Java – How to capture a list of specific type with mockito

javajunitmockitounit testing

Is there a way to capture a list of specific type using mockitos ArgumentCaptore. This doesn't work:

ArgumentCaptor<ArrayList<SomeType>> argument = ArgumentCaptor.forClass(ArrayList.class);

Best Answer

The nested generics-problem can be avoided with the @Captor annotation:

public class Test{

    @Mock
    private Service service;

    @Captor
    private ArgumentCaptor<ArrayList<SomeType>> captor;

    @Before
    public void init(){
        MockitoAnnotations.initMocks(this);
    }

    @Test 
    public void shouldDoStuffWithListValues() {
        //...
        verify(service).doStuff(captor.capture()));
    }
}
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