Example of unit test of Android presenters (MVP architecture)

WordPresenterTest.java

public class WordPresenterTest {

    @Mock
    WordPresenter.View view;

    @Mock
    WordService wordService;

    private WordPresenter presenter;

    @Before
    public void setUp() {
        MockitoAnnotations.initMocks(this);
        presenter = new WordPresenter(view, wordService);
    }

    @Test
    public void randomWord() {
        when(wordService.randomWordType()).thenReturn(WordType.SUB);
        presenter.randomWord();
        verify(view).setWordType(WordType.SUB.getFullName());
    }

}