python - 断言未使用 Mock 调用函数/方法

Question

我正在使用 Mock 库来测试我的应用程序，但我想断言某些函数没有被调用。模拟文档谈论像 mock.assert_call_with 和 mock.assert_call_once_with 这样的方法，但我没有找到像 mock.assert_not_call 这样的东西或与验证 mock 是否未调用。

我可以使用类似以下的内容，尽管它看起来既不酷也不像 Python:

def test_something:
    # some actions
    with patch('something') as my_var:
        try:
            # args are not important. func should never be called in this test
            my_var.assert_called_with(some, args)
        except AssertionError:
            pass  # this error being raised means it's ok
    # other stuff

任何想法如何做到这一点？

Answer 1

这应该适用于您的情况；

assert not my_var.called, 'method should not have been called'

sample ；

>>> mock=Mock()
>>> mock.a()
<Mock name='mock.a()' id='4349129872'>
>>> assert not mock.b.called, 'b was called and should not have been'
>>> assert not mock.a.called, 'a was called and should not have been'
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
AssertionError: a was called and should not have been