mock.reset_mock()
不会重置副作用迭代器。有没有办法在不重新创建模拟的情况下执行此操作?
>>> from mock import MagicMock
>>> mock = MagicMock(side_effect = [1,2])
>>> mock(), mock()
(1, 2)
>>> mock()
Traceback (most recent call last):
File "<pyshell#114>", line 1, in <module>
mock()
File "C:\Python27\Lib\site-packages\mock.py", line 955, in __call__
return _mock_self._mock_call(*args, **kwargs)
File "C:\Python27\Lib\site-packages\mock.py", line 1013, in _mock_call
result = next(effect)
StopIteration
>>> mock.reset_mock()
>>> mock()
Traceback (most recent call last):
...
StopIteration
>>> mock = MagicMock(side_effect = [1,2])
>>> mock(), mock()
(1, 2)
>>>
目的是在后续测试中重用模拟,但我怀疑,像生成器一样,它不能重新启动。
所以(指向正确的方向后)(我迟到了)我查看了mock.py
并发现side_effect
是一个迭代器对象(不能重置一次耗尽):
def __set_side_effect(self, value):
value = _try_iter(value)
...
def _try_iter(obj):
...
try:
return iter(obj)
except TypeError:
# XXXX backwards compatibility
# but this will blow up on first call - so maybe we should fail early?
return obj
和def reset_mock()
没有解决副作用。
答案 0 :(得分:5)
正如user2357112所评论的那样,重新分配side_effect
将解决您的问题。
>>> from mock import MagicMock
>>>
>>> lst = [1, 2]
>>> mock = MagicMock(side_effect=lst)
>>> mock(), mock()
(1, 2)
>>> mock.side_effect = lst # <-------
>>> mock(), mock()
(1, 2)
答案 1 :(得分:-1)
请注意,自Python 3.6起,您可以使用以下命令重置模拟side_effect
和return_value
:
mock.reset_mock(return_value=True, side_effect=True)
来自the docs:
如果要重置return_value或side_effect,则将相应的参数传递为True。子模拟和返回值模拟(如果有)也将重置。