小编Ric*_*ene的帖子

好吧，这很奇怪。Mockito，Java，在 Windows 上。

 when(mongoTemplate.findAndModify(any(Query.class), any(Update.class), any(FindAndModifyOptions.class), eq(Task.class)))
            .thenReturn(t1)
            .thenReturn(t2);

现在，如果我在调试模式下运行它，它就可以正常工作。但是，如果我在时间上设置断点，并且单步执行，则会失败。

IntelliJ 中的错误是

org.mockito.exceptions.misusing.WrongTypeOfReturnValue: 
Task cannot be returned by toString()
toString() should return String
***
If you're unsure why you're getting above error read on.
Due to the nature of the syntax above problem might occur because:
1. This exception *might* occur in wrongly written multi-threaded tests.
   Please refer to Mockito FAQ on limitations of concurrency testing. 
2. A spy is stubbed using when(spy.foo()).then() syntax. It is safer to stub spies …