正如我们可能知道的那样，默认情况下，一旦定义了Kotlin类，它就是最终类，除非它被显式声明为open.
This would post a challenge when we want to Mock it using Mockito. We need to explicitly declare it as open. Is there a way we could avoid declaring it as open while able to Mock it for our testing?
Mockito2现在也可以模拟期末课程.
However, this feature is opt-in, so you need to enable it manually.
To do so, you need to define a file /mockito-extensions/org.mockito.plugins.MockMaker containing the line mock-maker-inline
See e.g.
http://hadihariri.com/2016/10/04/Mocking-Kotlin-With-Mockito/ or
https://github.com/mockito/mockito/wiki/What%27s-new-in-Mockito-2#unmockable
for a quick introduction
顺便说一句，目前这doesn't work for android