How to unit test a method with void return type?

How do you write a unit test for a method with void ret开发者_如何学Pythonurn type?

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Assuming the method does something, you can try to sense that something.

That is, suppose it increments a variable that is exposed elsewhere in a property - you can check the value of the property before and after calling the method.

In essence this is checking that the method is working correctly by checking the expected side-effects from it.