +337,15 @@ def test_decode_response_gzip():
     decoded_response = decode_response(gzip_response)
     assert decoded_response["body"]["string"] == body
     assert decoded_response["headers"]["content-length"] == [str(len(body))]
+
+
+def test_decode_response_gzip_already_decompressed():
+    body = b"gzip message"
+    gzip_response = {
+        "body": {"string": body},
+        "headers": {
+            "content-encoding": ["gzip"],
+        },
+    }
+    decoded_response = decode_response(gzip_response)
+    assert decoded_response["body"]["string"] == body

tests/unit/test_json_serializer.py

@@ -1,6 +1,7 @@
 import pytest
-from vcr.serializers.jsonserializer import serialize
+
 from vcr.request import Request
+from vcr.serializers.jsonserializer import serialize
 
 
 def test_serialize_binary():

tests/unit/test_matchers.py

@@ -3,8 +3,7 @@ from unittest import mock
 
 import pytest
 
-from vcr import matchers
-from vcr import request
+from vcr import matchers, request
 
 # the dict contains requests with corresponding to its key difference
 # with 'base' request.
@@ -64,6 +63,9 @@ boto3_bytes_headers = {
     "Expect": b"100-continue",
     "Content-Length": "21",
 }
+chunked_headers = {
+    "Transfer-Encoding": "chunked",
+}
 
 
 @pytest.mark.parametrize(
@@ -75,10 +77,16 @@ boto3_bytes_headers = {
         ),
         (
             request.Request(
-                "POST", "http://host.com/", "a=1&b=2", {"Content-Type": "application/x-www-form-urlencoded"}
+                "POST",
+                "http://host.com/",
+                "a=1&b=2",
+                {"Content-Type": "application/x-www-form-urlencoded"},
             ),
             request.Request(
-                "POST", "http://host.com/", "b=2&a=1", {"Content-Type": "application/x-www-form-urlencoded"}
+                "POST",
+                "http://host.com/",
+                "b=2&a=1",
+                {"Content-Type": "application/x-www-form-urlencoded"},
             ),
         ),
         (
@@ -87,23 +95,38 @@ boto3_bytes_headers = {
         ),
         (
             request.Request(
-                "POST", "http://host.com/", "a=1&b=2", {"Content-Type": "application/x-www-form-urlencoded"}
+                "POST",
+                "http://host.com/",
+                "a=1&b=2",
+                {"Content-Type": "application/x-www-form-urlencoded"},
             ),
             request.Request(
-                "POST", "http://host.com/", "b=2&a=1", {"Content-Type": "application/x-www-form-urlencoded"}
+                "POST",
+                "http://host.com/",
+                "b=2&a=1",
+                {"Content-Type": "application/x-www-form-urlencoded"},
             ),
         ),
         (
             request.Request(
-                "POST", "http://host.com/", '{"a": 1, "b": 2}', {"Content-Type": "application/json"}
+                "POST",
+                "http://host.com/",
+                '{"a": 1, "b": 2}',
+                {"Content-Type": "application/json"},
             ),
             request.Request(
-                "POST", "http://host.com/", '{"b": 2, "a": 1}', {"content-type": "application/json"}
+                "POST",
+                "http://host.com/",
+                '{"b": 2, "a": 1}',
+                {"content-type": "application/json"},
             ),
         ),
         (
             request.Request(
-                "POST", "http://host.com/", req1_body, {"User-Agent": "xmlrpclib", "Content-Type": "text/xml"}
+                "POST",
+                "http://host.com/",
+                req1_body,
+                {"User-Agent": "xmlrpclib", "Content-Type": "text/xml"},
             ),
             request.Request(
                 "POST",
@@ -114,10 +137,16 @@ boto3_bytes_headers = {
         ),
         (
             request.Request(
-                "POST", "http://host.com/", '{"a": 1, "b": 2}', {"Content-Type": "application/json"}
+                "POST",
+                "http://host.com/",
+                '{"a": 1, "b": 2}',
+                {"Content-Type": "application/json"},
             ),
             request.Request(
-                "POST", "http://host.com/", '{"b": 2, "a": 1}', {"content-type": "application/json"}
+                "POST",
+                "http://host.com/",
+                '{"b": 2, "a": 1}',
+                {"content-type": "application/json"},
             ),
         ),
         (
@@ -125,6 +154,36 @@ boto3_bytes_headers = {
             request.Request("POST", "http://aws.custom.com/", b"123", boto3_bytes_headers),
             request.Request("POST", "http://aws.custom.com/", b"123", boto3_bytes_headers),
         ),
+        (
+            # chunked transfer encoding: decoded bytes versus encoded bytes
+            request.Request("POST", "scheme1://host1.test/", b"123456789_123456", chunked_headers),
+            request.Request(
+                "GET",
+                "scheme2://host2.test/",
+                b"10\r\n123456789_123456\r\n0\r\n\r\n",
+                chunked_headers,
+            ),
+        ),
+        (
+            # chunked transfer encoding: bytes iterator versus string iterator
+            request.Request(
+                "POST",
+                "scheme1://host1.test/",
+                iter([b"123456789_", b"123456"]),
+                chunked_headers,
+            ),
+            request.Request("GET", "scheme2://host2.test/", iter(["123456789_", "123456"]), chunked_headers),
+        ),
+        (
+            # chunked transfer encoding: bytes iterator versus single byte iterator
+            request.Request(
+                "POST",
+                "scheme1://host1.test/",
+                iter([b"123456789_", b"123456"]),
+                chunked_headers,
+            ),
+            request.Request("GET", "scheme2://host2.test/", iter(b"123456789_123456"), chunked_headers),
+        ),
     ],
 )
 def test_body_matcher_does_match(r1, r2):
@@ -140,10 +199,16 @@ def test_body_matcher_does_match(r1, r2):
         ),
         (
             request.Request(
-                "POST", "http://host.com/", '{"a": 1, "b": 3}', {"Content-Type": "application/json"}
+                "POST",
+                "http://host.com/",
+                '{"a": 1, "b": 3}',
+                {"Content-Type": "application/json"},
             ),
             request.Request(
-                "POST", "http://host.com/", '{"b": 2, "a": 1}', {"content-type": "application/json"}
+                "POST",
+                "http://host.com/",
+                '{"b": 2, "a": 1}',
+                {"content-type": "application/json"},
             ),
         ),
         (

tests/unit/test_migration.py

@@ -1,6 +1,7 @@
 import filecmp
 import json
 import shutil
+
 import yaml
 
 import vcr.migration
@@ -16,9 +17,9 @@ def test_try_migrate_with_json(tmpdir):
     cassette = tmpdir.join("cassette.json").strpath
     shutil.copy("tests/fixtures/migration/old_cassette.json", cassette)
     assert vcr.migration.try_migrate(cassette)
-    with open("tests/fixtures/migration/new_cassette.json", "r") as f:
+    with open("tests/fixtures/migration/new_cassette.json") as f:
         expected_json = json.load(f)
-    with open(cassette, "r") as f:
+    with open(cassette) as f:
         actual_json = json.load(f)
     assert actual_json == expected_json
 
@@ -27,9 +28,9 @@ def test_try_migrate_with_yaml(tmpdir):
     cassette = tmpdir.join("cassette.yaml").strpath
     shutil.copy("tests/fixtures/migration/old_cassette.yaml", cassette)
     assert vcr.migration.try_migrate(cassette)
-    with open("tests/fixtures/migration/new_cassette.yaml", "r") as f:
+    with open("tests/fixtures/migration/new_cassette.yaml") as f:
         expected_yaml = yaml.load(f, Loader=Loader)
-    with open(cassette, "r") as f:
+    with open(cassette) as f:
         actual_yaml = yaml.load(f, Loader=Loader)
     assert actual_yaml == expected_yaml
 

tests/unit/test_request.py

@@ -1,6 +1,6 @@
 import pytest
 
-from vcr.request import Request, HeadersDict
+from vcr.request import HeadersDict, Request
 
 
 @pytest.mark.parametrize(
@@ -60,7 +60,6 @@ def test_uri(method, uri):
 
 
 def test_HeadersDict():
-
     # Simple test of CaseInsensitiveDict
     h = HeadersDict()
     assert h == {}

tests/unit/test_response.py

@@ -1,4 +1,3 @@
-# coding: UTF-8
 import io
 
 from vcr.stubs import VCRHTTPResponse
@@ -89,11 +88,11 @@ def test_response_parses_correctly_and_fp_attribute_error_is_not_thrown():
             b"different types of cancer cells. Recently, the first HDACi was\n      "
             b"approved for the "
             b"treatment of cutaneous T cell lymphomas. Most HDACi currently in\n      "
-            b"clinical "
+            b"clinical ",
         },
     }
     vcr_response = VCRHTTPResponse(recorded_response)
-    handle = io.TextIOWrapper(io.BufferedReader(vcr_response), encoding="utf-8")
+    handle = io.TextIOWrapper(vcr_response, encoding="utf-8")
     handle = iter(handle)
-    articles = [line for line in handle]
+    articles = list(handle)
     assert len(articles) > 1

tests/unit/test_serialize.py

@@ -1,32 +1,29 @@
-# -*- encoding: utf-8 -*-
 from unittest import mock
 
 import pytest
 
 from vcr.request import Request
 from vcr.serialize import deserialize, serialize
-from vcr.serializers import yamlserializer, jsonserializer, compat
+from vcr.serializers import compat, jsonserializer, yamlserializer
 
 
 def test_deserialize_old_yaml_cassette():
-    with open("tests/fixtures/migration/old_cassette.yaml", "r") as f:
-        with pytest.raises(ValueError):
+    with open("tests/fixtures/migration/old_cassette.yaml") as f, pytest.raises(ValueError):
         deserialize(f.read(), yamlserializer)
 
 
 def test_deserialize_old_json_cassette():
-    with open("tests/fixtures/migration/old_cassette.json", "r") as f:
-        with pytest.raises(ValueError):
+    with open("tests/fixtures/migration/old_cassette.json") as f, pytest.raises(ValueError):
         deserialize(f.read(), jsonserializer)
 
 
 def test_deserialize_new_yaml_cassette():
-    with open("tests/fixtures/migration/new_cassette.yaml", "r") as f:
+    with open("tests/fixtures/migration/new_cassette.yaml") as f:
         deserialize(f.read(), yamlserializer)
 
 
 def test_deserialize_new_json_cassette():
-    with open("tests/fixtures/migration/new_cassette.json", "r") as f:
+    with open("tests/fixtures/migration/new_cassette.json") as f:
         deserialize(f.read(), jsonserializer)
 
 
@@ -77,7 +74,7 @@ def test_deserialize_py2py3_yaml_cassette(tmpdir, req_body, expect):
     cfile = tmpdir.join("test_cassette.yaml")
     cfile.write(REQBODY_TEMPLATE.format(req_body=req_body))
     with open(str(cfile)) as f:
-        (requests, responses) = deserialize(f.read(), yamlserializer)
+        (requests, _) = deserialize(f.read(), yamlserializer)
     assert requests[0].body == expect
 
 

tests/unit/test_stubs.py

@@ -1,8 +1,14 @@
+import contextlib
+import http.client as httplib
+from io import BytesIO
+from tempfile import NamedTemporaryFile
 from unittest import mock
 
-from vcr import mode
-from vcr.stubs import VCRHTTPSConnection
+from pytest import mark
+
+from vcr import mode, use_cassette
 from vcr.cassette import Cassette
+from vcr.stubs import VCRHTTPSConnection
 
 
 class TestVCRConnection:
@@ -11,9 +17,59 @@ class TestVCRConnection:
         vcr_connection.ssl_version = "example_ssl_version"
         assert vcr_connection.real_connection.ssl_version == "example_ssl_version"
 
+    @mark.online
     @mock.patch("vcr.cassette.Cassette.can_play_response_for", return_value=False)
     def testing_connect(*args):
-        vcr_connection = VCRHTTPSConnection("www.google.com")
+        with contextlib.closing(VCRHTTPSConnection("www.google.com")) as vcr_connection:
             vcr_connection.cassette = Cassette("test", record_mode=mode.ALL)
             vcr_connection.real_connection.connect()
             assert vcr_connection.real_connection.sock is not None
+
+    def test_body_consumed_once_stream(self, tmpdir, httpbin):
+        self._test_body_consumed_once(
+            tmpdir,
+            httpbin,
+            BytesIO(b"1234567890"),
+            BytesIO(b"9876543210"),
+            BytesIO(b"9876543210"),
+        )
+
+    def test_body_consumed_once_iterator(self, tmpdir, httpbin):
+        self._test_body_consumed_once(
+            tmpdir,
+            httpbin,
+            iter([b"1234567890"]),
+            iter([b"9876543210"]),
+            iter([b"9876543210"]),
+        )
+
+    # data2 and data3 should serve the same data, potentially as iterators
+    def _test_body_consumed_once(
+        self,
+        tmpdir,
+        httpbin,
+        data1,
+        data2,
+        data3,
+    ):
+        with NamedTemporaryFile(dir=tmpdir, suffix=".yml") as f:
+            testpath = f.name
+            # NOTE: ``use_cassette`` is not okay with the file existing
+            #       already.  So we using ``.close()`` to not only
+            #       close but also delete the empty file, before we start.
+            f.close()
+            host, port = httpbin.host, httpbin.port
+            match_on = ["method", "uri", "body"]
+            with use_cassette(testpath, match_on=match_on):
+                conn1 = httplib.HTTPConnection(host, port)
+                conn1.request("POST", "/anything", body=data1)
+                conn1.getresponse()
+                conn2 = httplib.HTTPConnection(host, port)
+                conn2.request("POST", "/anything", body=data2)
+                conn2.getresponse()
+            with use_cassette(testpath, match_on=match_on) as cass:
+                conn3 = httplib.HTTPConnection(host, port)
+                conn3.request("POST", "/anything", body=data3)
+                conn3.getresponse()
+            assert cass.play_counts[0] == 0
+            assert cass.play_counts[1] == 1

tests/unit/test_unittest.py

@@ -0,0 +1,199 @@
+import os
+from unittest import TextTestRunner, defaultTestLoader
+from unittest.mock import MagicMock
+from urllib.request import urlopen
+
+import pytest
+
+from vcr.unittest import VCRTestCase
+
+
+def test_defaults():
+    class MyTest(VCRTestCase):
+        def test_foo(self):
+            pass
+
+    test = run_testcase(MyTest)[0][0]
+    expected_path = os.path.join(os.path.dirname(__file__), "cassettes")
+    expected_name = "MyTest.test_foo.yaml"
+    assert os.path.dirname(test.cassette._path) == expected_path
+    assert os.path.basename(test.cassette._path) == expected_name
+
+
+def test_disabled():
+    # Baseline vcr_enabled = True
+    class MyTest(VCRTestCase):
+        def test_foo(self):
+            pass
+
+    test = run_testcase(MyTest)[0][0]
+    assert hasattr(test, "cassette")
+
+    # Test vcr_enabled = False
+    class MyTest(VCRTestCase):
+        vcr_enabled = False
+
+        def test_foo(self):
+            pass
+
+    test = run_testcase(MyTest)[0][0]
+    assert not hasattr(test, "cassette")
+
+
+def test_cassette_library_dir():
+    class MyTest(VCRTestCase):
+        def test_foo(self):
+            pass
+
+        def _get_cassette_library_dir(self):
+            return "/testing"
+
+    test = run_testcase(MyTest)[0][0]
+    assert test.cassette._path.startswith("/testing/")
+
+
+def test_cassette_name():
+    class MyTest(VCRTestCase):
+        def test_foo(self):
+            pass
+
+        def _get_cassette_name(self):
+            return "my-custom-name"
+
+    test = run_testcase(MyTest)[0][0]
+    assert os.path.basename(test.cassette._path) == "my-custom-name"
+
+
+def test_vcr_kwargs_overridden():
+    class MyTest(VCRTestCase):
+        def test_foo(self):
+            pass
+
+        def _get_vcr_kwargs(self):
+            kwargs = super()._get_vcr_kwargs()
+            kwargs["record_mode"] = "new_episodes"
+            return kwargs
+
+    test = run_testcase(MyTest)[0][0]
+    assert test.cassette.record_mode == "new_episodes"
+
+
+def test_vcr_kwargs_passed():
+    class MyTest(VCRTestCase):
+        def test_foo(self):
+            pass
+
+        def _get_vcr_kwargs(self):
+            return super()._get_vcr_kwargs(
+                record_mode="new_episodes",
+            )
+
+    test = run_testcase(MyTest)[0][0]
+    assert test.cassette.record_mode == "new_episodes"
+
+
+def test_vcr_kwargs_cassette_dir():
+    # Test that _get_cassette_library_dir applies if cassette_library_dir
+    # is absent from vcr kwargs.
+    class MyTest(VCRTestCase):
+        def test_foo(self):
+            pass
+
+        def _get_vcr_kwargs(self):
+            return {
+                "record_mode": "new_episodes",
+            }
+
+        _get_cassette_library_dir = MagicMock(return_value="/testing")
+
+    test = run_testcase(MyTest)[0][0]
+    assert test.cassette._path.startswith("/testing/")
+    assert test._get_cassette_library_dir.call_count == 1
+
+    # Test that _get_cassette_library_dir is ignored if cassette_library_dir
+    # is present in vcr kwargs.
+    class MyTest(VCRTestCase):
+        def test_foo(self):
+            pass
+
+        def _get_vcr_kwargs(self):
+            return {
+                "cassette_library_dir": "/testing",
+            }
+
+        _get_cassette_library_dir = MagicMock(return_value="/ignored")
+
+    test = run_testcase(MyTest)[0][0]
+    assert test.cassette._path.startswith("/testing/")
+    assert test._get_cassette_library_dir.call_count == 0
+
+
+@pytest.mark.online
+def test_get_vcr_with_matcher(tmpdir):
+    cassette_dir = tmpdir.mkdir("cassettes")
+    assert len(cassette_dir.listdir()) == 0
+
+    mock_matcher = MagicMock(return_value=True, __name__="MockMatcher")
+
+    class MyTest(VCRTestCase):
+        def test_foo(self):
+            self.response = urlopen("http://example.com").read()
+
+        def _get_vcr(self):
+            myvcr = super()._get_vcr()
+            myvcr.register_matcher("mymatcher", mock_matcher)
+            myvcr.match_on = ["mymatcher"]
+            return myvcr
+
+        def _get_cassette_library_dir(self):
+            return str(cassette_dir)
+
+    # First run to fill cassette.
+    test = run_testcase(MyTest)[0][0]
+    assert len(test.cassette.requests) == 1
+    assert not mock_matcher.called  # nothing in cassette
+
+    # Second run to call matcher.
+    test = run_testcase(MyTest)[0][0]
+    assert len(test.cassette.requests) == 1
+    assert mock_matcher.called
+    assert (
+        repr(mock_matcher.mock_calls[0])
+        == "call(<Request (GET) http://example.com>, <Request (GET) http://example.com>)"
+    )
+
+
+@pytest.mark.online
+def test_testcase_playback(tmpdir):
+    cassette_dir = tmpdir.mkdir("cassettes")
+    assert len(cassette_dir.listdir()) == 0
+
+    # First test actually reads from the web.
+
+    class MyTest(VCRTestCase):
+        def test_foo(self):
+            self.response = urlopen("http://example.com").read()
+
+        def _get_cassette_library_dir(self):
+            return str(cassette_dir)
+
+    test = run_testcase(MyTest)[0][0]
+    assert b"Example Domain" in test.response
+    assert len(test.cassette.requests) == 1
+    assert test.cassette.play_count == 0
+
+    # Second test reads from cassette.
+
+    test2 = run_testcase(MyTest)[0][0]
+    assert test.cassette is not test2.cassette
+    assert b"Example Domain" in test.response
+    assert len(test2.cassette.requests) == 1
+    assert test2.cassette.play_count == 1
+
+
+def run_testcase(testcase_class):
+    """Run all the tests in a TestCase and return them."""
+    suite = defaultTestLoader.loadTestsFromTestCase(testcase_class)
+    tests = list(suite._tests)
+    result = TextTestRunner().run(suite)
+    return tests, result

tests/unit/test_util.py

@@ -0,0 +1,33 @@
+from io import BytesIO, StringIO
+
+import pytest
+
+from vcr import request
+from vcr.util import read_body
+
+
+@pytest.mark.parametrize(
+    "input_, expected_output",
+    [
+        (BytesIO(b"Stream"), b"Stream"),
+        (StringIO("Stream"), b"Stream"),
+        (iter(["StringIter"]), b"StringIter"),
+        (iter(["String", "Iter"]), b"StringIter"),
+        (iter([b"BytesIter"]), b"BytesIter"),
+        (iter([b"Bytes", b"Iter"]), b"BytesIter"),
+        (iter([70, 111, 111]), b"Foo"),
+        (iter([]), b""),
+        ("String", b"String"),
+        (b"Bytes", b"Bytes"),
+    ],
+)
+def test_read_body(input_, expected_output):
+    r = request.Request("POST", "http://host.com/", input_, {})
+    assert read_body(r) == expected_output
+
+
+def test_unsupported_read_body():
+    r = request.Request("POST", "http://host.com/", iter([[]]), {})
+    with pytest.raises(ValueError) as excinfo:
+        assert read_body(r)
+    assert excinfo.value.args == ("Body type <class 'list'> not supported",)

tests/unit/test_vcr.py

@@ -1,20 +1,22 @@
-from unittest import mock
+import http.client as httplib
 import os
+from pathlib import Path
+from unittest import mock
 
 import pytest
-import http.client as httplib
 
 from vcr import VCR, mode, use_cassette
+from vcr.patch import _HTTPConnection, force_reset
 from vcr.request import Request
 from vcr.stubs import VCRHTTPSConnection
-from vcr.patch import _HTTPConnection, force_reset
 
 
 def test_vcr_use_cassette():
     record_mode = mock.Mock()
     test_vcr = VCR(record_mode=record_mode)
     with mock.patch(
-        "vcr.cassette.Cassette.load", return_value=mock.MagicMock(inject=False)
+        "vcr.cassette.Cassette.load",
+        return_value=mock.MagicMock(inject=False),
     ) as mock_cassette_load:
 
         @test_vcr.use_cassette("test")
@@ -40,7 +42,7 @@ def test_vcr_use_cassette():
 
 
 def test_vcr_before_record_request_params():
-    base_path = "http://httpbin.org/"
+    base_path = "http://whatever.test/"
 
     def before_record_cb(request):
         if request.path != "/get":
@@ -70,16 +72,19 @@ def test_vcr_before_record_request_params():
 
         # Test filter_headers
         request = Request(
-            "GET", base_path + "?foo=bar", "", {"cookie": "test", "other": "fun", "bert": "nobody"}
+            "GET",
+            base_path + "?foo=bar",
+            "",
+            {"cookie": "test", "other": "fun", "bert": "nobody"},
         )
         assert cassette.filter_request(request).headers == {"other": "fun", "bert": "ernie"}
 
         # Test ignore_hosts
-        request = Request("GET", "http://www.test.com" + "?foo=bar", "", {"cookie": "test", "other": "fun"})
+        request = Request("GET", "http://www.test.com?foo=bar", "", {"cookie": "test", "other": "fun"})
         assert cassette.filter_request(request) is None
 
         # Test ignore_localhost
-        request = Request("GET", "http://localhost:8000" + "?foo=bar", "", {"cookie": "test", "other": "fun"})
+        request = Request("GET", "http://localhost:8000?foo=bar", "", {"cookie": "test", "other": "fun"})
         assert cassette.filter_request(request) is None
 
     with test_vcr.use_cassette("test", before_record_request=None) as cassette:
@@ -95,7 +100,6 @@ def test_vcr_before_record_response_iterable():
 
     # Prevent actually saving the cassette
     with mock.patch("vcr.cassette.FilesystemPersister.save_cassette"):
-
         # Baseline: non-iterable before_record_response should work
         mock_filter = mock.Mock()
         vcr = VCR(before_record_response=mock_filter)
@@ -119,7 +123,6 @@ def test_before_record_response_as_filter():
 
     # Prevent actually saving the cassette
     with mock.patch("vcr.cassette.FilesystemPersister.save_cassette"):
-
         filter_all = mock.Mock(return_value=None)
         vcr = VCR(before_record_response=filter_all)
         with vcr.use_cassette("test") as cassette:
@@ -133,7 +136,6 @@ def test_vcr_path_transformer():
 
     # Prevent actually saving the cassette
     with mock.patch("vcr.cassette.FilesystemPersister.save_cassette"):
-
         # Baseline: path should be unchanged
         vcr = VCR()
         with vcr.use_cassette("test") as cassette:
@@ -261,7 +263,9 @@ def test_cassette_library_dir_with_decoration_and_super_explicit_path():
 def test_cassette_library_dir_with_path_transformer():
     library_dir = "/library_dir"
     vcr = VCR(
-        inject_cassette=True, cassette_library_dir=library_dir, path_transformer=lambda path: path + ".json"
+        inject_cassette=True,
+        cassette_library_dir=library_dir,
+        path_transformer=lambda path: path + ".json",
     )
 
     @vcr.use_cassette()
@@ -360,3 +364,27 @@ def test_dynamically_added(self):
 
 TestVCRClass.test_dynamically_added = test_dynamically_added
 del test_dynamically_added
+
+
+def test_path_class_as_cassette():
+    path = Path(__file__).parent.parent.joinpath(
+        "integration/cassettes/test_httpx_test_test_behind_proxy.yml",
+    )
+    with use_cassette(path):
+        pass
+
+
+def test_use_cassette_generator_return():
+    ret_val = object()
+
+    vcr = VCR()
+
+    @vcr.use_cassette("test")
+    def gen():
+        return ret_val
+        yield
+
+    with pytest.raises(StopIteration) as exc_info:
+        next(gen())
+
+    assert exc_info.value.value is ret_val

tests/unit/test_vcr_import.py

@@ -2,15 +2,10 @@ import sys
 
 
 def test_vcr_import_deprecation(recwarn):
-
     if "vcr" in sys.modules:
         # Remove imported module entry if already loaded in another test
         del sys.modules["vcr"]
 
     import vcr  # noqa: F401
 
-    if sys.version_info[0] == 2:
-        assert len(recwarn) == 1
-        assert issubclass(recwarn[0].category, DeprecationWarning)
-    else:
     assert len(recwarn) == 0

tox.ini

@@ -1,105 +0,0 @@
-[tox]
-skip_missing_interpreters=true
-envlist =
-  cov-clean,
-  lint,
-  {py37,py38,py39,py310}-{requests,httplib2,urllib3,tornado4,boto3,aiohttp,httpx},
-  {pypy3}-{requests,httplib2,urllib3,tornado4,boto3},
-  {py310}-httpx019,
-  cov-report
-
-
-[gh-actions]
-python =
-    3.7: py37, lint
-    3.8: py38
-    3.9: py39
-    3.10: py310
-    pypy-3: pypy3
-
-# Coverage environment tasks: cov-clean and cov-report
-# https://pytest-cov.readthedocs.io/en/latest/tox.html
-[testenv:cov-clean]
-deps = coverage
-skip_install=true
-commands = coverage erase
-
-[testenv:cov-report]
-deps = coverage
-skip_install=true
-commands =
-  coverage html
-  coverage report --fail-under=90
-
-[testenv:lint]
-skipsdist = True
-commands =
-    black --version
-    black --check --diff .
-    flake8 --version
-    flake8 --exclude=./docs/conf.py,./.tox/
-    pyflakes ./docs/conf.py
-deps =
-  flake8
-  black
-basepython = python3.7
-
-[testenv:docs]
-# Running sphinx from inside the "docs" directory
-# ensures it will not pick up any stray files that might
-# get into a virtual environment under the top-level directory
-# or other artifacts under build/
-changedir = docs
-# The only dependency is sphinx
-# If we were using extensions packaged separately,
-# we would specify them here.
-# A better practice is to specify a specific version of sphinx.
-deps =
-    sphinx
-    sphinx_rtd_theme
-# This is the sphinx command to generate HTML.
-# In other circumstances, we might want to generate a PDF or an ebook
-commands =
-    sphinx-build -W -b html -d {envtmpdir}/doctrees . {envtmpdir}/html
-# We use Python 3.7. Tox sometimes tries to autodetect it based on the name of
-# the testenv, but "docs" does not give useful clues so we have to be explicit.
-basepython = python3.7
-
-[testenv]
-# Need to use develop install so that paths
-# for aggregate code coverage combine
-usedevelop=true
-commands =
-    ./runtests.sh --cov=./vcr --cov-branch --cov-report=xml --cov-append {posargs}
-deps =
-    Werkzeug==2.0.3
-    pytest
-    git+https://github.com/immerrr/pytest-httpbin@fix-redirect-location-scheme-for-secure-server
-    pytest-cov
-    PyYAML
-    ipaddress
-    requests: requests>=2.22.0
-    httplib2: httplib2
-    urllib3: urllib3
-    boto3: boto3
-    boto3: urllib3
-    aiohttp: aiohttp
-    aiohttp: pytest-asyncio
-    aiohttp: pytest-aiohttp
-    httpx: httpx
-    {py37,py38,py39,py310}-{httpx}: httpx
-    {py37,py38,py39,py310}-{httpx}: pytest-asyncio
-    httpx: httpx>0.19
-    # httpx==0.19 is the latest version that supports allow_redirects, newer versions use follow_redirects
-    httpx019: httpx==0.19
-    {py37,py38,py39,py310}-{httpx}: pytest-asyncio
-depends =
-  lint,{py37,py38,py39,py310,pypy3}-{requests,httplib2,urllib3,tornado4,boto3},{py37,py38,py39,py310}-{aiohttp},{py37,py38,py39,py310}-{httpx}: cov-clean
-  cov-report: lint,{py37,py38,py39,py310,pypy3}-{requests,httplib2,urllib3,tornado4,boto3},{py37,py38,py39,py310}-{aiohttp}
-passenv =
-    AWS_ACCESS_KEY_ID
-    AWS_DEFAULT_REGION
-    AWS_SECRET_ACCESS_KEY
-
-[flake8]
-max_line_length = 110

vcr/__init__.py

@@ -1,9 +1,10 @@
 import logging
-from .config import VCR
 from logging import NullHandler
-from .record_mode import RecordMode as mode  # noqa import is not used in this file
 
-__version__ = "4.2.0"
+from .config import VCR
+from .record_mode import RecordMode as mode  # noqa: F401
+
+__version__ = "7.0.0"
 
 logging.getLogger(__name__).addHandler(NullHandler())
 

vcr/_handle_coroutine.py

@@ -1,3 +1,3 @@
-async def handle_coroutine(vcr, fn):  # noqa: E999
+async def handle_coroutine(vcr, fn):
     with vcr as cassette:
-        return await fn(cassette)  # noqa: E999
+        return await fn(cassette)

vcr/cassette.py

@@ -1,28 +1,20 @@
 import collections
 import contextlib
 import copy
-import sys
 import inspect
 import logging
+from inspect import iscoroutinefunction
 
 import wrapt
 
-from .errors import UnhandledHTTPRequestError
-from .matchers import requests_match, uri, method, get_matchers_results
-from .patch import CassettePatcherBuilder
-from .serializers import yamlserializer
-from .persisters.filesystem import FilesystemPersister
-from .util import partition_dict
 from ._handle_coroutine import handle_coroutine
+from .errors import UnhandledHTTPRequestError
+from .matchers import get_matchers_results, method, requests_match, uri
+from .patch import CassettePatcherBuilder
+from .persisters.filesystem import CassetteDecodeError, CassetteNotFoundError, FilesystemPersister
 from .record_mode import RecordMode
-
-try:
-    from asyncio import iscoroutinefunction
-except ImportError:
-
-    def iscoroutinefunction(*args, **kwargs):
-        return False
-
+from .serializers import yamlserializer
+from .util import partition_dict
 
 log = logging.getLogger(__name__)
 
@@ -45,7 +37,11 @@ class CassetteContextDecorator:
     this class as a context manager in ``__exit__``.
     """
 
-    _non_cassette_arguments = ("path_transformer", "func_path_generator")
+    _non_cassette_arguments = (
+        "path_transformer",
+        "func_path_generator",
+        "record_on_exception",
+    )
 
     @classmethod
     def from_args(cls, cassette_class, **kwargs):
@@ -55,6 +51,7 @@ class CassetteContextDecorator:
         self.cls = cls
         self._args_getter = args_getter
         self.__finish = None
+        self.__cassette = None
 
     def _patch_generator(self, cassette):
         with contextlib.ExitStack() as exit_stack:
@@ -64,9 +61,6 @@ class CassetteContextDecorator:
             log.debug(log_format.format(action="Entering", path=cassette._path))
             yield cassette
             log.debug(log_format.format(action="Exiting", path=cassette._path))
-            # TODO(@IvanMalison): Hmmm. it kind of feels like this should be
-            # somewhere else.
-            cassette._save()
 
     def __enter__(self):
         # This assertion is here to prevent the dangerous behavior
@@ -79,15 +73,28 @@ class CassetteContextDecorator:
         #         pass
         assert self.__finish is None, "Cassette already open."
         other_kwargs, cassette_kwargs = partition_dict(
-            lambda key, _: key in self._non_cassette_arguments, self._args_getter()
+            lambda key, _: key in self._non_cassette_arguments,
+            self._args_getter(),
         )
         if other_kwargs.get("path_transformer"):
             transformer = other_kwargs["path_transformer"]
             cassette_kwargs["path"] = transformer(cassette_kwargs["path"])
-        self.__finish = self._patch_generator(self.cls.load(**cassette_kwargs))
+        self.__cassette = self.cls.load(**cassette_kwargs)
+        self.__finish = self._patch_generator(self.__cassette)
         return next(self.__finish)
 
-    def __exit__(self, *args):
+    def __exit__(self, *exc_info):
+        exception_was_raised = any(exc_info)
+        record_on_exception = self._args_getter().get("record_on_exception", True)
+        if record_on_exception or not exception_was_raised:
+            self.__cassette._save()
+            self.__cassette = None
+        # Fellow programmer, don't remove this `next`, if `self.__finish` is
+        # not consumed the unpatcher functions accumulated in the `exit_stack`
+        # object created in `_patch_generator` will not be called until
+        # `exit_stack` is not garbage collected.
+        # This works in CPython but not in Pypy, where the unpatchers will not
+        # be called until much later.
         next(self.__finish, None)
         self.__finish = None
 
@@ -118,20 +125,7 @@ class CassetteContextDecorator:
         duration of the generator.
         """
         with self as cassette:
-            coroutine = fn(cassette)
-            # We don't need to catch StopIteration. The caller (Tornado's
-            # gen.coroutine, for example) will handle that.
-            to_yield = next(coroutine)
-            while True:
-                try:
-                    to_send = yield to_yield
-                except Exception:
-                    to_yield = coroutine.throw(*sys.exc_info())
-                else:
-                    try:
-                        to_yield = coroutine.send(to_send)
-                    except StopIteration:
-                        break
+            return (yield from fn(cassette))
 
     def _handle_function(self, fn):
         with self as cassette:
@@ -183,6 +177,7 @@ class Cassette:
         custom_patches=(),
         inject=False,
         allow_playback_repeats=False,
+        drop_unused_requests=False,
     ):
         self._persister = persister or FilesystemPersister
         self._path = path
@@ -195,6 +190,7 @@ class Cassette:
         self.record_mode = record_mode
         self.custom_patches = custom_patches
         self.allow_playback_repeats = allow_playback_repeats
+        self.drop_unused_requests = drop_unused_requests
 
         # self.data is the list of (req, resp) tuples
         self.data = []
@@ -202,6 +198,10 @@ class Cassette:
         self.dirty = False
         self.rewound = False
 
+        # Subsets of self.data to store old and played interactions
+        self._old_interactions = []
+        self._played_interactions = []
+
     @property
     def play_count(self):
         return sum(self.play_counts.values())
@@ -221,14 +221,14 @@ class Cassette:
 
     @property
     def write_protected(self):
-        return self.rewound and self.record_mode == RecordMode.ONCE or self.record_mode == RecordMode.NONE
+        return (self.rewound and self.record_mode == RecordMode.ONCE) or self.record_mode == RecordMode.NONE
 
     def append(self, request, response):
         """Add a request, response pair to this cassette"""
-        log.info("Appending request %s and response %s", request, response)
         request = self._before_record_request(request)
         if not request:
             return
+        log.info("Appending request %s and response %s", request, response)
         # Deepcopy is here because mutation of `response` will corrupt the
         # real response.
         response = copy.deepcopy(response)
@@ -263,10 +263,11 @@ class Cassette:
         for index, response in self._responses(request):
             if self.play_counts[index] == 0 or self.allow_playback_repeats:
                 self.play_counts[index] += 1
+                self._played_interactions.append((request, response))
                 return response
         # The cassette doesn't contain the request asked for.
         raise UnhandledHTTPRequestError(
-            "The cassette (%r) doesn't contain the request (%r) asked for" % (self._path, request)
+            f"The cassette ({self._path!r}) doesn't contain the request ({request!r}) asked for",
         )
 
     def responses_of(self, request):
@@ -281,7 +282,7 @@ class Cassette:
             return responses
         # The cassette doesn't contain the request asked for.
         raise UnhandledHTTPRequestError(
-            "The cassette (%r) doesn't contain the request (%r) asked for" % (self._path, request)
+            f"The cassette ({self._path!r}) doesn't contain the request ({request!r}) asked for",
         )
 
     def rewind(self):
@@ -300,7 +301,7 @@ class Cassette:
         """
         best_matches = []
         request = self._before_record_request(request)
-        for index, (stored_request, response) in enumerate(self.data):
+        for _, (stored_request, _) in enumerate(self.data):
             successes, fails = get_matchers_results(request, stored_request, self._match_on)
             best_matches.append((len(successes), stored_request, successes, fails))
         best_matches.sort(key=lambda t: t[0], reverse=True)
@@ -323,26 +324,51 @@ class Cassette:
 
         return final_best_matches
 
+    def _new_interactions(self):
+        """List of new HTTP interactions (request/response tuples)"""
+        new_interactions = []
+        for request, response in self.data:
+            if all(
+                not requests_match(request, old_request, self._match_on)
+                for old_request, _ in self._old_interactions
+            ):
+                new_interactions.append((request, response))
+        return new_interactions
+
     def _as_dict(self):
         return {"requests": self.requests, "responses": self.responses}
 
+    def _build_used_interactions_dict(self):
+        interactions = self._played_interactions + self._new_interactions()
+        cassete_dict = {
+            "requests": [request for request, _ in interactions],
+            "responses": [response for _, response in interactions],
+        }
+        return cassete_dict
+
     def _save(self, force=False):
+        if self.drop_unused_requests and len(self._played_interactions) < len(self._old_interactions):
+            cassete_dict = self._build_used_interactions_dict()
+            force = True
+        else:
+            cassete_dict = self._as_dict()
         if force or self.dirty:
-            self._persister.save_cassette(self._path, self._as_dict(), serializer=self._serializer)
+            self._persister.save_cassette(self._path, cassete_dict, serializer=self._serializer)
             self.dirty = False
 
     def _load(self):
         try:
             requests, responses = self._persister.load_cassette(self._path, serializer=self._serializer)
-            for request, response in zip(requests, responses):
+            for request, response in zip(requests, responses, strict=False):
                 self.append(request, response)
+                self._old_interactions.append((request, response))
             self.dirty = False
             self.rewound = True
-        except ValueError:
+        except (CassetteDecodeError, CassetteNotFoundError):
             pass
 
     def __str__(self):
-        return "<Cassette containing {} recorded response(s)>".format(len(self))
+        return f"<Cassette containing {len(self)} recorded response(s)>"
 
     def __len__(self):
         """Return the number of request,response pairs stored in here"""
@@ -350,7 +376,7 @@ class Cassette:
 
     def __contains__(self, request):
         """Return whether or not a request has been stored"""
-        for index, response in self._responses(request):
+        for index, _ in self._responses(request):
             if self.play_counts[index] == 0 or self.allow_playback_repeats:
                 return True
         return False

vcr/config.py

@@ -1,20 +1,17 @@
 import copy
-
-from collections import abc as collections_abc
 import functools
 import inspect
 import os
 import types
+from collections import abc as collections_abc
+from pathlib import Path
 
-import six
-
+from . import filters, matchers
 from .cassette import Cassette
-from .serializers import yamlserializer, jsonserializer
 from .persisters.filesystem import FilesystemPersister
-from .util import compose, auto_decorate
 from .record_mode import RecordMode
-from . import matchers
-from . import filters
+from .serializers import jsonserializer, yamlserializer
+from .util import auto_decorate, compose
 
 
 class VCR:
@@ -50,6 +47,8 @@ class VCR:
         cassette_library_dir=None,
         func_path_generator=None,
         decode_compressed_response=False,
+        record_on_exception=True,
+        drop_unused_requests=False,
     ):
         self.serializer = serializer
         self.match_on = match_on
@@ -81,13 +80,15 @@ class VCR:
         self.path_transformer = path_transformer
         self.func_path_generator = func_path_generator
         self.decode_compressed_response = decode_compressed_response
+        self.record_on_exception = record_on_exception
         self._custom_patches = tuple(custom_patches)
+        self.drop_unused_requests = drop_unused_requests
 
     def _get_serializer(self, serializer_name):
         try:
             serializer = self.serializers[serializer_name]
         except KeyError:
-            raise KeyError("Serializer {} doesn't exist or isn't registered".format(serializer_name))
+            raise KeyError(f"Serializer {serializer_name} doesn't exist or isn't registered") from None
         return serializer
 
     def _get_matchers(self, matcher_names):
@@ -96,11 +97,11 @@ class VCR:
             for m in matcher_names:
                 matchers.append(self.matchers[m])
         except KeyError:
-            raise KeyError("Matcher {} doesn't exist or isn't registered".format(m))
+            raise KeyError(f"Matcher {m} doesn't exist or isn't registered") from None
         return matchers
 
     def use_cassette(self, path=None, **kwargs):
-        if path is not None and not isinstance(path, str):
+        if path is not None and not isinstance(path, (str, Path)):
             function = path
             # Assume this is an attempt to decorate a function
             return self._use_cassette(**kwargs)(function)
@@ -124,6 +125,7 @@ class VCR:
         func_path_generator = kwargs.get("func_path_generator", self.func_path_generator)
         cassette_library_dir = kwargs.get("cassette_library_dir", self.cassette_library_dir)
         additional_matchers = kwargs.get("additional_matchers", ())
+        record_on_exception = kwargs.get("record_on_exception", self.record_on_exception)
 
         if cassette_library_dir:
 
@@ -150,6 +152,8 @@ class VCR:
             "path_transformer": path_transformer,
             "func_path_generator": func_path_generator,
             "allow_playback_repeats": kwargs.get("allow_playback_repeats", False),
+            "record_on_exception": record_on_exception,
+            "drop_unused_requests": kwargs.get("drop_unused_requests", self.drop_unused_requests),
         }
         path = kwargs.get("path")
         if path:
@@ -159,7 +163,8 @@ class VCR:
     def _build_before_record_response(self, options):
         before_record_response = options.get("before_record_response", self.before_record_response)
         decode_compressed_response = options.get(
-            "decode_compressed_response", self.decode_compressed_response
+            "decode_compressed_response",
+            self.decode_compressed_response,
         )
         filter_functions = []
         if decode_compressed_response:
@@ -183,10 +188,12 @@ class VCR:
         filter_headers = options.get("filter_headers", self.filter_headers)
         filter_query_parameters = options.get("filter_query_parameters", self.filter_query_parameters)
         filter_post_data_parameters = options.get(
-            "filter_post_data_parameters", self.filter_post_data_parameters
+            "filter_post_data_parameters",
+            self.filter_post_data_parameters,
         )
         before_record_request = options.get(
-            "before_record_request", options.get("before_record", self.before_record_request)
+            "before_record_request",
+            options.get("before_record", self.before_record_request),
         )
         ignore_hosts = options.get("ignore_hosts", self.ignore_hosts)
         ignore_localhost = options.get("ignore_localhost", self.ignore_localhost)
@@ -196,12 +203,12 @@ class VCR:
         if filter_query_parameters:
             replacements = [p if isinstance(p, tuple) else (p, None) for p in filter_query_parameters]
             filter_functions.append(
-                functools.partial(filters.replace_query_parameters, replacements=replacements)
+                functools.partial(filters.replace_query_parameters, replacements=replacements),
             )
         if filter_post_data_parameters:
             replacements = [p if isinstance(p, tuple) else (p, None) for p in filter_post_data_parameters]
             filter_functions.append(
-                functools.partial(filters.replace_post_data_parameters, replacements=replacements)
+                functools.partial(filters.replace_post_data_parameters, replacements=replacements),
             )
 
         hosts_to_ignore = set(ignore_hosts)
@@ -216,7 +223,7 @@ class VCR:
             filter_functions.extend(before_record_request)
 
         def before_record_request(request):
-            request = copy.copy(request)
+            request = copy.deepcopy(request)
             for function in filter_functions:
                 if request is None:
                     break
@@ -250,5 +257,5 @@ class VCR:
 
     def test_case(self, predicate=None):
         predicate = predicate or self.is_test_method
-        # TODO: Remove this reference to `six` in favor of the Python3 equivalent
-        return six.with_metaclass(auto_decorate(self.use_cassette, predicate))
+        metaclass = auto_decorate(self.use_cassette, predicate)
+        return metaclass("temporary_class", (), {})

vcr/errors.py

@@ -13,30 +13,29 @@ class CannotOverwriteExistingCassetteException(Exception):
         best_matches = cassette.find_requests_with_most_matches(failed_request)
         if best_matches:
             # Build a comprehensible message to put in the exception.
-            best_matches_msg = "Found {} similar requests with {} different matcher(s) :\n".format(
-                len(best_matches), len(best_matches[0][2])
+            best_matches_msg = (
+                f"Found {len(best_matches)} similar requests "
+                f"with {len(best_matches[0][2])} different matcher(s) :\n"
             )
 
             for idx, best_match in enumerate(best_matches, start=1):
                 request, succeeded_matchers, failed_matchers_assertion_msgs = best_match
                 best_matches_msg += (
-                    "\n%s - (%r).\n"
-                    "Matchers succeeded : %s\n"
-                    "Matchers failed :\n" % (idx, request, succeeded_matchers)
+                    f"\n{idx} - ({request!r}).\n"
+                    f"Matchers succeeded : {succeeded_matchers}\n"
+                    "Matchers failed :\n"
                 )
                 for failed_matcher, assertion_msg in failed_matchers_assertion_msgs:
-                    best_matches_msg += "%s - assertion failure :\n" "%s\n" % (failed_matcher, assertion_msg)
+                    best_matches_msg += f"{failed_matcher} - assertion failure :\n{assertion_msg}\n"
         else:
             best_matches_msg = "No similar requests, that have not been played, found."
         return (
-            "Can't overwrite existing cassette (%r) in "
-            "your current record mode (%r).\n"
-            "No match for the request (%r) was found.\n"
-            "%s" % (cassette._path, cassette.record_mode, failed_request, best_matches_msg)
+            f"Can't overwrite existing cassette ({cassette._path!r}) in "
+            f"your current record mode ({cassette.record_mode!r}).\n"
+            f"No match for the request ({failed_request!r}) was found.\n"
+            f"{best_matches_msg}"
         )
 
 
 class UnhandledHTTPRequestError(KeyError):
     """Raised when a cassette does not contain the request we want."""
-
-    pass

vcr/filters.py

@@ -1,8 +1,8 @@
-from io import BytesIO
-from urllib.parse import urlparse, urlencode, urlunparse
 import copy
 import json
 import zlib
+from io import BytesIO
+from urllib.parse import urlencode, urlparse, urlunparse
 
 from .util import CaseInsensitiveDict
 
@@ -95,7 +95,7 @@ def replace_post_data_parameters(request, replacements):
                         new_body[k] = rv
             request.body = new_body
         elif request.headers.get("Content-Type") == "application/json":
-            json_data = json.loads(request.body.decode("utf-8"))
+            json_data = json.loads(request.body)
             for k, rv in replacements.items():
                 if k in json_data:
                     ov = json_data.pop(k)
@@ -150,10 +150,18 @@ def decode_response(response):
         """Returns decompressed body according to encoding using zlib.
         to (de-)compress gzip format, use wbits = zlib.MAX_WBITS | 16
         """
+        if not body:
+            return ""
         if encoding == "gzip":
+            try:
                 return zlib.decompress(body, zlib.MAX_WBITS | 16)
+            except zlib.error:
+                return body  # assumes that the data was already decompressed
         else:  # encoding == 'deflate'
+            try:
                 return zlib.decompress(body)
+            except zlib.error:
+                return body  # assumes that the data was already decompressed
 
     # Deepcopy here in case `headers` contain objects that could
     # be mutated by a shallow copy and corrupt the real response.

vcr/matchers.py

@@ -1,55 +1,74 @@
 import json
+import logging
 import urllib
 import xmlrpc.client
-from .util import read_body
-import logging
+from string import hexdigits
 
+from .util import read_body
+
+_HEXDIG_CODE_POINTS: set[int] = {ord(s.encode("ascii")) for s in hexdigits}
 
 log = logging.getLogger(__name__)
 
 
 def method(r1, r2):
-    assert r1.method == r2.method, "{} != {}".format(r1.method, r2.method)
+    if r1.method != r2.method:
+        raise AssertionError(f"{r1.method} != {r2.method}")
 
 
 def uri(r1, r2):
-    assert r1.uri == r2.uri, "{} != {}".format(r1.uri, r2.uri)
+    if r1.uri != r2.uri:
+        raise AssertionError(f"{r1.uri} != {r2.uri}")
 
 
 def host(r1, r2):
-    assert r1.host == r2.host, "{} != {}".format(r1.host, r2.host)
+    if r1.host != r2.host:
+        raise AssertionError(f"{r1.host} != {r2.host}")
 
 
 def scheme(r1, r2):
-    assert r1.scheme == r2.scheme, "{} != {}".format(r1.scheme, r2.scheme)
+    if r1.scheme != r2.scheme:
+        raise AssertionError(f"{r1.scheme} != {r2.scheme}")
 
 
 def port(r1, r2):
-    assert r1.port == r2.port, "{} != {}".format(r1.port, r2.port)
+    if r1.port != r2.port:
+        raise AssertionError(f"{r1.port} != {r2.port}")
 
 
 def path(r1, r2):
-    assert r1.path == r2.path, "{} != {}".format(r1.path, r2.path)
+    if r1.path != r2.path:
+        raise AssertionError(f"{r1.path} != {r2.path}")
 
 
 def query(r1, r2):
-    assert r1.query == r2.query, "{} != {}".format(r1.query, r2.query)
+    if r1.query != r2.query:
+        raise AssertionError(f"{r1.query} != {r2.query}")
 
 
 def raw_body(r1, r2):
-    assert read_body(r1) == read_body(r2)
+    if read_body(r1) != read_body(r2):
+        raise AssertionError
 
 
 def body(r1, r2):
-    transformer = _get_transformer(r1)
-    r2_transformer = _get_transformer(r2)
-    if transformer != r2_transformer:
-        transformer = _identity
-    assert transformer(read_body(r1)) == transformer(read_body(r2))
+    transformers = list(_get_transformers(r1))
+    if transformers != list(_get_transformers(r2)):
+        transformers = []
+
+    b1 = read_body(r1)
+    b2 = read_body(r2)
+    for transform in transformers:
+        b1 = transform(b1)
+        b2 = transform(b2)
+
+    if b1 != b2:
+        raise AssertionError
 
 
 def headers(r1, r2):
-    assert r1.headers == r2.headers, "{} != {}".format(r1.headers, r2.headers)
+    if r1.headers != r2.headers:
+        raise AssertionError(f"{r1.headers} != {r2.headers}")
 
 
 def _header_checker(value, header="Content-Type"):
@@ -62,17 +81,71 @@ def _header_checker(value, header="Content-Type"):
     return checker
 
 
-def _transform_json(body):
-    # Request body is always a byte string, but json.loads() wants a text
-    # string. RFC 7159 says the default encoding is UTF-8 (although UTF-16
-    # and UTF-32 are also allowed: hmmmmm).
+def _dechunk(body):
+    if isinstance(body, str):
+        body = body.encode("utf-8")
+    elif isinstance(body, bytearray):
+        body = bytes(body)
+    elif hasattr(body, "__iter__"):
+        body = list(body)
         if body:
-        return json.loads(body.decode("utf-8"))
+            if isinstance(body[0], str):
+                body = ("".join(body)).encode("utf-8")
+            elif isinstance(body[0], bytes):
+                body = b"".join(body)
+            elif isinstance(body[0], int):
+                body = bytes(body)
+            else:
+                raise ValueError(f"Body chunk type {type(body[0])} not supported")
+        else:
+            body = None
+
+    if not isinstance(body, bytes):
+        return body
+
+    # Now decode chunked data format (https://en.wikipedia.org/wiki/Chunked_transfer_encoding)
+    # Example input: b"45\r\n<69 bytes>\r\n0\r\n\r\n" where int(b"45", 16) == 69.
+    CHUNK_GAP = b"\r\n"
+    BODY_LEN: int = len(body)
+
+    chunks: list[bytes] = []
+    pos: int = 0
+
+    while True:
+        for i in range(pos, BODY_LEN):
+            if body[i] not in _HEXDIG_CODE_POINTS:
+                break
+
+        if i == 0 or body[i : i + len(CHUNK_GAP)] != CHUNK_GAP:
+            if pos == 0:
+                return body  # i.e. assume non-chunk data
+            raise ValueError("Malformed chunked data")
+
+        size_bytes = int(body[pos:i], 16)
+        if size_bytes == 0:  # i.e. well-formed ending
+            return b"".join(chunks)
+
+        chunk_data_first = i + len(CHUNK_GAP)
+        chunk_data_after_last = chunk_data_first + size_bytes
+
+        if body[chunk_data_after_last : chunk_data_after_last + len(CHUNK_GAP)] != CHUNK_GAP:
+            raise ValueError("Malformed chunked data")
+
+        chunk_data = body[chunk_data_first:chunk_data_after_last]
+        chunks.append(chunk_data)
+
+        pos = chunk_data_after_last + len(CHUNK_GAP)
+
+
+def _transform_json(body):
+    if body:
+        return json.loads(body)
 
 
 _xml_header_checker = _header_checker("text/xml")
 _xmlrpc_header_checker = _header_checker("xmlrpc", header="User-Agent")
 _checker_transformer_pairs = (
+    (_header_checker("chunked", header="Transfer-Encoding"), _dechunk),
     (
         _header_checker("application/x-www-form-urlencoded"),
         lambda body: urllib.parse.parse_qs(body.decode("ascii")),
@@ -82,22 +155,16 @@ _checker_transformer_pairs = (
 )
 
 
-def _identity(x):
-    return x
-
-
-def _get_transformer(request):
+def _get_transformers(request):
     for checker, transformer in _checker_transformer_pairs:
         if checker(request.headers):
-            return transformer
-    else:
-        return _identity
+            yield transformer
 
 
 def requests_match(r1, r2, matchers):
-    successes, failures = get_matchers_results(r1, r2, matchers)
+    _, failures = get_matchers_results(r1, r2, matchers)
     if failures:
-        log.debug("Requests {} and {} differ.\n" "Failure details:\n" "{}".format(r1, r2, failures))
+        log.debug(f"Requests {r1} and {r2} differ.\nFailure details:\n{failures}")
     return len(failures) == 0
 
 

vcr/migration.py

@@ -7,7 +7,7 @@ It merges and deletes the request obsolete keys (protocol, host, port, path)
 into new 'uri' key.
 Usage::
 
-    python -m vcr.migration PATH
+    python3 -m vcr.migration PATH
 
 The PATH can be path to the directory with cassettes or cassette itself
 """
@@ -17,11 +17,12 @@ import os
 import shutil
 import sys
 import tempfile
+
 import yaml
 
-from .serializers import yamlserializer, jsonserializer
-from .serialize import serialize
 from . import request
+from .serialize import serialize
+from .serializers import jsonserializer, yamlserializer
 from .stubs.compat import get_httpmessage
 
 # Use the libYAML versions if possible
@@ -54,7 +55,7 @@ def build_uri(**parts):
     port = parts["port"]
     scheme = parts["protocol"]
     default_port = {"https": 443, "http": 80}[scheme]
-    parts["port"] = ":{}".format(port) if port != default_port else ""
+    parts["port"] = f":{port}" if port != default_port else ""
     return "{protocol}://{host}{port}{path}".format(**parts)
 
 
@@ -91,7 +92,7 @@ def migrate_json(in_fp, out_fp):
 
 
 def _list_of_tuples_to_dict(fs):
-    return {k: v for k, v in fs[0]}
+    return dict(fs[0])
 
 
 def _already_migrated(data):
@@ -117,7 +118,7 @@ def migrate(file_path, migration_fn):
     # because we assume that original files can be reverted
     # we will try to copy the content. (os.rename not needed)
     with tempfile.TemporaryFile(mode="w+") as out_fp:
-        with open(file_path, "r") as in_fp:
+        with open(file_path) as in_fp:
             if not migration_fn(in_fp, out_fp):
                 return False
         with open(file_path, "w") as in_fp:
@@ -129,7 +130,7 @@ def migrate(file_path, migration_fn):
 def try_migrate(path):
     if path.endswith(".json"):
         return migrate(path, migrate_json)
-    elif path.endswith(".yaml") or path.endswith(".yml"):
+    elif path.endswith((".yaml", ".yml")):
         return migrate(path, migrate_yml)
     return False
 
@@ -137,7 +138,7 @@ def try_migrate(path):
 def main():
     if len(sys.argv) != 2:
         raise SystemExit(
-            "Please provide path to cassettes directory or file. " "Usage: python -m vcr.migration PATH"
+            "Please provide path to cassettes directory or file. Usage: python3 -m vcr.migration PATH",
         )
 
     path = sys.argv[1]
@@ -149,7 +150,7 @@ def main():
     for file_path in files:
         migrated = try_migrate(file_path)
         status = "OK" if migrated else "FAIL"
-        sys.stderr.write("[{}] {}\n".format(status, file_path))
+        sys.stderr.write(f"[{status}] {file_path}\n")
     sys.stderr.write("Done.\n")
 
 

vcr/patch.py

@@ -1,13 +1,13 @@
 """Utilities for patching in cassettes"""
+
 import contextlib
 import functools
+import http.client as httplib
 import itertools
+import logging
 from unittest import mock
 
 from .stubs import VCRHTTPConnection, VCRHTTPSConnection
-import http.client as httplib
-
-import logging
 
 log = logging.getLogger(__name__)
 # Save some of the original types for the purposes of unpatching
@@ -16,42 +16,47 @@ _HTTPSConnection = httplib.HTTPSConnection
 
 # Try to save the original types for boto3
 try:
-    from botocore.awsrequest import AWSHTTPSConnection, AWSHTTPConnection
-except ImportError:
+    from botocore.awsrequest import AWSHTTPConnection, AWSHTTPSConnection
+except ImportError as e:
     try:
-        import botocore.vendored.requests.packages.urllib3.connectionpool as cpool
+        import botocore.vendored.requests  # noqa: F401
     except ImportError:  # pragma: no cover
         pass
     else:
-        _Boto3VerifiedHTTPSConnection = cpool.VerifiedHTTPSConnection
-        _cpoolBoto3HTTPConnection = cpool.HTTPConnection
-        _cpoolBoto3HTTPSConnection = cpool.HTTPSConnection
+        raise RuntimeError(
+            "vcrpy >=4.2.2 and botocore <1.11.0 are not compatible"
+            "; please upgrade botocore (or downgrade vcrpy)",
+        ) from e
 else:
     _Boto3VerifiedHTTPSConnection = AWSHTTPSConnection
     _cpoolBoto3HTTPConnection = AWSHTTPConnection
     _cpoolBoto3HTTPSConnection = AWSHTTPSConnection
 
 cpool = None
+conn = None
 # Try to save the original types for urllib3
 try:
+    import urllib3.connection as conn
     import urllib3.connectionpool as cpool
 except ImportError:  # pragma: no cover
     pass
 else:
-    _VerifiedHTTPSConnection = cpool.VerifiedHTTPSConnection
-    _cpoolHTTPConnection = cpool.HTTPConnection
-    _cpoolHTTPSConnection = cpool.HTTPSConnection
+    _VerifiedHTTPSConnection = conn.VerifiedHTTPSConnection
+    _connHTTPConnection = conn.HTTPConnection
+    _connHTTPSConnection = conn.HTTPSConnection
 
 # Try to save the original types for requests
 try:
-    if not cpool:
-        import requests.packages.urllib3.connectionpool as cpool
+    import requests
 except ImportError:  # pragma: no cover
     pass
 else:
-    _VerifiedHTTPSConnection = cpool.VerifiedHTTPSConnection
-    _cpoolHTTPConnection = cpool.HTTPConnection
-    _cpoolHTTPSConnection = cpool.HTTPSConnection
+    if requests.__build__ < 0x021602:
+        raise RuntimeError(
+            "vcrpy >=4.2.2 and requests <2.16.2 are not compatible"
+            "; please upgrade requests (or downgrade vcrpy)",
+        )
+
 
 # Try to save the original types for httplib2
 try:
@@ -63,14 +68,6 @@ else:
     _HTTPSConnectionWithTimeout = httplib2.HTTPSConnectionWithTimeout
     _SCHEME_TO_CONNECTION = httplib2.SCHEME_TO_CONNECTION
 
-# Try to save the original types for boto
-try:
-    import boto.https_connection
-except ImportError:  # pragma: no cover
-    pass
-else:
-    _CertValidatingHTTPSConnection = boto.https_connection.CertValidatingHTTPSConnection
-
 # Try to save the original types for Tornado
 try:
     import tornado.simple_httpclient
@@ -95,12 +92,12 @@ else:
 
 
 try:
-    import httpx
+    import httpcore
 except ImportError:  # pragma: no cover
     pass
 else:
-    _HttpxSyncClient_send = httpx.Client.send
-    _HttpxAsyncClient_send = httpx.AsyncClient.send
+    _HttpcoreConnectionPool_handle_request = httpcore.ConnectionPool.handle_request
+    _HttpcoreAsyncConnectionPool_handle_async_request = httpcore.AsyncConnectionPool.handle_async_request
 
 
 class CassettePatcherBuilder:
@@ -122,10 +119,9 @@ class CassettePatcherBuilder:
             self._boto3(),
             self._urllib3(),
             self._httplib2(),
-            self._boto(),
             self._tornado(),
             self._aiohttp(),
-            self._httpx(),
+            self._httpcore(),
             self._build_patchers_from_mock_triples(self._cassette.custom_patches),
         )
 
@@ -140,7 +136,9 @@ class CassettePatcherBuilder:
             return
 
         return mock.patch.object(
-            obj, patched_attribute, self._recursively_apply_get_cassette_subclass(replacement_class)
+            obj,
+            patched_attribute,
+            self._recursively_apply_get_cassette_subclass(replacement_class),
         )
 
     def _recursively_apply_get_cassette_subclass(self, replacement_dict_or_obj):
@@ -182,9 +180,7 @@ class CassettePatcherBuilder:
         bases = (base_class,)
         if not issubclass(base_class, object):  # Check for old style class
             bases += (object,)
-        return type(
-            "{}{}".format(base_class.__name__, self._cassette._path), bases, dict(cassette=self._cassette)
-        )
+        return type(f"{base_class.__name__}{self._cassette._path}", bases, {"cassette": self._cassette})
 
     @_build_patchers_from_mock_triples_decorator
     def _httplib(self):
@@ -196,27 +192,18 @@ class CassettePatcherBuilder:
             from .stubs import requests_stubs
         except ImportError:  # pragma: no cover
             return ()
-        return self._urllib3_patchers(cpool, requests_stubs)
+        return self._urllib3_patchers(cpool, conn, requests_stubs)
 
     @_build_patchers_from_mock_triples_decorator
     def _boto3(self):
-
         try:
             # botocore using awsrequest
             import botocore.awsrequest as cpool
-        except ImportError:  # pragma: no cover
-            try:
-                # botocore using vendored requests
-                import botocore.vendored.requests.packages.urllib3.connectionpool as cpool
         except ImportError:  # pragma: no cover
             pass
         else:
             from .stubs import boto3_stubs
 
-                yield self._urllib3_patchers(cpool, boto3_stubs)
-        else:
-            from .stubs import boto3_stubs
-
             log.debug("Patching boto3 cpool with %s", cpool)
             yield cpool.AWSHTTPConnectionPool, "ConnectionCls", boto3_stubs.VCRRequestsHTTPConnection
             yield cpool.AWSHTTPSConnectionPool, "ConnectionCls", boto3_stubs.VCRRequestsHTTPSConnection
@@ -255,12 +242,13 @@ class CassettePatcherBuilder:
 
     def _urllib3(self):
         try:
+            import urllib3.connection as conn
             import urllib3.connectionpool as cpool
         except ImportError:  # pragma: no cover
             return ()
         from .stubs import urllib3_stubs
 
-        return self._urllib3_patchers(cpool, urllib3_stubs)
+        return self._urllib3_patchers(cpool, conn, urllib3_stubs)
 
     @_build_patchers_from_mock_triples_decorator
     def _httplib2(self):
@@ -269,26 +257,18 @@ class CassettePatcherBuilder:
         except ImportError:  # pragma: no cover
             pass
         else:
-            from .stubs.httplib2_stubs import VCRHTTPConnectionWithTimeout
-            from .stubs.httplib2_stubs import VCRHTTPSConnectionWithTimeout
+            from .stubs.httplib2_stubs import VCRHTTPConnectionWithTimeout, VCRHTTPSConnectionWithTimeout
 
             yield cpool, "HTTPConnectionWithTimeout", VCRHTTPConnectionWithTimeout
             yield cpool, "HTTPSConnectionWithTimeout", VCRHTTPSConnectionWithTimeout
-            yield cpool, "SCHEME_TO_CONNECTION", {
+            yield (
+                cpool,
+                "SCHEME_TO_CONNECTION",
+                {
                     "http": VCRHTTPConnectionWithTimeout,
                     "https": VCRHTTPSConnectionWithTimeout,
-            }
-
-    @_build_patchers_from_mock_triples_decorator
-    def _boto(self):
-        try:
-            import boto.https_connection as cpool
-        except ImportError:  # pragma: no cover
-            pass
-        else:
-            from .stubs.boto_stubs import VCRCertValidatingHTTPSConnection
-
-            yield cpool, "CertValidatingHTTPSConnection", VCRCertValidatingHTTPSConnection
+                },
+            )
 
     @_build_patchers_from_mock_triples_decorator
     def _tornado(self):
@@ -324,31 +304,34 @@ class CassettePatcherBuilder:
             yield client.ClientSession, "_request", new_request
 
     @_build_patchers_from_mock_triples_decorator
-    def _httpx(self):
+    def _httpcore(self):
         try:
-            import httpx
+            import httpcore
         except ImportError:  # pragma: no cover
             return
         else:
-            from .stubs.httpx_stubs import async_vcr_send, sync_vcr_send
+            from .stubs.httpcore_stubs import vcr_handle_async_request, vcr_handle_request
 
-            new_async_client_send = async_vcr_send(self._cassette, _HttpxAsyncClient_send)
-            yield httpx.AsyncClient, "send", new_async_client_send
+            new_handle_async_request = vcr_handle_async_request(
+                self._cassette,
+                _HttpcoreAsyncConnectionPool_handle_async_request,
+            )
+            yield httpcore.AsyncConnectionPool, "handle_async_request", new_handle_async_request
 
-            new_sync_client_send = sync_vcr_send(self._cassette, _HttpxSyncClient_send)
-            yield httpx.Client, "send", new_sync_client_send
+            new_handle_request = vcr_handle_request(self._cassette, _HttpcoreConnectionPool_handle_request)
+            yield httpcore.ConnectionPool, "handle_request", new_handle_request
 
-    def _urllib3_patchers(self, cpool, stubs):
+    def _urllib3_patchers(self, cpool, conn, stubs):
         http_connection_remover = ConnectionRemover(
-            self._get_cassette_subclass(stubs.VCRRequestsHTTPConnection)
+            self._get_cassette_subclass(stubs.VCRRequestsHTTPConnection),
         )
         https_connection_remover = ConnectionRemover(
-            self._get_cassette_subclass(stubs.VCRRequestsHTTPSConnection)
+            self._get_cassette_subclass(stubs.VCRRequestsHTTPSConnection),
         )
         mock_triples = (
-            (cpool, "VerifiedHTTPSConnection", stubs.VCRRequestsHTTPSConnection),
-            (cpool, "HTTPConnection", stubs.VCRRequestsHTTPConnection),
-            (cpool, "HTTPSConnection", stubs.VCRRequestsHTTPSConnection),
+            (conn, "VerifiedHTTPSConnection", stubs.VCRRequestsHTTPSConnection),
+            (conn, "HTTPConnection", stubs.VCRRequestsHTTPConnection),
+            (conn, "HTTPSConnection", stubs.VCRRequestsHTTPSConnection),
             (cpool, "is_connection_dropped", mock.Mock(return_value=False)),  # Needed on Windows only
             (cpool.HTTPConnectionPool, "ConnectionCls", stubs.VCRRequestsHTTPConnection),
             (cpool.HTTPSConnectionPool, "ConnectionCls", stubs.VCRRequestsHTTPSConnection),
@@ -393,10 +376,6 @@ class ConnectionRemover:
         if isinstance(connection, self._connection_class):
             self._connection_pool_to_connections.setdefault(pool, set()).add(connection)
 
-    def remove_connection_to_pool_entry(self, pool, connection):
-        if isinstance(connection, self._connection_class):
-            self._connection_pool_to_connections[self._connection_class].remove(connection)
-
     def __enter__(self):
         return self
 
@@ -407,10 +386,13 @@ class ConnectionRemover:
                 connection = pool.pool.get()
                 if isinstance(connection, self._connection_class):
                     connections.remove(connection)
+                    connection.close()
                 else:
                     readd_connections.append(connection)
             for connection in readd_connections:
                 pool._put_conn(connection)
+            for connection in connections:
+                connection.close()
 
 
 def reset_patchers():
@@ -418,69 +400,23 @@ def reset_patchers():
     yield mock.patch.object(httplib, "HTTPSConnection", _HTTPSConnection)
 
     try:
-        import requests
-
-        if requests.__build__ < 0x021603:
-            # Avoid double unmock if requests 2.16.3
-            # First, this is pointless, requests.packages.urllib3 *IS* urllib3 (see packages.py)
-            # Second, this is unmocking twice the same classes with different namespaces
-            # and is creating weird issues and bugs:
-            # > AssertionError: assert <class 'urllib3.connection.HTTPConnection'>
-            # >   is <class 'requests.packages.urllib3.connection.HTTPConnection'>
-            # This assert should work!!!
-            # Note that this also means that now, requests.packages is never imported
-            # if requests 2.16.3 or greater is used with VCRPy.
-            import requests.packages.urllib3.connectionpool as cpool
-        else:
-            raise ImportError("Skip requests not vendored anymore")
-    except ImportError:  # pragma: no cover
-        pass
-    else:
-        # unpatch requests v1.x
-        yield mock.patch.object(cpool, "VerifiedHTTPSConnection", _VerifiedHTTPSConnection)
-        yield mock.patch.object(cpool, "HTTPConnection", _cpoolHTTPConnection)
-        # unpatch requests v2.x
-        if hasattr(cpool.HTTPConnectionPool, "ConnectionCls"):
-            yield mock.patch.object(cpool.HTTPConnectionPool, "ConnectionCls", _cpoolHTTPConnection)
-            yield mock.patch.object(cpool.HTTPSConnectionPool, "ConnectionCls", _cpoolHTTPSConnection)
-
-        if hasattr(cpool, "HTTPSConnection"):
-            yield mock.patch.object(cpool, "HTTPSConnection", _cpoolHTTPSConnection)
-
-    try:
+        import urllib3.connection as conn
         import urllib3.connectionpool as cpool
     except ImportError:  # pragma: no cover
         pass
     else:
-        yield mock.patch.object(cpool, "VerifiedHTTPSConnection", _VerifiedHTTPSConnection)
-        yield mock.patch.object(cpool, "HTTPConnection", _cpoolHTTPConnection)
-        yield mock.patch.object(cpool, "HTTPSConnection", _cpoolHTTPSConnection)
+        yield mock.patch.object(conn, "VerifiedHTTPSConnection", _VerifiedHTTPSConnection)
+        yield mock.patch.object(conn, "HTTPConnection", _connHTTPConnection)
+        yield mock.patch.object(conn, "HTTPSConnection", _connHTTPSConnection)
         if hasattr(cpool.HTTPConnectionPool, "ConnectionCls"):
-            yield mock.patch.object(cpool.HTTPConnectionPool, "ConnectionCls", _cpoolHTTPConnection)
-            yield mock.patch.object(cpool.HTTPSConnectionPool, "ConnectionCls", _cpoolHTTPSConnection)
+            yield mock.patch.object(cpool.HTTPConnectionPool, "ConnectionCls", _connHTTPConnection)
+            yield mock.patch.object(cpool.HTTPSConnectionPool, "ConnectionCls", _connHTTPSConnection)
 
     try:
         # unpatch botocore with awsrequest
         import botocore.awsrequest as cpool
-    except ImportError:  # pragma: no cover
-        try:
-            # unpatch botocore with vendored requests
-            import botocore.vendored.requests.packages.urllib3.connectionpool as cpool
     except ImportError:  # pragma: no cover
         pass
-        else:
-            # unpatch requests v1.x
-            yield mock.patch.object(cpool, "VerifiedHTTPSConnection", _Boto3VerifiedHTTPSConnection)
-            yield mock.patch.object(cpool, "HTTPConnection", _cpoolBoto3HTTPConnection)
-            # unpatch requests v2.x
-            if hasattr(cpool.HTTPConnectionPool, "ConnectionCls"):
-                yield mock.patch.object(cpool.HTTPConnectionPool, "ConnectionCls", _cpoolBoto3HTTPConnection)
-                yield mock.patch.object(
-                    cpool.HTTPSConnectionPool, "ConnectionCls", _cpoolBoto3HTTPSConnection
-                )
-
-            if hasattr(cpool, "HTTPSConnection"):
-                yield mock.patch.object(cpool, "HTTPSConnection", _cpoolBoto3HTTPSConnection)
     else:
         if hasattr(cpool.AWSHTTPConnectionPool, "ConnectionCls"):
             yield mock.patch.object(cpool.AWSHTTPConnectionPool, "ConnectionCls", _cpoolBoto3HTTPConnection)
@@ -498,13 +434,6 @@ def reset_patchers():
         yield mock.patch.object(cpool, "HTTPSConnectionWithTimeout", _HTTPSConnectionWithTimeout)
         yield mock.patch.object(cpool, "SCHEME_TO_CONNECTION", _SCHEME_TO_CONNECTION)
 
-    try:
-        import boto.https_connection as cpool
-    except ImportError:  # pragma: no cover
-        pass
-    else:
-        yield mock.patch.object(cpool, "CertValidatingHTTPSConnection", _CertValidatingHTTPSConnection)
-
     try:
         import tornado.simple_httpclient as simple
     except ImportError:  # pragma: no cover

vcr/persisters/filesystem.py

@@ -1,25 +1,40 @@
 # .. _persister_example:
 
-import os
-from ..serialize import serialize, deserialize
+from pathlib import Path
+
+from ..serialize import deserialize, serialize
+
+
+class CassetteNotFoundError(FileNotFoundError):
+    pass
+
+
+class CassetteDecodeError(ValueError):
+    pass
 
 
 class FilesystemPersister:
     @classmethod
     def load_cassette(cls, cassette_path, serializer):
+        cassette_path = Path(cassette_path)  # if cassette path is already Path this is no operation
+        if not cassette_path.is_file():
+            raise CassetteNotFoundError()
         try:
-            with open(cassette_path) as f:
-                cassette_content = f.read()
-        except OSError:
-            raise ValueError("Cassette not found.")
-        cassette = deserialize(cassette_content, serializer)
-        return cassette
+            with cassette_path.open() as f:
+                data = f.read()
+        except UnicodeDecodeError as err:
+            raise CassetteDecodeError("Can't read Cassette, Encoding is broken") from err
+
+        return deserialize(data, serializer)
 
     @staticmethod
     def save_cassette(cassette_path, cassette_dict, serializer):
         data = serialize(cassette_dict, serializer)
-        dirname, filename = os.path.split(cassette_path)
-        if dirname and not os.path.exists(dirname):
-            os.makedirs(dirname)
-        with open(cassette_path, "w") as f:
+        cassette_path = Path(cassette_path)  # if cassette path is already Path this is no operation
+
+        cassette_folder = cassette_path.parent
+        if not cassette_folder.exists():
+            cassette_folder.mkdir(parents=True)
+
+        with cassette_path.open("w") as f:
             f.write(data)

vcr/request.py

@@ -1,8 +1,10 @@
-import warnings
-from io import BytesIO
-from urllib.parse import urlparse, parse_qsl
-from .util import CaseInsensitiveDict
 import logging
+import warnings
+from contextlib import suppress
+from io import BytesIO
+from urllib.parse import parse_qsl, urlparse
+
+from .util import CaseInsensitiveDict, _is_nonsequence_iterator
 
 log = logging.getLogger(__name__)
 
@@ -16,13 +18,25 @@ class Request:
         self.method = method
         self.uri = uri
         self._was_file = hasattr(body, "read")
+        self._was_iter = _is_nonsequence_iterator(body)
         if self._was_file:
             self.body = body.read()
+        elif self._was_iter:
+            self.body = list(body)
         else:
             self.body = body
         self.headers = headers
         log.debug("Invoking Request %s", self.uri)
 
+    @property
+    def uri(self):
+        return self._uri
+
+    @uri.setter
+    def uri(self, uri):
+        self._uri = uri
+        self.parsed_uri = urlparse(uri)
+
     @property
     def headers(self):
         return self._headers
@@ -35,7 +49,11 @@ class Request:
 
     @property
     def body(self):
-        return BytesIO(self._body) if self._was_file else self._body
+        if self._was_file:
+            return BytesIO(self._body)
+        if self._was_iter:
+            return iter(self._body)
+        return self._body
 
     @body.setter
     def body(self, value):
@@ -45,37 +63,36 @@ class Request:
 
     def add_header(self, key, value):
         warnings.warn(
-            "Request.add_header is deprecated. " "Please assign to request.headers instead.",
+            "Request.add_header is deprecated. Please assign to request.headers instead.",
             DeprecationWarning,
+            stacklevel=2,
         )
         self.headers[key] = value
 
     @property
     def scheme(self):
-        return urlparse(self.uri).scheme
+        return self.parsed_uri.scheme
 
     @property
     def host(self):
-        return urlparse(self.uri).hostname
+        return self.parsed_uri.hostname
 
     @property
     def port(self):
-        parse_uri = urlparse(self.uri)
-        port = parse_uri.port
+        port = self.parsed_uri.port
         if port is None:
-            try:
-                port = {"https": 443, "http": 80}[parse_uri.scheme]
-            except KeyError:
-                pass
+            with suppress(KeyError):
+                port = {"https": 443, "http": 80}[self.parsed_uri.scheme]
+
         return port
 
     @property
     def path(self):
-        return urlparse(self.uri).path
+        return self.parsed_uri.path
 
     @property
     def query(self):
-        q = urlparse(self.uri).query
+        q = self.parsed_uri.query
         return sorted(parse_qsl(q))
 
     # alias for backwards compatibility
@@ -89,7 +106,7 @@ class Request:
         return self.scheme
 
     def __str__(self):
-        return "<Request ({}) {}>".format(self.method, self.uri)
+        return f"<Request ({self.method}) {self.uri}>"
 
     def __repr__(self):
         return self.__str__()

vcr/serialize.py

@@ -1,7 +1,8 @@
-from vcr.serializers import compat
-from vcr.request import Request
 import yaml
 
+from vcr.request import Request
+from vcr.serializers import compat
+
 # version 1 cassettes started with VCR 1.0.x.
 # Before 1.0.x, there was no versioning.
 CASSETTE_FORMAT_VERSION = 1
@@ -27,7 +28,7 @@ def _warn_about_old_cassette_format():
     raise ValueError(
         "Your cassette files were generated in an older version "
         "of VCR. Delete your cassettes or run the migration script."
-        "See http://git.io/mHhLBg for more details."
+        "See http://git.io/mHhLBg for more details.",
     )
 
 
@@ -52,7 +53,7 @@ def serialize(cassette_dict, serializer):
             "request": compat.convert_to_unicode(request._to_dict()),
             "response": compat.convert_to_unicode(response),
         }
-        for request, response in zip(cassette_dict["requests"], cassette_dict["responses"])
+        for request, response in zip(cassette_dict["requests"], cassette_dict["responses"], strict=False)
     ]
     data = {"version": CASSETTE_FORMAT_VERSION, "interactions": interactions}
     return serializer.serialize(data)

vcr/serializers/compat.py

@@ -56,7 +56,7 @@ def convert_body_to_unicode(resp):
     If the request or responses body is bytes, decode it to a string
     (for python3 support)
     """
-    if type(resp) is not dict:
+    if not isinstance(resp, dict):
         # Some of the tests just serialize and deserialize a string.
         return _convert_string_to_unicode(resp)
     else:

vcr/serializers/jsonserializer.py

@@ -1,6 +1,3 @@
-try:
-    import simplejson as json
-except ImportError:
 import json
 
 
@@ -17,13 +14,5 @@ def serialize(cassette_dict):
 
     try:
         return json.dumps(cassette_dict, indent=4) + "\n"
-    except UnicodeDecodeError as original:  # py2
-        raise UnicodeDecodeError(
-            original.encoding,
-            b"Error serializing cassette to JSON",
-            original.start,
-            original.end,
-            original.args[-1] + error_message,
-        )
-    except TypeError:  # py3
-        raise TypeError(error_message)
+    except TypeError:
+        raise TypeError(error_message) from None

vcr/serializers/yamlserializer.py

@@ -2,9 +2,10 @@ import yaml
 
 # Use the libYAML versions if possible
 try:
-    from yaml import CLoader as Loader, CDumper as Dumper
+    from yaml import CDumper as Dumper
+    from yaml import CLoader as Loader
 except ImportError:
-    from yaml import Loader, Dumper
+    from yaml import Dumper, Loader
 
 
 def deserialize(cassette_string):

vcr/stubs/__init__.py

@@ -1,14 +1,13 @@
 """Stubs for patching HTTP and HTTPS requests"""
 
 import logging
-from http.client import (
-    HTTPConnection,
-    HTTPSConnection,
-    HTTPResponse,
-)
+from contextlib import suppress
+from http.client import HTTPConnection, HTTPResponse, HTTPSConnection
 from io import BytesIO
-from vcr.request import Request
+
 from vcr.errors import CannotOverwriteExistingCassetteException
+from vcr.request import Request
+
 from . import compat
 
 log = logging.getLogger(__name__)
@@ -49,8 +48,9 @@ def parse_headers(header_list):
 
 
 def serialize_headers(response):
+    headers = response.headers if response.msg is None else response.msg
     out = {}
-    for key, values in compat.get_headers(response.msg):
+    for key, values in compat.get_headers(headers):
         out.setdefault(key, [])
         out[key].extend(values)
     return out
@@ -67,8 +67,10 @@ class VCRHTTPResponse(HTTPResponse):
         self.reason = recorded_response["status"]["message"]
         self.status = self.code = recorded_response["status"]["code"]
         self.version = None
+        self.version_string = None
         self._content = BytesIO(self.recorded_response["body"]["string"])
         self._closed = False
+        self._original_response = self  # for requests.session.Session cookie extraction
 
         headers = self.recorded_response["headers"]
         # Since we are loading a response that has already been serialized, our
@@ -76,7 +78,7 @@ class VCRHTTPResponse(HTTPResponse):
         # libraries trying to process a chunked response.  By removing the
         # transfer-encoding: chunked header, this should cause the downstream
         # libraries to process this as a non-chunked response.
-        te_key = [h for h in headers.keys() if h.upper() == "TRANSFER-ENCODING"]
+        te_key = [h for h in headers if h.upper() == "TRANSFER-ENCODING"]
         if te_key:
             del headers[te_key[0]]
         self.headers = self.msg = parse_headers(headers)
@@ -87,12 +89,15 @@ class VCRHTTPResponse(HTTPResponse):
     def closed(self):
         # in python3, I can't change the value of self.closed.  So I'
         # twiddling self._closed and using this property to shadow the real
-        # self.closed from the superclas
+        # self.closed from the superclass
         return self._closed
 
     def read(self, *args, **kwargs):
         return self._content.read(*args, **kwargs)
 
+    def read1(self, *args, **kwargs):
+        return self._content.read1(*args, **kwargs)
+
     def readall(self):
         return self._content.readall()
 
@@ -145,6 +150,35 @@ class VCRHTTPResponse(HTTPResponse):
     def readable(self):
         return self._content.readable()
 
+    @property
+    def length_remaining(self):
+        return self._content.getbuffer().nbytes - self._content.tell()
+
+    def get_redirect_location(self):
+        """
+        Returns (a) redirect location string if we got a redirect
+        status code and valid location, (b) None if redirect status and
+        no location, (c) False if not a redirect status code.
+        See https://urllib3.readthedocs.io/en/stable/reference/urllib3.response.html .
+        """
+        if not (300 <= self.status <= 399):
+            return False
+        return self.getheader("Location")
+
+    @property
+    def data(self):
+        return self._content.getbuffer().tobytes()
+
+    def drain_conn(self):
+        pass
+
+    def stream(self, amt=65536, decode_content=None):
+        while True:
+            b = self._content.read(amt)
+            yield b
+            if not b:
+                break
+
 
 class VCRConnection:
     # A reference to the cassette that's currently being patched in
@@ -154,28 +188,40 @@ class VCRConnection:
         """
         Returns empty string for the default port and ':port' otherwise
         """
-        port = self.real_connection.port
+        port = (
+            self.real_connection.port
+            if not self.real_connection._tunnel_host
+            else self.real_connection._tunnel_port
+        )
         default_port = {"https": 443, "http": 80}[self._protocol]
-        return ":{}".format(port) if port != default_port else ""
+        return f":{port}" if port != default_port else ""
+
+    def _real_host(self):
+        """Returns the request host"""
+        if self.real_connection._tunnel_host:
+            # The real connection is to an HTTPS proxy
+            return self.real_connection._tunnel_host
+        else:
+            return self.real_connection.host
 
     def _uri(self, url):
         """Returns request absolute URI"""
         if url and not url.startswith("/"):
             # Then this must be a proxy request.
             return url
-        uri = "{}://{}{}{}".format(self._protocol, self.real_connection.host, self._port_postfix(), url)
+        uri = f"{self._protocol}://{self._real_host()}{self._port_postfix()}{url}"
         log.debug("Absolute URI: %s", uri)
         return uri
 
     def _url(self, uri):
         """Returns request selector url from absolute URI"""
-        prefix = "{}://{}{}".format(self._protocol, self.real_connection.host, self._port_postfix())
+        prefix = f"{self._protocol}://{self._real_host()}{self._port_postfix()}"
         return uri.replace(prefix, "", 1)
 
     def request(self, method, url, body=None, headers=None, *args, **kwargs):
         """Persist the request metadata in self._vcr_request"""
         self._vcr_request = Request(method=method, uri=self._uri(url), body=body, headers=headers or {})
-        log.debug("Got {}".format(self._vcr_request))
+        log.debug(f"Got {self._vcr_request}")
 
         # Note: The request may not actually be finished at this point, so
         # I'm not sending the actual request until getresponse().  This
@@ -191,7 +237,7 @@ class VCRConnection:
         of putheader() calls.
         """
         self._vcr_request = Request(method=method, uri=self._uri(url), body="", headers={})
-        log.debug("Got {}".format(self._vcr_request))
+        log.debug(f"Got {self._vcr_request}")
 
     def putheader(self, header, *values):
         self._vcr_request.headers[header] = values
@@ -223,19 +269,20 @@ class VCRConnection:
         # Check to see if the cassette has a response for this request. If so,
         # then return it
         if self.cassette.can_play_response_for(self._vcr_request):
-            log.info("Playing response for {} from cassette".format(self._vcr_request))
+            log.info(f"Playing response for {self._vcr_request} from cassette")
             response = self.cassette.play_response(self._vcr_request)
             return VCRHTTPResponse(response)
         else:
             if self.cassette.write_protected and self.cassette.filter_request(self._vcr_request):
                 raise CannotOverwriteExistingCassetteException(
-                    cassette=self.cassette, failed_request=self._vcr_request
+                    cassette=self.cassette,
+                    failed_request=self._vcr_request,
                 )
 
             # Otherwise, we should send the request, then get the response
             # and return it.
 
-            log.info("{} not in cassette, sending to real server".format(self._vcr_request))
+            log.info(f"{self._vcr_request} not in cassette, sending to real server")
             # This is imported here to avoid circular import.
             # TODO(@IvanMalison): Refactor to allow normal import.
             from vcr.patch import force_reset
@@ -250,12 +297,13 @@ class VCRConnection:
 
             # get the response
             response = self.real_connection.getresponse()
+            response_data = response.data if hasattr(response, "data") else response.read()
 
             # put the response into the cassette
             response = {
                 "status": {"code": response.status, "message": response.reason},
                 "headers": serialize_headers(response),
-                "body": {"string": response.read()},
+                "body": {"string": response_data},
             }
             self.cassette.append(self._vcr_request, response)
         return VCRHTTPResponse(response)
@@ -323,12 +371,8 @@ class VCRConnection:
         TODO: Separately setting the attribute on the two instances is not
         ideal. We should switch to a proxying implementation.
         """
-        try:
+        with suppress(AttributeError):
             setattr(self.real_connection, name, value)
-        except AttributeError:
-            # raised if real_connection has not been set yet, such as when
-            # we're setting the real_connection itself for the first time
-            pass
 
         super().__setattr__(name, value)
 
@@ -355,6 +399,8 @@ class VCRHTTPConnection(VCRConnection):
 
     _baseclass = HTTPConnection
     _protocol = "http"
+    debuglevel = _baseclass.debuglevel
+    _http_vsn = _baseclass._http_vsn
 
 
 class VCRHTTPSConnection(VCRConnection):
@@ -363,3 +409,5 @@ class VCRHTTPSConnection(VCRConnection):
     _baseclass = HTTPSConnection
     _protocol = "https"
     is_verified = True
+    debuglevel = _baseclass.debuglevel
+    _http_vsn = _baseclass._http_vsn

vcr/stubs/aiohttp_stubs.py

@@ -1,15 +1,15 @@
 """Stubs for aiohttp HTTP clients"""
+
 import asyncio
 import functools
-import logging
 import json
-
-from aiohttp import ClientConnectionError, ClientResponse, RequestInfo, streams
-from aiohttp import hdrs, CookieJar
+import logging
+from collections.abc import Mapping
 from http.cookies import CookieError, Morsel, SimpleCookie
+
+from aiohttp import ClientConnectionError, ClientResponse, CookieJar, RequestInfo, hdrs, streams
 from aiohttp.helpers import strip_auth_from_url
 from multidict import CIMultiDict, CIMultiDictProxy, MultiDict
-from typing import Union, Mapping
 from yarl import URL
 
 from vcr.errors import CannotOverwriteExistingCassetteException
@@ -36,7 +36,7 @@ class MockClientResponse(ClientResponse):
             session=None,
         )
 
-    async def json(self, *, encoding="utf-8", loads=json.loads, **kwargs):  # NOQA: E999
+    async def json(self, *, encoding="utf-8", loads=json.loads, **kwargs):
         stripped = self._body.strip()
         if not stripped:
             return None
@@ -67,7 +67,7 @@ def build_response(vcr_request, vcr_response, history):
         headers=_deserialize_headers(vcr_request.headers),
         real_url=URL(vcr_request.url),
     )
-    response = MockClientResponse(vcr_request.method, URL(vcr_response.get("url")), request_info=request_info)
+    response = MockClientResponse(vcr_request.method, URL(vcr_request.url), request_info=request_info)
     response.status = vcr_response["status"]["code"]
     response._body = vcr_response["body"].get("string", b"")
     response.reason = vcr_response["status"]["message"]
@@ -163,8 +163,7 @@ async def record_response(cassette, vcr_request, response):
     vcr_response = {
         "status": {"code": response.status, "message": response.reason},
         "headers": _serialize_headers(response.headers),
-        "body": body,  # NOQA: E999
-        "url": str(response.url),
+        "body": body,
     }
 
     cassette.append(vcr_request, vcr_response)
@@ -177,14 +176,14 @@ async def record_responses(cassette, vcr_request, response):
     to the final destination.
     """
 
-    for past_response in response.history:
+    for i, past_response in enumerate(response.history):
         aiohttp_request = past_response.request_info
 
-        # No data because it's following a redirect.
         past_request = Request(
             aiohttp_request.method,
             str(aiohttp_request.url),
-            None,
+            # Record body of first request, rest are following a redirect.
+            None if i else vcr_request.body,
             _serialize_headers(aiohttp_request.headers),
         )
         await record_response(cassette, past_request, past_response)
@@ -230,7 +229,7 @@ def _build_cookie_header(session, cookies, cookie_header, url):
     return c.output(header="", sep=";").strip()
 
 
-def _build_url_with_params(url_str: str, params: Mapping[str, Union[str, int, float]]) -> URL:
+def _build_url_with_params(url_str: str, params: Mapping[str, str | int | float]) -> URL:
     # This code is basically a copy&paste of aiohttp.
     # https://github.com/aio-libs/aiohttp/blob/master/aiohttp/client_reqrep.py#L225
     url = URL(url_str)
@@ -262,7 +261,7 @@ def vcr_request(cassette, real_request):
         vcr_request = Request(method, str(request_url), data, _serialize_headers(headers))
 
         if cassette.can_play_response_for(vcr_request):
-            log.info("Playing response for {} from cassette".format(vcr_request))
+            log.info(f"Playing response for {vcr_request} from cassette")
             response = play_responses(cassette, vcr_request, kwargs)
             for redirect in response.history:
                 self._cookie_jar.update_cookies(redirect.cookies, redirect.url)
@@ -274,7 +273,7 @@ def vcr_request(cassette, real_request):
 
         log.info("%s not in cassette, sending to real server", vcr_request)
 
-        response = await real_request(self, method, url, **kwargs)  # NOQA: E999
+        response = await real_request(self, method, url, **kwargs)
         await record_responses(cassette, vcr_request, response)
         return response
 

vcr/stubs/boto3_stubs.py

@@ -1,18 +1,8 @@
 """Stubs for boto3"""
-try:
-    # boto using awsrequest
+
 from botocore.awsrequest import AWSHTTPConnection as HTTPConnection
 from botocore.awsrequest import AWSHTTPSConnection as VerifiedHTTPSConnection
 
-except ImportError:  # pragma: nocover
-    # boto using vendored requests
-    # urllib3 defines its own HTTPConnection classes, which boto3 goes ahead and assumes
-    # you're using.  It includes some polyfills for newer features missing in older pythons.
-    try:
-        from urllib3.connectionpool import HTTPConnection, VerifiedHTTPSConnection
-    except ImportError:  # pragma: nocover
-        from requests.packages.urllib3.connectionpool import HTTPConnection, VerifiedHTTPSConnection
-
 from ..stubs import VCRHTTPConnection, VCRHTTPSConnection
 
 

vcr/stubs/boto_stubs.py

@@ -1,8 +0,0 @@
-"""Stubs for boto"""
-
-from boto.https_connection import CertValidatingHTTPSConnection
-from ..stubs import VCRHTTPSConnection
-
-
-class VCRCertValidatingHTTPSConnection(VCRHTTPSConnection):
-    _baseclass = CertValidatingHTTPSConnection

vcr/stubs/compat.py

@@ -1,6 +1,5 @@
-from io import BytesIO
 import http.client
-
+from io import BytesIO
 
 """
 The python3 http.client api moved some stuff around, so this is an abstraction
@@ -13,7 +12,7 @@ def get_header(message, name):
 
 
 def get_header_items(message):
-    for (key, values) in get_headers(message):
+    for key, values in get_headers(message):
         for value in values:
             yield key, value
 

vcr/stubs/httpcore_stubs.py

@@ -0,0 +1,215 @@
+import asyncio
+import functools
+import logging
+from collections import defaultdict
+from collections.abc import AsyncIterable, Iterable
+
+from httpcore import Response
+from httpcore._models import ByteStream
+
+from vcr.errors import CannotOverwriteExistingCassetteException
+from vcr.filters import decode_response
+from vcr.request import Request as VcrRequest
+from vcr.serializers.compat import convert_body_to_bytes
+
+_logger = logging.getLogger(__name__)
+
+
+async def _convert_byte_stream(stream):
+    if isinstance(stream, Iterable):
+        return list(stream)
+
+    if isinstance(stream, AsyncIterable):
+        return [part async for part in stream]
+
+    raise TypeError(
+        f"_convert_byte_stream: stream must be Iterable or AsyncIterable, got {type(stream).__name__}",
+    )
+
+
+def _serialize_headers(real_response):
+    """
+    Some headers can appear multiple times, like "Set-Cookie".
+    Therefore serialize every header key to a list of values.
+    """
+
+    headers = defaultdict(list)
+
+    for name, value in real_response.headers:
+        headers[name.decode("ascii")].append(value.decode("ascii"))
+
+    return dict(headers)
+
+
+async def _serialize_response(real_response):
+    # The reason_phrase may not exist
+    try:
+        reason_phrase = real_response.extensions["reason_phrase"].decode("ascii")
+    except KeyError:
+        reason_phrase = None
+
+    # Reading the response stream consumes the iterator, so we need to restore it afterwards
+    content = b"".join(await _convert_byte_stream(real_response.stream))
+    real_response.stream = ByteStream(content)
+
+    return {
+        "status": {"code": real_response.status, "message": reason_phrase},
+        "headers": _serialize_headers(real_response),
+        "body": {"string": content},
+    }
+
+
+def _deserialize_headers(headers):
+    """
+    httpcore accepts headers as list of tuples of header key and value.
+    """
+
+    return [
+        (name.encode("ascii"), value.encode("ascii")) for name, values in headers.items() for value in values
+    ]
+
+
+def _deserialize_response(vcr_response):
+    # Cassette format generated for HTTPX requests by older versions of
+    # vcrpy. We restructure the content to resemble what a regular
+    # cassette looks like.
+    if "status_code" in vcr_response:
+        vcr_response = decode_response(
+            convert_body_to_bytes(
+                {
+                    "headers": vcr_response["headers"],
+                    "body": {"string": vcr_response["content"]},
+                    "status": {"code": vcr_response["status_code"]},
+                },
+            ),
+        )
+        extensions = None
+    else:
+        extensions = (
+            {"reason_phrase": vcr_response["status"]["message"].encode("ascii")}
+            if vcr_response["status"]["message"]
+            else None
+        )
+
+    return Response(
+        vcr_response["status"]["code"],
+        headers=_deserialize_headers(vcr_response["headers"]),
+        content=vcr_response["body"]["string"],
+        extensions=extensions,
+    )
+
+
+async def _make_vcr_request(real_request):
+    # Reading the request stream consumes the iterator, so we need to restore it afterwards
+    body = b"".join(await _convert_byte_stream(real_request.stream))
+    real_request.stream = ByteStream(body)
+
+    uri = bytes(real_request.url).decode("ascii")
+
+    # As per HTTPX: If there are multiple headers with the same key, then we concatenate them with commas
+    headers = defaultdict(list)
+
+    for name, value in real_request.headers:
+        headers[name.decode("ascii")].append(value.decode("ascii"))
+
+    headers = {name: ", ".join(values) for name, values in headers.items()}
+
+    return VcrRequest(real_request.method.decode("ascii"), uri, body, headers)
+
+
+async def _vcr_request(cassette, real_request):
+    vcr_request = await _make_vcr_request(real_request)
+
+    if cassette.can_play_response_for(vcr_request):
+        return vcr_request, _play_responses(cassette, vcr_request)
+
+    if cassette.write_protected and cassette.filter_request(vcr_request):
+        raise CannotOverwriteExistingCassetteException(
+            cassette=cassette,
+            failed_request=vcr_request,
+        )
+
+    _logger.info("%s not in cassette, sending to real server", vcr_request)
+
+    return vcr_request, None
+
+
+async def _record_responses(cassette, vcr_request, real_response):
+    cassette.append(vcr_request, await _serialize_response(real_response))
+
+
+def _play_responses(cassette, vcr_request):
+    vcr_response = cassette.play_response(vcr_request)
+    real_response = _deserialize_response(vcr_response)
+
+    return real_response
+
+
+async def _vcr_handle_async_request(
+    cassette,
+    real_handle_async_request,
+    self,
+    real_request,
+):
+    vcr_request, vcr_response = await _vcr_request(cassette, real_request)
+
+    if vcr_response:
+        return vcr_response
+
+    real_response = await real_handle_async_request(self, real_request)
+    await _record_responses(cassette, vcr_request, real_response)
+
+    return real_response
+
+
+def vcr_handle_async_request(cassette, real_handle_async_request):
+    @functools.wraps(real_handle_async_request)
+    def _inner_handle_async_request(self, real_request):
+        return _vcr_handle_async_request(
+            cassette,
+            real_handle_async_request,
+            self,
+            real_request,
+        )
+
+    return _inner_handle_async_request
+
+
+def _run_async_function(sync_func, *args, **kwargs):
+    """
+    Safely run an asynchronous function from a synchronous context.
+    Handles both cases:
+    - An event loop is already running.
+    - No event loop exists yet.
+    """
+    try:
+        asyncio.get_running_loop()
+    except RuntimeError:
+        return asyncio.run(sync_func(*args, **kwargs))
+    else:
+        # If inside a running loop, create a task and wait for it
+        return asyncio.ensure_future(sync_func(*args, **kwargs))
+
+
+def _vcr_handle_request(cassette, real_handle_request, self, real_request):
+    vcr_request, vcr_response = _run_async_function(
+        _vcr_request,
+        cassette,
+        real_request,
+    )
+
+    if vcr_response:
+        return vcr_response
+
+    real_response = real_handle_request(self, real_request)
+    _run_async_function(_record_responses, cassette, vcr_request, real_response)
+
+    return real_response
+
+
+def vcr_handle_request(cassette, real_handle_request):
+    @functools.wraps(real_handle_request)
+    def _inner_handle_request(self, real_request):
+        return _vcr_handle_request(cassette, real_handle_request, self, real_request)
+
+    return _inner_handle_request

vcr/stubs/httplib2_stubs.py

@@ -1,6 +1,7 @@
 """Stubs for httplib2"""
 
 from httplib2 import HTTPConnectionWithTimeout, HTTPSConnectionWithTimeout
+
 from ..stubs import VCRHTTPConnection, VCRHTTPSConnection
 
 
@@ -27,7 +28,6 @@ class VCRHTTPSConnectionWithTimeout(VCRHTTPSConnection, HTTPSConnectionWithTimeo
     _baseclass = HTTPSConnectionWithTimeout
 
     def __init__(self, *args, **kwargs):
-
         # Delete the keyword arguments that HTTPSConnection would not recognize
         safe_keys = {
             "host",

vcr/stubs/httpx_stubs.py

@@ -1,170 +0,0 @@
-import functools
-import logging
-from unittest.mock import patch, MagicMock
-
-import httpx
-from vcr.request import Request as VcrRequest
-from vcr.errors import CannotOverwriteExistingCassetteException
-import inspect
-
-_httpx_signature = inspect.signature(httpx.Client.request)
-
-try:
-    HTTPX_REDIRECT_PARAM = _httpx_signature.parameters["follow_redirects"]
-except KeyError:
-    HTTPX_REDIRECT_PARAM = _httpx_signature.parameters["allow_redirects"]
-
-
-_logger = logging.getLogger(__name__)
-
-
-def _transform_headers(httpx_response):
-    """
-    Some headers can appear multiple times, like "Set-Cookie".
-    Therefore transform to every header key to list of values.
-    """
-
-    out = {}
-    for key, var in httpx_response.headers.raw:
-        decoded_key = key.decode("utf-8")
-        out.setdefault(decoded_key, [])
-        out[decoded_key].append(var.decode("utf-8"))
-    return out
-
-
-def _to_serialized_response(httpx_response):
-    return {
-        "status_code": httpx_response.status_code,
-        "http_version": httpx_response.http_version,
-        "headers": _transform_headers(httpx_response),
-        "content": httpx_response.content.decode("utf-8", "ignore"),
-    }
-
-
-def _from_serialized_headers(headers):
-    """
-    httpx accepts headers as list of tuples of header key and value.
-    """
-
-    header_list = []
-    for key, values in headers.items():
-        for v in values:
-            header_list.append((key, v))
-    return header_list
-
-
-@patch("httpx.Response.close", MagicMock())
-@patch("httpx.Response.read", MagicMock())
-def _from_serialized_response(request, serialized_response, history=None):
-    content = serialized_response.get("content").encode()
-    response = httpx.Response(
-        status_code=serialized_response.get("status_code"),
-        request=request,
-        headers=_from_serialized_headers(serialized_response.get("headers")),
-        content=content,
-        history=history or [],
-    )
-    response._content = content
-    return response
-
-
-def _make_vcr_request(httpx_request, **kwargs):
-    body = httpx_request.read().decode("utf-8")
-    uri = str(httpx_request.url)
-    headers = dict(httpx_request.headers)
-    return VcrRequest(httpx_request.method, uri, body, headers)
-
-
-def _shared_vcr_send(cassette, real_send, *args, **kwargs):
-    real_request = args[1]
-
-    vcr_request = _make_vcr_request(real_request, **kwargs)
-
-    if cassette.can_play_response_for(vcr_request):
-        return vcr_request, _play_responses(cassette, real_request, vcr_request, args[0], kwargs)
-
-    if cassette.write_protected and cassette.filter_request(vcr_request):
-        raise CannotOverwriteExistingCassetteException(cassette=cassette, failed_request=vcr_request)
-
-    _logger.info("%s not in cassette, sending to real server", vcr_request)
-    return vcr_request, None
-
-
-def _record_responses(cassette, vcr_request, real_response):
-    for past_real_response in real_response.history:
-        past_vcr_request = _make_vcr_request(past_real_response.request)
-        cassette.append(past_vcr_request, _to_serialized_response(past_real_response))
-
-    if real_response.history:
-        # If there was a redirection keep we want the request which will hold the
-        # final redirect value
-        vcr_request = _make_vcr_request(real_response.request)
-
-    cassette.append(vcr_request, _to_serialized_response(real_response))
-    return real_response
-
-
-def _play_responses(cassette, request, vcr_request, client, kwargs):
-    history = []
-
-    allow_redirects = kwargs.get(
-        HTTPX_REDIRECT_PARAM.name,
-        HTTPX_REDIRECT_PARAM.default,
-    )
-    vcr_response = cassette.play_response(vcr_request)
-    response = _from_serialized_response(request, vcr_response)
-
-    while allow_redirects and 300 <= response.status_code <= 399:
-        next_url = response.headers.get("location")
-        if not next_url:
-            break
-
-        vcr_request = VcrRequest("GET", next_url, None, dict(response.headers))
-        vcr_request = cassette.find_requests_with_most_matches(vcr_request)[0][0]
-
-        history.append(response)
-        # add cookies from response to session cookie store
-        client.cookies.extract_cookies(response)
-
-        vcr_response = cassette.play_response(vcr_request)
-        response = _from_serialized_response(vcr_request, vcr_response, history)
-
-    return response
-
-
-async def _async_vcr_send(cassette, real_send, *args, **kwargs):
-    vcr_request, response = _shared_vcr_send(cassette, real_send, *args, **kwargs)
-    if response:
-        # add cookies from response to session cookie store
-        args[0].cookies.extract_cookies(response)
-        return response
-
-    real_response = await real_send(*args, **kwargs)
-    return _record_responses(cassette, vcr_request, real_response)
-
-
-def async_vcr_send(cassette, real_send):
-    @functools.wraps(real_send)
-    def _inner_send(*args, **kwargs):
-        return _async_vcr_send(cassette, real_send, *args, **kwargs)
-
-    return _inner_send
-
-
-def _sync_vcr_send(cassette, real_send, *args, **kwargs):
-    vcr_request, response = _shared_vcr_send(cassette, real_send, *args, **kwargs)
-    if response:
-        # add cookies from response to session cookie store
-        args[0].cookies.extract_cookies(response)
-        return response
-
-    real_response = real_send(*args, **kwargs)
-    return _record_responses(cassette, vcr_request, real_response)
-
-
-def sync_vcr_send(cassette, real_send):
-    @functools.wraps(real_send)
-    def _inner_send(*args, **kwargs):
-        return _sync_vcr_send(cassette, real_send, *args, **kwargs)
-
-    return _inner_send

vcr/stubs/requests_stubs.py

@@ -1,9 +1,6 @@
 """Stubs for requests"""
 
-try:
-    from urllib3.connectionpool import HTTPConnection, VerifiedHTTPSConnection
-except ImportError:
-    from requests.packages.urllib3.connectionpool import HTTPConnection, VerifiedHTTPSConnection
+from urllib3.connection import HTTPConnection, VerifiedHTTPSConnection
 
 from ..stubs import VCRHTTPConnection, VCRHTTPSConnection
 

vcr/stubs/tornado_stubs.py

@@ -1,4 +1,5 @@
 """Stubs for tornado HTTP clients"""
+
 import functools
 from io import BytesIO
 
@@ -29,9 +30,9 @@ def vcr_fetch_impl(cassette, real_fetch_impl):
                 request,
                 599,
                 error=Exception(
-                    "The request (%s) uses AsyncHTTPClient functionality "
+                    f"The request ({request!r}) uses AsyncHTTPClient functionality "
                     "that is not yet supported by VCR.py. Please make the "
-                    "request outside a VCR.py context." % repr(request)
+                    "request outside a VCR.py context.",
                 ),
                 request_time=self.io_loop.time() - request.start_time,
             )
@@ -65,14 +66,15 @@ def vcr_fetch_impl(cassette, real_fetch_impl):
                     request,
                     599,
                     error=CannotOverwriteExistingCassetteException(
-                        cassette=cassette, failed_request=vcr_request
+                        cassette=cassette,
+                        failed_request=vcr_request,
                     ),
                     request_time=self.io_loop.time() - request.start_time,
                 )
                 return callback(response)
 
             def new_callback(response):
-                headers = [(k, response.headers.get_list(k)) for k in response.headers.keys()]
+                headers = [(k, response.headers.get_list(k)) for k in response.headers]
 
                 vcr_response = {
                     "status": {"code": response.code, "message": response.reason},

vcr/stubs/urllib3_stubs.py

@@ -1,6 +1,7 @@
 """Stubs for urllib3"""
 
-from urllib3.connectionpool import HTTPConnection, VerifiedHTTPSConnection
+from urllib3.connection import HTTPConnection, VerifiedHTTPSConnection
+
 from ..stubs import VCRHTTPConnection, VCRHTTPSConnection
 
 # urllib3 defines its own HTTPConnection classes. It includes some polyfills

vcr/unittest.py

@@ -0,0 +1,39 @@
+import inspect
+import os
+import unittest
+
+from .config import VCR
+
+
+class VCRMixin:
+    """A TestCase mixin that provides VCR integration."""
+
+    vcr_enabled = True
+
+    def setUp(self):
+        super().setUp()
+        if self.vcr_enabled:
+            kwargs = self._get_vcr_kwargs()
+            myvcr = self._get_vcr(**kwargs)
+            cm = myvcr.use_cassette(self._get_cassette_name())
+            self.cassette = cm.__enter__()
+            self.addCleanup(cm.__exit__, None, None, None)
+
+    def _get_vcr(self, **kwargs):
+        if "cassette_library_dir" not in kwargs:
+            kwargs["cassette_library_dir"] = self._get_cassette_library_dir()
+        return VCR(**kwargs)
+
+    def _get_vcr_kwargs(self, **kwargs):
+        return kwargs
+
+    def _get_cassette_library_dir(self):
+        testdir = os.path.dirname(inspect.getfile(self.__class__))
+        return os.path.join(testdir, "cassettes")
+
+    def _get_cassette_name(self):
+        return f"{self.__class__.__name__}.{self._testMethodName}.yaml"
+
+
+class VCRTestCase(VCRMixin, unittest.TestCase):
+    pass

vcr/util.py

@@ -1,9 +1,5 @@
 import types
-
-try:
 from collections.abc import Mapping, MutableMapping
-except ImportError:
-    from collections import Mapping, MutableMapping
 
 
 # Shamelessly stolen from https://github.com/kennethreitz/requests/blob/master/requests/structures.py
@@ -31,7 +27,7 @@ class CaseInsensitiveDict(MutableMapping):
     """
 
     def __init__(self, data=None, **kwargs):
-        self._store = dict()
+        self._store = {}
         if data is None:
             data = {}
         self.update(data, **kwargs)
@@ -93,9 +89,28 @@ def compose(*functions):
     return composed
 
 
+def _is_nonsequence_iterator(obj):
+    return hasattr(obj, "__iter__") and not isinstance(
+        obj,
+        (bytearray, bytes, dict, list, str),
+    )
+
+
 def read_body(request):
     if hasattr(request.body, "read"):
         return request.body.read()
+    if _is_nonsequence_iterator(request.body):
+        body = list(request.body)
+        if body:
+            if isinstance(body[0], str):
+                return "".join(body).encode("utf-8")
+            elif isinstance(body[0], (bytes, bytearray)):
+                return b"".join(body)
+            elif isinstance(body[0], int):
+                return bytes(body)
+            else:
+                raise ValueError(f"Body type {type(body[0])} not supported")
+        return b""
     return request.body