java - 在Mockito中进行单元测试，在对象上调用函数链？

我在Mockito中没有做太多的测试，也很少做。当我对某个对象调用delete时，得到一个DeleteResponse。这有一个称为getProcessingErrors()的方法，它是一个集合。然后，我可以呼叫.isEmpty()以查看是否有错误。我正在尝试嘲笑。

DeleteResponse deleteResponse = mock(DeleteResponse.class);

when(catalogFramework.delete(any(DeleteRequest.class))).thenReturn(deleteResponse);

when(deleteResponse.getProcessingErrors()).thenReturn(new HashSet<ProcessingDetails>());

PowerMockito.when(deleteResponse.getProcessingErrors().isEmpty()).thenReturn(true);

错误：

org.mockito.exceptions.misusing.WrongTypeOfReturnValue:
Boolean cannot be returned by getProcessingErrors()
getProcessingErrors() should return Set
***
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.

现在，从我阅读本文的方式来看，它说isEmpty无法返回布尔值，但是我相信它已经过时了，只是查看getProcessingErrors。我怎样才能解决这个问题？

最佳答案

在模拟deleteResponse.getProcessingErrors()功能之前需要模拟isEmpty()对象

when(deleteResponse.getProcessingErrors()).thenReturn(mockObject);
PowerMockito.when(mockObject.isEmpty()).thenReturn(true);