def test_returns_mismatch_when_mock_has_been_called(self):
mock = Mock()
mock(1, 2, a=5)
matcher = MockNotCalled()
result = matcher.match(mock)
self.assertMismatch(result, "mock has been called")
def test_returns_none_mock_has_not_been_called(self):
mock = Mock()
matcher = MockNotCalled()
result = matcher.match(mock)
self.assertIsNone(result)
