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kotlinlang

Hi,

Is there a difference between `mockk&lt;T&gt;(relaxed = true)` vs. `spyk`?

I tend to think of them as the same and use the former is useful for when there is a default constructor and the the latter if I need to pass properties to a constructor, and otherwise think they end up the same…. but maybe I am wrong?

yes there is a slight difference: when you invoke a method on a spy, if it has not been stubbed, the actual method on the object will be invoked. if you do the same thing on a relaxed mock, the actual method will not be invoked and it will return a default answer, e.g. an empty list if the method returns a List

usually you use mocks to configure a behavior, spies to observe

ah, that is a very subtle and interesting difference thanks <@U01FPJNK85R>

<@U0QAY96MA>’s point is definitely valid though