从Scala Test调用Java时，Mockito没有返回正确的类型

Question

我有以下代码......

   val list : List[MyClass] = List(new MyClass)
    // Doesn't work
    doReturn(list).when(localLib).getThing(anyString(), anyString(), anyInt())
    // Doesn't work
    doReturn(list.asInstanceOf[List[MyClass]]).when(localLib).getExposedDataByDataFileId(anyString(), anyString(), anyInt())

当我进行测试时，我看到......

org.mockito.exceptions.misusing.WrongTypeOfReturnValue: 
$colon$colon cannot be returned by getThing()
getThing() should return List
***
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 - 
   - with doReturn|Throw() family of methods. More in javadocs for Mockito.spy() method.

请注意$colon$colon这是scala限制

MyClass是一个Java类，但测试是在Scala中