问题
What does the annotation @PrepareForTest in PowerMockito really mean?
What should be placed there apart of classes which have static methods?
回答1:
That annotation tells PowerMock(ito) that the listed classes will need to be manipulated on the byte code level.
You need to "prepare for test" all these classes X of which you want to
- mock a static method (on X)
- gain control over calls to new() used in another class X
- gain control over private methods (which you do using a spy and
PowerMockito.when(spy, "privateMethodNameAsString").then...
In other words: to mock X.doStatic(), you have to prepare X. To control new Y, you have to prepare the class X that contains that new() statement.
来源：https://stackoverflow.com/questions/56430071/what-does-preparefortest-in-powermock-really-mean