Mockito's verify method interferes with doAnswer's checks

Question

When using mocks for unit testing, I often encounter the need to check whether a certain method of the mock is invoked with proper arguments. This means that I have to somehow find a way to peek into what gets passed to the method in question. In Spock this can be done using something like:

1 * serviceMock.operate(*_) >> { args ->
    def argument = args[0]
    assert expectedValue = argument.actualValue
}

With Mockito (and JUnit), the only way I think this can be done is by using doAnswer and verify, something like:

doAnswer(new Answer() {
  //check arguments here
}).when(service).operate(any(Data.class));

Then I have to verify that the operation actually gets called with:

verify(service).operate(any(Data.class));

The code above, however, interferes with doAnswer as if it's an actual call to the method in question. How do I work around this so that I can both verify that the method is called, and verify that the arguments it gets are correct?

[this question](http://stackoverflow.com/questions/12295891/how-to-use-argumentcaptor-for-stubbing) should be useful — troig, Apr 18 '16 at 10:35

score 1 · Accepted Answer · answered Apr 18 '16 at 10:36

1

Mockito verifies argument values in natural java style: by using an equals() method. This is also the recommended way of matching arguments because it makes tests clean & simple.

ArgumentCaptor<Data> argument = ArgumentCaptor.forClass(Data.class);
verify(service).operate(argument.capture());
assertEquals("John", argument.getValue().getDataName());

more refer here

I hope this will be helpful

answered Apr 18 '16 at 10:36

Paraneetharan Saravanaperumal

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It keeps telling me that no value gets captured. Do I specify these lines before the actual call, or after? – Psycho Punch Apr 18 '16 at 11:19
just clarification , In this context , u sent Data object to method operate right ? – Paraneetharan Saravanaperumal Apr 18 '16 at 11:27
You mean in the actual call to the mock? Yes. I have an actual call to `service.operate(actualData);`. – Psycho Punch Apr 18 '16 at 11:36

Mockito's verify method interferes with doAnswer's checks

1 Answers1