Okay, now this was an interesting exploration into CopyingMock, class instances, and such of that. Why is it that you can’t mock the class and have the members mocked correctly too?
# This fails.
with patch(__name__ + '.MyTest.get', new_callable=CopyingMock
) as mock_get:
x = MyTest(1)
x.get(TEST_URL)
mock_get.assert_called_once_with(x, TEST_URL)
# This works.
with patch(__name__ + '.MyTest.get', new_callable=CopyingMock
) as mock_get:
x = MyTest(1)
x.get(TEST_URL)
mock_get.assert_called_once_with(TEST_URL)
# This works.
with patch(__name__ + '.MyTest.get') as mock_get:
x = MyTest(1)
x.get(TEST_URL)
mock_get.assert_called_once_with(TEST_URL)
Okay, let me explain what is going on here. I read the source code,
so I have something to reference. First of all, let’s note that we
are making assertions on how the function is called, so we technically
don’t need to setup a spec for the mocked functions because that is
the basic point of the assertions. Second, I have to note a
peculiarity of autospecing. Autospecing calls an internal function
named _set_signature() that is used to generate a lambda function
that verifies the function signature then calls the actual mock,
whereas a direct mock does not quite have the equivalent function.
That being said, I’m not exactly sure why setting the spec directly
must have different behavior than autospecing.