Fix issue #36 - error message for unregistered matcher was broken

tests/integration/test_config.py

@@ -1,6 +1,7 @@
 import os
 import json
 import urllib2
+import pytest
 import vcr
 
 
@@ -45,3 +46,11 @@ def test_override_match_on(tmpdir):
 
     assert len(cass) == 1
     assert cass.play_count == 1
+
+
+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']):
+            pass

tests/integration/test_wild.py

@@ -46,6 +46,7 @@ def test_flickr_multipart_upload():
         _pretend_to_be_flickr_library()
         assert cass.play_count == 1
 
+
 def test_flickr_should_respond_with_200(tmpdir):
     testfile = str(tmpdir.join('flickr.yml'))
     with vcr.use_cassette(testfile):

tests/unit/test_cassettes.py

@@ -50,6 +50,7 @@ def test_cassette_len():
 def _mock_requests_match(request1, request2, matchers):
     return request1 == request2
 
+
 @mock.patch('vcr.cassette.requests_match', _mock_requests_match)
 def test_cassette_contains():
     a = Cassette('test')