非绑定方法f()必须以x实例作为第一个参数被调用(得到str实例代替)

Here is my class:

这是我的类:

class GoogleCloudLayer:

    def deleteMachine(self, machineName):
        return machineName + ' is dead. (stubbed)'

It works:

工作原理:

>>> gc = GoogleCloudLayer()
>>> gc.deleteMachine('test')
test is dead (stubbed)

But I want to use in test and I want to have the assert_called_with method defined on it:

但是我想在测试中使用，我想要有assert_called_withmethod定义的方法:

from mock import MagicMock
#Stubbing with itself just so it will have the `assert_called_with` method defined on it
GoogleCloudLayer.deleteMachine = MagicMock(side_effect = GoogleCloudLayer.deleteMachine)

But then I get

但后来我得到

>>> gc = GoogleCloudLayer()
>>> gc.deleteMachine('test')
unbound method deleteMachine() must be called with GoogleCloudLayer instance as first argument (got str instance instead)

If I change production code to gc.deleteMachine(gc, 'test') it works. But we don't want that , do we?

如果我将生产代码更改为gc. deletemachine (gc， 'test')，它就可以工作了。但我们不想这样，不是吗?

1 个解决方案

#1

lambda can be useful in this situation, try:

lambda在这种情况下是有用的，试试:

GoogleCloudLayer.createMachine = MagicMock(side_effect = lambda *args, **kwargs: GoogleCloudLayer.createMachine)