Python unittest.mock.Mock.assert_called_once用法及代码示例

用法:

assert_called_once()

断言模拟只被调用了一次。

>>> mock = Mock()
>>> mock.method()
<Mock name='mock.method()' id='...'>
>>> mock.method.assert_called_once()
>>> mock.method()
<Mock name='mock.method()' id='...'>
>>> mock.method.assert_called_once()
Traceback (most recent call last):
...
AssertionError: Expected 'method' to have been called once. Called 2 times.

3.6 版中的新函数。

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