[3.11] gh-101100: Fix sphinx warnings in unittest.mock-examples.rst (GH-108810) (#108812)

(cherry picked from commit 5141b1ebe0)
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Nikita Sobolev 2023-09-02 16:38:59 +03:00 committed by GitHub
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@ -579,14 +579,14 @@ Partial mocking
In some tests I wanted to mock out a call to :meth:`datetime.date.today`
to return a known date, but I didn't want to prevent the code under test from
creating new date objects. Unfortunately :class:`datetime.date` is written in C, and
so I couldn't just monkey-patch out the static :meth:`date.today` method.
so I couldn't just monkey-patch out the static :meth:`datetime.date.today` method.
I found a simple way of doing this that involved effectively wrapping the date
class with a mock, but passing through calls to the constructor to the real
class (and returning real instances).
The :func:`patch decorator <patch>` is used here to
mock out the ``date`` class in the module under test. The :attr:`side_effect`
mock out the ``date`` class in the module under test. The :attr:`~Mock.side_effect`
attribute on the mock date class is then set to a lambda function that returns
a real date. When the mock date class is called a real date will be
constructed and returned by ``side_effect``. ::
@ -766,8 +766,8 @@ mock has a nice API for making assertions about how your mock objects are used.
>>> mock.foo_bar.assert_called_with('baz', spam='eggs')
If your mock is only being called once you can use the
:meth:`assert_called_once_with` method that also asserts that the
:attr:`call_count` is one.
:meth:`~Mock.assert_called_once_with` method that also asserts that the
:attr:`~Mock.call_count` is one.
>>> mock.foo_bar.assert_called_once_with('baz', spam='eggs')
>>> mock.foo_bar()
@ -835,7 +835,7 @@ One possibility would be for mock to copy the arguments you pass in. This
could then cause problems if you do assertions that rely on object identity
for equality.
Here's one solution that uses the :attr:`side_effect`
Here's one solution that uses the :attr:`~Mock.side_effect`
functionality. If you provide a ``side_effect`` function for a mock then
``side_effect`` will be called with the same args as the mock. This gives us an
opportunity to copy the arguments and store them for later assertions. In this
@ -971,7 +971,8 @@ We can do this with :class:`MagicMock`, which will behave like a dictionary,
and using :data:`~Mock.side_effect` to delegate dictionary access to a real
underlying dictionary that is under our control.
When the :meth:`__getitem__` and :meth:`__setitem__` methods of our ``MagicMock`` are called
When the :meth:`~object.__getitem__` and :meth:`~object.__setitem__` methods
of our ``MagicMock`` are called
(normal dictionary access) then ``side_effect`` is called with the key (and in
the case of ``__setitem__`` the value too). We can also control what is returned.