3.0.1
-----

- Fix packaging issue where ``six`` was missed as a dependency.

3.0.0
-----

- Issue #35226: Recursively check arguments when testing for equality of
  :class:`unittest.mock.call` objects and add note that tracking of
  parameters used to create ancestors of mocks in ``mock_calls`` is not
  possible.

- Issue #31177: Fix bug that prevented using :meth:`reset_mock
  <unittest.mock.Mock.reset_mock>` on mock instances with deleted attributes

- Issue #26704: Added test demonstrating double-patching of an instance
  method.  Patch by Anthony Sottile.

- Issue #35500: Write expected and actual call parameters on separate lines
  in :meth:`unittest.mock.Mock.assert_called_with` assertion errors.
  Contributed by Susan Su.

- Issue #35330: When a :class:`Mock` instance was used to wrap an object, if
  `side_effect` is used in one of the mocks of it methods, don't call the
  original implementation and return the result of using the side effect the
  same way that it is done with return_value.

- Issue #30541: Add new function to seal a mock and prevent the
  automatically creation of child mocks. Patch by Mario Corchero.

- Issue #35022: :class:`unittest.mock.MagicMock` now supports the
  ``__fspath__`` method (from :class:`os.PathLike`).

- Issue #33516: :class:`unittest.mock.MagicMock` now supports the
  ``__round__`` magic method.

- Issue #35512: :func:`unittest.mock.patch.dict` used as a decorator with
  string target resolves the target during function call instead of during
  decorator construction. Patch by Karthikeyan Singaravelan.

- Issue #36366: Calling ``stop()`` on an unstarted or stopped
  :func:`unittest.mock.patch` object will now return `None` instead of
  raising :exc:`RuntimeError`, making the method idempotent. Patch
  byKarthikeyan Singaravelan.

- Issue #35357: Internal attributes' names of unittest.mock._Call and
  unittest.mock.MagicProxy (name, parent & from_kall) are now prefixed with
  _mock_ in order to prevent clashes with widely used object attributes.
  Fixed minor typo in test function name.

- Issue #20239: Allow repeated assignment deletion of
  :class:`unittest.mock.Mock` attributes. Patch by Pablo Galindo.

- Issue #35082: Don't return deleted attributes when calling dir on a
  :class:`unittest.mock.Mock`.

- Issue #0: Improved an error message when mock assert_has_calls fails.

- Issue #23078: Add support for :func:`classmethod` and :func:`staticmethod`
  to :func:`unittest.mock.create_autospec`.  Initial patch by Felipe Ochoa.

- Issue #21478: Calls to a child function created with
  :func:`unittest.mock.create_autospec` should propagate to the parent.
  Patch by Karthikeyan Singaravelan.

- Issue #36598: Fix ``isinstance`` check for Mock objects with spec when the
  code is executed under tracing. Patch by Karthikeyan Singaravelan.

- Issue #32933: :func:`unittest.mock.mock_open` now supports iteration over
  the file contents. Patch by Tony Flury.

- Issue #21269: Add ``args`` and ``kwargs`` properties to mock call objects.
  Contributed by Kumar Akshay.

- Issue #17185: Set ``__signature__`` on mock for :mod:`inspect` to get
  signature. Patch by Karthikeyan Singaravelan.

- Issue #35047: ``unittest.mock`` now includes mock calls in exception
  messages if ``assert_not_called``, ``assert_called_once``, or
  ``assert_called_once_with`` fails. Patch by Petter Strandmark.

- Issue #28380: unittest.mock Mock autospec functions now properly support
  assert_called, assert_not_called, and assert_called_once.
  
- Issue #28735: Fixed the comparison of mock.MagickMock with mock.ANY.

- Issue #20804: The unittest.mock.sentinel attributes now preserve their
  identity when they are copied or pickled.

- Issue #28961: Fix unittest.mock._Call helper: don't ignore the name parameter
  anymore. Patch written by Jiajun Huang.

- Issue #26750: unittest.mock.create_autospec() now works properly for
  subclasses of property() and other data descriptors.

- Issue #21271: New keyword only parameters in reset_mock call.

- Issue #26807: mock_open 'files' no longer error on readline at end of file.
  Patch from Yolanda Robla.

- Issue #25195: Fix a regression in mock.MagicMock. _Call is a subclass of
  tuple (changeset 3603bae63c13 only works for classes) so we need to
  implement __ne__ ourselves.  Patch by Andrew Plummer.

2.0.0 and earlier
-----------------

- Issue #26323: Add Mock.assert_called() and Mock.assert_called_once()
  methods to unittest.mock. Patch written by Amit Saha.

- Issue #22138: Fix mock.patch behavior when patching descriptors. Restore
  original values after patching. Patch contributed by Sean McCully.

- Issue #24857: Comparing call_args to a long sequence now correctly returns a
  boolean result instead of raising an exception.  Patch by A Kaptur.

- Issue #23004: mock_open() now reads binary data correctly when the type of
  read_data is bytes.  Initial patch by Aaron Hill.

- Issue #21750: mock_open.read_data can now be read from each instance, as it
  could in Python 3.3.

- Issue #18622: unittest.mock.mock_open().reset_mock would recurse infinitely.
  Patch from Nicola Palumbo and Laurent De Buyst.

- Issue #23661: unittest.mock side_effects can now be exceptions again. This
  was a regression vs Python 3.4. Patch from Ignacio Rossi

- Issue #23310: Fix MagicMock's initializer to work with __methods__, just
  like configure_mock().  Patch by Kasia Jachim.

- Issue #23568: Add rdivmod support to MagicMock() objects.
  Patch by Håkan Lövdahl.

- Issue #23581: Add matmul support to MagicMock. Patch by Håkan Lövdahl.

- Issue #23326: Removed __ne__ implementations.  Since fixing default __ne__
  implementation in issue #21408 they are redundant. *** NOT BACKPORTED ***

- Issue #21270: We now override tuple methods in mock.call objects so that
  they can be used as normal call attributes.

- Issue #21256: Printout of keyword args should be in deterministic order in
  a mock function call. This will help to write better doctests.

- Issue #21262: New method assert_not_called for Mock.
  It raises AssertionError if the mock has been called.

- Issue #21238: New keyword argument `unsafe` to Mock. It raises
  `AttributeError` incase of an attribute startswith assert or assret.

- Issue #21239: patch.stopall() didn't work deterministically when the same
  name was patched more than once.

- Issue #21222: Passing name keyword argument to mock.create_autospec now
  works.

- Issue #17826: setting an iterable side_effect on a mock function created by
  create_autospec now works. Patch by Kushal Das.

- Issue #17826: setting an iterable side_effect on a mock function created by
  create_autospec now works. Patch by Kushal Das.

- Issue #20968: unittest.mock.MagicMock now supports division.
  Patch by Johannes Baiter.

- Issue #20189: unittest.mock now no longer assumes that any object for
  which it could get an inspect.Signature is a callable written in Python.
  Fix courtesy of Michael Foord.

- Issue #17467: add readline and readlines support to mock_open in
  unittest.mock.

- Issue #17015: When it has a spec, a Mock object now inspects its signature
  when matching calls, so that arguments can be matched positionally or
  by name.

- Issue #15323: improve failure message of Mock.assert_called_once_with

- Issue #14857: fix regression in references to PEP 3135 implicit __class__
  closure variable (Reopens issue #12370)

- Issue #14295: Add unittest.mock