version bump to v4.4.0

Replace `assert` with `raise AssertionError`

.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-latest
+
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v3
+      - name: Codespell
+        uses: codespell-project/actions-codespell@v2

.github/workflows/main.yml

@@ -25,11 +25,19 @@ jobs:
 
       - name: Install project dependencies
         run: |
-          pip install --upgrade pip
+          pip3 install --upgrade pip
-          pip install codecov tox tox-gh-actions
+          pip3 install codecov tox tox-gh-actions
 
-      - name: Run tests with tox
+      - name: Run online tests with tox
-        run: tox
+        run: tox -- -m online
+
+      - name: Run offline tests with tox with no access to the Internet
+        run: |
+          # We're using unshare to take Internet access
+          # away from tox 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; tox -- -m "not online"'
 
       - name: Run coverage
         run: codecov

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
         """

docs/changelog.rst

@@ -7,6 +7,17 @@ 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.
 
+-  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 compatability 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.

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/
 
@@ -127,7 +127,7 @@ in this example::
     eval "$(pyenv init -)"
 
     # Setup your local system tox tooling
-    pip install tox tox-pyenv
+    pip3 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

docs/installation.rst

@@ -4,7 +4,7 @@ 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
 -------------
@@ -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
+     pip3 uninstall pyyaml
-     pip --no-cache-dir install 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/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,
+Inherit from ``VCRTestCase`` for automatic recording and playback of HTTP
-there's also a ``VCRTestCase`` provided separately by `vcrpy-unittest
+interactions.
-<https://github.com/agriffis/vcrpy-unittest>`__.
+
+.. 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

@@ -7,3 +7,14 @@ known_first_party = "vcrpy"
 multi_line_output = 3
 use_parentheses = true
 include_trailing_comma = true
+
+[tool.codespell]
+skip = '.git,*.pdf,*.svg,.tox'
+ignore-regex = "\\\\[fnrstv]"
+#
+# ignore-words-list = ''
+
+[tool.pytest.ini_options]
+markers = [
+    "online",
+]

runtests.sh

@@ -4,4 +4,4 @@
 # 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 $*
+REQUESTS_CA_BUNDLE=`python3 -m pytest_httpbin.certs` exec pytest "$@"

tests/integration/test_aiohttp.py

@@ -34,6 +34,7 @@ def post(url, output="text", **kwargs):
     return request("POST", url, output="text", **kwargs)
 
 
+@pytest.mark.online
 def test_status(tmpdir, mockbin_request_url):
     url = mockbin_request_url
 
@@ -46,6 +47,7 @@ def test_status(tmpdir, mockbin_request_url):
         assert cassette.play_count == 1
 
 
+@pytest.mark.online
 @pytest.mark.parametrize("auth", [None, aiohttp.BasicAuth("vcrpy", "test")])
 def test_headers(tmpdir, auth, mockbin_request_url):
     url = mockbin_request_url
@@ -63,6 +65,7 @@ def test_headers(tmpdir, auth, mockbin_request_url):
         assert "yarl.URL" not in cassette.data[0]
 
 
+@pytest.mark.online
 def test_case_insensitive_headers(tmpdir, mockbin_request_url):
     url = mockbin_request_url
 
@@ -76,6 +79,7 @@ def test_case_insensitive_headers(tmpdir, mockbin_request_url):
         assert cassette.play_count == 1
 
 
+@pytest.mark.online
 def test_text(tmpdir, mockbin_request_url):
     url = mockbin_request_url
 
@@ -88,6 +92,7 @@ def test_text(tmpdir, mockbin_request_url):
         assert cassette.play_count == 1
 
 
+@pytest.mark.online
 def test_json(tmpdir, mockbin_request_url):
     url = mockbin_request_url
     headers = {"Content-Type": "application/json"}
@@ -101,6 +106,7 @@ def test_json(tmpdir, mockbin_request_url):
         assert cassette.play_count == 1
 
 
+@pytest.mark.online
 def test_binary(tmpdir, mockbin_request_url):
     url = mockbin_request_url + "/image/png"
     with vcr.use_cassette(str(tmpdir.join("binary.yaml"))):
@@ -112,6 +118,7 @@ def test_binary(tmpdir, mockbin_request_url):
         assert cassette.play_count == 1
 
 
+@pytest.mark.online
 def test_stream(tmpdir, mockbin_request_url):
     url = mockbin_request_url
 
@@ -124,6 +131,7 @@ def test_stream(tmpdir, mockbin_request_url):
         assert cassette.play_count == 1
 
 
+@pytest.mark.online
 @pytest.mark.parametrize("body", ["data", "json"])
 def test_post(tmpdir, body, caplog, mockbin_request_url):
     caplog.set_level(logging.INFO)
@@ -149,6 +157,7 @@ def test_post(tmpdir, body, caplog, mockbin_request_url):
     ), "Log message not found."
 
 
+@pytest.mark.online
 def test_params(tmpdir, mockbin_request_url):
     url = mockbin_request_url + "?d=d"
     headers = {"Content-Type": "application/json"}
@@ -164,6 +173,7 @@ def test_params(tmpdir, mockbin_request_url):
         assert cassette.play_count == 1
 
 
+@pytest.mark.online
 def test_params_same_url_distinct_params(tmpdir, mockbin_request_url):
     url = mockbin_request_url
     headers = {"Content-Type": "application/json"}
@@ -183,6 +193,7 @@ def test_params_same_url_distinct_params(tmpdir, mockbin_request_url):
             get(url, output="text", params=other_params)
 
 
+@pytest.mark.online
 def test_params_on_url(tmpdir, mockbin_request_url):
     url = mockbin_request_url + "?a=1&b=foo"
     headers = {"Content-Type": "application/json"}
@@ -248,6 +259,7 @@ def test_aiohttp_test_client_json(aiohttp_client, tmpdir):
     assert cassette.play_count == 1
 
 
+@pytest.mark.online
 def test_redirect(tmpdir, mockbin):
     url = mockbin + "/redirect/302/2"
 
@@ -272,6 +284,7 @@ def test_redirect(tmpdir, mockbin):
     assert cassette_response.request_info.real_url == response.request_info.real_url
 
 
+@pytest.mark.online
 def test_not_modified(tmpdir, mockbin):
     """It doesn't try to redirect on 304"""
     url = mockbin + "/status/304"
@@ -289,6 +302,7 @@ def test_not_modified(tmpdir, mockbin):
         assert cassette.play_count == 1
 
 
+@pytest.mark.online
 def test_double_requests(tmpdir, mockbin_request_url):
     """We should capture, record, and replay all requests and response chains,
     even if there are duplicate ones.
@@ -404,6 +418,7 @@ def test_cookies_redirect(httpbin_both, httpbin_ssl_context, tmpdir):
     run_in_loop(run)
 
 
+@pytest.mark.online
 def test_not_allow_redirects(tmpdir, mockbin):
     url = mockbin + "/redirect/308/5"
     path = str(tmpdir.join("redirects.yaml"))

tests/integration/test_config.py

@@ -7,6 +7,7 @@ import pytest
 import vcr
 
 
+@pytest.mark.online
 def test_set_serializer_default_config(tmpdir, mockbin_request_url):
     my_vcr = vcr.VCR(serializer="json")
 
@@ -20,6 +21,7 @@ def test_set_serializer_default_config(tmpdir, mockbin_request_url):
         assert json.loads(file_content)
 
 
+@pytest.mark.online
 def test_default_set_cassette_library_dir(tmpdir, mockbin_request_url):
     my_vcr = vcr.VCR(cassette_library_dir=str(tmpdir.join("subdir")))
 
@@ -29,6 +31,7 @@ def test_default_set_cassette_library_dir(tmpdir, mockbin_request_url):
     assert os.path.exists(str(tmpdir.join("subdir").join("test.json")))
 
 
+@pytest.mark.online
 def test_override_set_cassette_library_dir(tmpdir, mockbin_request_url):
     my_vcr = vcr.VCR(cassette_library_dir=str(tmpdir.join("subdir")))
 
@@ -41,6 +44,7 @@ def test_override_set_cassette_library_dir(tmpdir, mockbin_request_url):
     assert not os.path.exists(str(tmpdir.join("subdir").join("test.json")))
 
 
+@pytest.mark.online
 def test_override_match_on(tmpdir, mockbin_request_url):
     my_vcr = vcr.VCR(match_on=["method"])
 
@@ -62,6 +66,7 @@ def test_missing_matcher():
             pass
 
 
+@pytest.mark.online
 def test_dont_record_on_exception(tmpdir, mockbin_request_url):
     my_vcr = vcr.VCR(record_on_exception=False)
 

tests/integration/test_disksaver.py

@@ -6,10 +6,13 @@ import os
 import time
 from urllib.request import urlopen
 
+import pytest
+
 # Internal imports
 import vcr
 
 
+@pytest.mark.online
 def test_disk_saver_nowrite(tmpdir, mockbin_request_url):
     """
     Ensure that when you close a cassette without changing it it doesn't
@@ -30,6 +33,7 @@ def test_disk_saver_nowrite(tmpdir, mockbin_request_url):
     assert last_mod == last_mod2
 
 
+@pytest.mark.online
 def test_disk_saver_write(tmpdir, mockbin_request_url):
     """
     Ensure that when you close a cassette after changing it it does

tests/integration/test_filter.py

@@ -142,3 +142,24 @@ def test_decompress_regular(tmpdir, httpbin):
         resp = urlopen(url).read()
         assert_cassette_has_one_response(cass)
     assert_is_json(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

@@ -56,6 +56,7 @@ def test_response_headers(tmpdir, httpbin_both):
         assert set(headers) == set(resp.items())
 
 
+@pytest.mark.online
 def test_effective_url(tmpdir):
     """Ensure that the effective_url is captured"""
     url = "http://mockbin.org/redirect/301"

tests/integration/test_httpx.py

@@ -87,6 +87,7 @@ def yml(tmpdir, request):
     return str(tmpdir.join(request.function.__name__ + ".yaml"))
 
 
+@pytest.mark.online
 def test_status(tmpdir, mockbin, do_request):
     url = mockbin
 
@@ -99,6 +100,7 @@ def test_status(tmpdir, mockbin, do_request):
         assert cassette.play_count == 1
 
 
+@pytest.mark.online
 def test_case_insensitive_headers(tmpdir, mockbin, do_request):
     url = mockbin
 
@@ -112,6 +114,7 @@ def test_case_insensitive_headers(tmpdir, mockbin, do_request):
         assert cassette.play_count == 1
 
 
+@pytest.mark.online
 def test_content(tmpdir, mockbin, do_request):
     url = mockbin
 
@@ -124,6 +127,7 @@ def test_content(tmpdir, mockbin, do_request):
         assert cassette.play_count == 1
 
 
+@pytest.mark.online
 def test_json(tmpdir, mockbin, do_request):
     url = mockbin + "/request"
 
@@ -138,6 +142,7 @@ def test_json(tmpdir, mockbin, do_request):
         assert cassette.play_count == 1
 
 
+@pytest.mark.online
 def test_params_same_url_distinct_params(tmpdir, mockbin, do_request):
     url = mockbin + "/request"
     headers = {"Content-Type": "application/json"}
@@ -158,6 +163,7 @@ def test_params_same_url_distinct_params(tmpdir, mockbin, do_request):
             do_request()("GET", url, params=params, headers=headers)
 
 
+@pytest.mark.online
 def test_redirect(mockbin, yml, do_request):
     url = mockbin + "/redirect/303/2"
 
@@ -184,6 +190,7 @@ def test_redirect(mockbin, yml, do_request):
     }
 
 
+@pytest.mark.online
 def test_work_with_gzipped_data(mockbin, do_request, yml):
     url = mockbin + "/gzip?foo=bar"
     headers = {"accept-encoding": "deflate, gzip"}
@@ -199,6 +206,7 @@ def test_work_with_gzipped_data(mockbin, do_request, yml):
         assert cassette.play_count == 1
 
 
+@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(do_request, yml, url):
     with vcr.use_cassette(yml):
@@ -231,6 +239,7 @@ def test_behind_proxy(do_request):
         assert cassette_response.request.url == response.request.url
 
 
+@pytest.mark.online
 def test_cookies(tmpdir, mockbin, do_request):
     def client_cookies(client):
         return [c for c in client.client.cookies]
@@ -268,6 +277,7 @@ def test_cookies(tmpdir, mockbin, do_request):
             assert client_cookies(new_client) == ["k1", "k2"]
 
 
+@pytest.mark.online
 def test_relative_redirects(tmpdir, scheme, do_request, mockbin):
     redirect_kwargs = {HTTPX_REDIRECT_PARAM.name: True}
 
@@ -286,6 +296,7 @@ def test_relative_redirects(tmpdir, scheme, do_request, mockbin):
         assert cassette.play_count == 3
 
 
+@pytest.mark.online
 def test_redirect_wo_allow_redirects(do_request, mockbin, yml):
     url = mockbin + "/redirect/308/5"
 

tests/integration/test_register_matcher.py

@@ -1,5 +1,7 @@
 from urllib.request import urlopen
 
+import pytest
+
 import vcr
 
 
@@ -11,6 +13,7 @@ def false_matcher(r1, r2):
     return False
 
 
+@pytest.mark.online
 def test_registered_true_matcher(tmpdir, mockbin_request_url):
     my_vcr = vcr.VCR()
     my_vcr.register_matcher("true", true_matcher)
@@ -26,6 +29,7 @@ def test_registered_true_matcher(tmpdir, mockbin_request_url):
         urlopen(mockbin_request_url)
 
 
+@pytest.mark.online
 def test_registered_false_matcher(tmpdir, mockbin_request_url):
     my_vcr = vcr.VCR()
     my_vcr.register_matcher("false", false_matcher)

tests/integration/test_register_persister.py

@@ -10,7 +10,7 @@ import vcr
 from vcr.persisters.filesystem import FilesystemPersister
 
 
-class CustomFilesystemPersister(object):
+class CustomFilesystemPersister:
     """Behaves just like default FilesystemPersister but adds .test extension
     to the cassette file"""
 

tests/integration/test_requests.py

@@ -144,6 +144,17 @@ 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
@@ -156,20 +167,40 @@ 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(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"))):
+    expected_response = requests.get(url)
-        response = requests.get(url)
+    expected_content = expected_response.content
-        assert_is_json(response.content)
+    assert expected_response.headers["content-encoding"] == "gzip"  # self-test
 
-    with vcr.use_cassette(str(tmpdir.join("gzip.yaml"))):
+    with vcr.use_cassette(
-        assert_is_json(response.content)
+        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):

tests/integration/test_urllib2.py

@@ -7,6 +7,7 @@ from urllib.request import urlopen
 
 import pytest_httpbin.certs
 from assertions import assert_cassette_has_one_response
+from pytest import mark
 
 # Internal imports
 import vcr
@@ -56,6 +57,7 @@ def test_response_headers(httpbin_both, tmpdir):
         assert sorted(open1) == sorted(open2)
 
 
+@mark.online
 def test_effective_url(tmpdir):
     """Ensure that the effective_url is captured"""
     url = "http://mockbin.org/redirect/301"

tests/integration/test_urllib3.py

@@ -97,6 +97,7 @@ def test_post(tmpdir, httpbin_both, verify_pool_mgr):
     assert req1 == req2
 
 
+@pytest.mark.online
 def test_redirects(tmpdir, verify_pool_mgr):
     """Ensure that we can handle redirects"""
     url = "http://mockbin.org/redirect/301"

tests/integration/test_wild.py

@@ -52,6 +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):
@@ -70,6 +71,7 @@ def test_cookies(tmpdir, httpbin):
         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.

tests/unit/test_filters.py

@@ -298,6 +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"
 
@@ -325,3 +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_response.py

@@ -93,7 +93,7 @@ def test_response_parses_correctly_and_fp_attribute_error_is_not_thrown():
         },
     }
     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]
     assert len(articles) > 1

tests/unit/test_stubs.py

@@ -1,5 +1,7 @@
 from unittest import mock
 
+from pytest import mark
+
 from vcr import mode
 from vcr.cassette import Cassette
 from vcr.stubs import VCRHTTPSConnection
@@ -11,6 +13,7 @@ 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")

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 dict(
+                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 dict(
+                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"illustrative examples" 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"illustrative examples" 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

vcr/__init__.py

@@ -4,7 +4,7 @@ from logging import NullHandler
 from .config import VCR
 from .record_mode import RecordMode as mode  # noqa import is not used in this file
 
-__version__ = "4.3.1"
+__version__ = "4.4.0"
 
 logging.getLogger(__name__).addHandler(NullHandler())
 

vcr/config.py

@@ -219,7 +219,7 @@ 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

vcr/filters.py

@@ -153,9 +153,15 @@ def decode_response(response):
         if not body:
             return ""
         if encoding == "gzip":
-            return zlib.decompress(body, zlib.MAX_WBITS | 16)
+            try:
+                return zlib.decompress(body, zlib.MAX_WBITS | 16)
+            except zlib.error:
+                return body  # assumes that the data was already decompressed
         else:  # encoding == 'deflate'
-            return zlib.decompress(body)
+            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

@@ -9,35 +9,43 @@ 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("{} != {}".format(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("{} != {}".format(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("{} != {}".format(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("{} != {}".format(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("{} != {}".format(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("{} != {}".format(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("{} != {}".format(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):
@@ -45,11 +53,13 @@ def body(r1, r2):
     r2_transformer = _get_transformer(r2)
     if transformer != r2_transformer:
         transformer = _identity
-    assert transformer(read_body(r1)) == transformer(read_body(r2))
+    if transformer(read_body(r1)) != transformer(read_body(r2)):
+        raise AssertionError
 
 
 def headers(r1, r2):
-    assert r1.headers == r2.headers, "{} != {}".format(r1.headers, r2.headers)
+    if r1.headers != r2.headers:
+        raise AssertionError("{} != {}".format(r1.headers, r2.headers))
 
 
 def _header_checker(value, header="Content-Type"):

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
 """
@@ -138,7 +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]

vcr/stubs/__init__.py

@@ -93,6 +93,9 @@ class VCRHTTPResponse(HTTPResponse):
     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()
 
@@ -167,6 +170,13 @@ class VCRHTTPResponse(HTTPResponse):
     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

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 "{0}.{1}.yaml".format(self.__class__.__name__, self._testMethodName)
+
+
+class VCRTestCase(VCRMixin, unittest.TestCase):
+    pass