How to use two different argument captors in one test method?

Question

I have a problem using captors to test two separate calls of the same method, but with different argument type.

I provided a code sample of what I'm trying to do here - basically I want to verify if certain method was called twice but with different type arguments using two separate captors, and then call some assertions on captured objects.

public class Foo { } public class Bar { } public interface MyClient { void doSomething(Object obj); } public class MyService { private MyClient client; void doSomething() { client.doSomething(new Foo()); client.doSomething(new Bar()); } } @RunWith(MockitoJUnitRunner.class) public class MyServiceTest { @InjectMocks private MyService testObj; @Mock private MyClient myClient; @Captor private ArgumentCaptor<Foo> fooCaptor; @Captor private ArgumentCaptor<Bar> barCaptor; @Test public void testSomething() { testObj.doSomething(); verify(myClient).doSomething(fooCaptor.capture()); // ...do something with fooCaptor verify(myClient).doSomething(barCaptor.capture()); // ...do something with barCaptor } }

I'd expect this test would pass as is, because captors specify argument types, so shouldn't this work same as ArgumentMatchers.any(Foo.class) etc?

Currently I'm getting TooManyActualInvocations - 2 instead of 1.

How do we handle such cases? I don't like the idea of using one captor and then cast the results.

Janos Breuer · Accepted Answer · 2019-01-27 18:52:56Z

1

Try to combine the captors with the isA matcher using the and operator from the AdditionalMatchers package.

import static org.mockito.AdditionalMatchers.and; // ... verify(myClient).doSomething(and(isA(Foo.class), fooCaptor)); verify(myClient).doSomething(and(isA(Bar.class), barCaptor));

answered Jan 27, 2019 at 18:52

Janos Breuer

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1 Comment

jahmaican Over a year ago

Captor is not a matcher, I guess you meant verify(myClient).doSomething(and(isA(Foo.class), fooCaptor.capture())) etc, but still Mockito is unable to handle this situation when you try to call getValue:

org.mockito.exceptions.base.MockitoException: No argument value was captured! You might have forgotten to use argument.capture() in verify()...

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