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vcrpy-unittest

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vcrpy-unittest

Python unittest integration for vcr.py

  • 0.1.7
  • PyPI
  • Socket score

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1

============== vcrpy-unittest

|PyPI| |Build Status| |Coverage Report| |Python Versions| |Gitter|

This package provides VCRTestCase for simple integration between VCR.py_ and Python's venerable unittest_.

Installation

Install from PyPI_:

.. code:: sh

pip install vcrpy-unittest

Usage

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


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