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[英]Mocking a function that is passed in as a parameter during a class variable initialization
[英]Mocking a class passed as argument
我有這樣的事情:
class ThisClass:
def my_method(self, param):
# Do normal stuff
pass
class OtherClass:
def my_method(self, param):
# Do crazy stuff
pass
def useful_function(some_class, some_param):
internal = some_class()
result = internal.my_method(some_param)
uses_result(result)
# The useful_function can be called with any of the classes
useful_function(ThisClass, 10)
我想要做的是檢驗是否my_method
被稱為內useful_function
。 我試圖模擬該類及其方法,但是沒有用:
# Inside the test class
def test_case(self):
MockSomeClass = mock.Mock()
MockSomeClass.my_method.return_value = 'Some useful answer'
useful_function(MockSomeClass, 100)
MockSomeClass.my_method.assert_called_once()
該錯誤取決於以下事實:我在uses_result
使用了my_method
的結果,但該uses_result
方法未按預期返回'Some useful answer'
。 我究竟做錯了什么?
該模擬還必須考慮實例化some_class()
:
MockSomeClass.return_value.my_method.return_value = 'Some useful answer'
internal = some_class()
internal.my_method() # 'Some useful answer
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