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This package provides VCRTestCase
for simple integration between
VCR.py
_ and Python's venerable unittest_.
Install from PyPI_:
.. code:: sh
pip install 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/agriffis/vcrpy-unittest/blob/master/vcr_unittest/testcase.py>
__
for the default implementations of these methods, and VCR.py
_ for more
information.
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'
Compatibility
-------------
``VCRTestCase`` supports a subset of the Python versions supported by VCR.py.
Specifically Python 2.6 is excluded, because it lacks ``TestCase.addCleanup``.
Adding support for Python 2.6 would be pretty easy with ``tearDown`` but that
implementation is fragile because it depends on nothing else going wrong in the
inheritance chain. Rather than take on this additional complexity, Python 2.6 is
simply excluded for now.
License
-------
This library uses the MIT license, which is the same as VCR.py. See `LICENSE.txt
<https://github.com/agriffis/vcrpy-unittest/blob/master/LICENSE.txt>`__ for more
details.
Acknowledgements
----------------
Thanks to `@kevin1024`_ for `VCR.py`_, and to `@IvanMalison`_ for his
constructive critique on this package. Also thanks to `@nedbat`_ for his `post
regarding unittest and context managers
<http://nedbatchelder.com/blog/201508/using_context_managers_in_test_setup.html>`__,
and to `@davepeck`_ for `httreplay <https://github.com/davepeck/httreplay>`__
which served me well for so long.
.. _PyPI: https://pypi.python.org/pypi/vcrpy-unittest
.. _VCR.py: https://github.com/kevin1024/vcrpy
.. _unittest: https://docs.python.org/2/library/unittest.html
.. _@kevin1024: https://github.com/kevin1024
.. _@IvanMalison: https://github.com/IvanMalison
.. _@nedbat: https://github.com/nedbat
.. _@davepeck: https://github.com/davepeck
.. |Build Status| image:: https://img.shields.io/travis/agriffis/vcrpy-unittest/master.svg?style=plastic
:target: https://travis-ci.org/agriffis/vcrpy-unittest?branch=master
.. |Coverage Report| image:: https://img.shields.io/codecov/c/github/agriffis/vcrpy-unittest/master.svg?style=plastic
:target: https://codecov.io/gh/agriffis/vcrpy-unittest/branch/master
.. |PyPI| image:: https://img.shields.io/pypi/v/vcrpy-unittest.svg?style=plastic
:target: PyPI_
.. |Python Versions| image:: https://img.shields.io/pypi/pyversions/vcrpy-unittest.svg?style=plastic
:target: PyPI_
.. |Gitter| image:: https://img.shields.io/badge/gitter-join%20chat%20%E2%86%92-green.svg?style=plastic
:target: https://gitter.im/kevin1024/vcrpy
FAQs
Python unittest integration for vcr.py
We found that vcrpy-unittest demonstrated a healthy version release cadence and project activity because the last version was released less than a year ago. It has 1 open source maintainer collaborating on the project.
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