In my code I am using assert_any_call() to verify series of call that happens to the django model filter, Now I need to verify the reverse case of this like assert_not_called(args).
Is there any assert statement to achieve this in python?
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Possibly of help? stackoverflow.com/a/12187244/314291StuartLC– StuartLC2014-05-25 13:01:55 +00:00Commented May 25, 2014 at 13:01
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1I wanted to check calls with parameters.Vb407– Vb4072014-05-25 13:07:52 +00:00Commented May 25, 2014 at 13:07
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1 Answer
The simplest way is to use Mock.call_args_list:
assert call(None, a=1, b="") not in mocked_func.call_args_list, "Called with invalid args."
If you want a method, use:
class NotCalledMagicMock(unittest.mock.MagicMock):
def assert_not_called(_mock_self, *args, **kwargs):
self = _mock_self
if self.call_args is None:
return
expected = self._call_matcher((args, kwargs))
if any(self._call_matcher(ca) == expected for ca in self.call_args_list):
cause = expected if isinstance(expected, Exception) else None
raise AssertionError(
'%r found in call list' % (self._format_mock_call_signature(args, kwargs),)
) from cause
To use this class, put this decorator before your test function:
@unittest.mock.patch("unittest.mock.MagicMock", NotCalledMagicMock)
Or make your mocks using:
func_b_mock = NotCalledMagicMock()
To use the method (where func_b_mock is a mock generated by e.g. patch):
func_b_mock.assert_not_called([12], a=4)
When it fails, it raises an AssertionError like:
Traceback (most recent call last):
File "your_test.py", line 34, in <module>
test_a()
File "/usr/lib/python3.4/unittest/mock.py", line 1136, in patched
return func(*args, **keywargs)
File "your_test.py", line 33, in test_a
func_b_mock.assert_not_called([1])
File "your_test.py", line 20, in assert_not_called
) from cause
AssertionError: 'func_b([1])' found in call list
