How to call self in a mock method of an object in Python?

Question

I try to test some codes which don\'t return anything but save the result to the DB. By mocking the save method, I wish to check whether things have been processed correctly

Answer 1

You need autospec=True

def mock_save(self):
    assert self.attr == 'dest_val'
with mock.patch.object(Item, "save", autospec=True) as save:
    save.side_effect = mock_save
    func_to_call()