Powermock mocking void method throws error

问题:

I am using Powermockito, mockito with TestNG. My test class extends PowerMockTestCase. I want to mock a void method. For that I used following sample syntax,

@PrepareForTest(TestClass.class) class Sample extends PowerMockTestCase{  @BeforeClass public void beforeClass(){ TestClass obj = PowerMockito.spy(TestClass.getInstance()); PowerMockito.doNothing().when(obj).voidMethodName(Matchers.any(Type1.class), Matchers.anyString(), Matchers.any(Type2.class)); } 

When I give this, I get :

FAILED CONFIGURATION: @BeforeClass beforeClass org.mockito.exceptions.misusing.UnfinishedStubbingException:  Unfinished stubbing detected here: -> at org.powermock.api.mockito.internal.PowerMockitoCore.doAnswer(PowerMockitoCore.java:36)  E.g. thenReturn() may be missing. Examples of correct stubbing:     when(mock.isOk()).thenReturn(true);     when(mock.isOk()).thenThrow(exception);     doThrow(exception).when(mock).someVoidMethod(); Hints:  1. missing thenReturn()  2. you are trying to stub a final method, you naughty developer! 

Can you please let me know what I am missing here?

Thanks

回答1:

If the void method is not a final method, you do not need to use PowerMockito! Also, I don't see why you would mock "doNoting()". This would be used if you had a default mocking behavior, throwing an exception when the void method is called, and when for a specific test case you would want to override this behavior. Ib your case, would remove this line completely.

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