用Mockito测试Mosby

Question

我正在使用Mosby，我想测试我的简单演示者。

public class DetailsPresenter extends MvpBasePresenter<DetailsView> {

public void showCountry(Country country) {
    getView().setTitle(country.getName());
    getView().setFlag(country.getFlagUrl());
}

}

我试图通过嘲弄主持人来解决这个问题：

public class DetailsPresenterTest {

private DetailsPresenter mockPresenter;
private DetailsView mockView;

@Before
public void setUp() throws Exception {
    mockPresenter = mock(DetailsPresenter.class);
    mockView = mock(DetailsView.class);

    when(mockPresenter.isViewAttached()).thenReturn(true);
    when(mockPresenter.getView()).thenReturn(mockView);

    doCallRealMethod().when(mockPresenter).showCountry(any(Country.class));
}

@Test
public void shouldShowFlag() throws Exception {
    mockPresenter.showCountry(any(Country.class));
    verify(mockView, times(1)).setFlag(anyString());
}

@Test
public void shouldShowName() throws Exception {
    mockPresenter.showCountry(any(Country.class));
    verify(mockView, times(1)).setTitle(anyString());
}

}

但我有个错误

    Wanted but not invoked:
detailsView.setFlag(<any string>);
-> at eu.szwiec.countries.details.DetailsPresenterTest.shouldShowFlag(DetailsPresenterTest.java:39)
Actually, there were zero interactions with this mock.

我也试过使用真正的演示者，但没有成功。

Answer 1

您必须使用真正的演示者和真实的国家对象来调用showCountry()。其他一切都没有意义(不是测试真正的演示者，而是模拟演示者实例)。

@Test
public void showFlagAndName(){
   DetailsView mockView = mock(DetailsView.class);
   DetailsPresenter presenter = new DetailsPresenter();
   Country country = new Country("Italy", "italyFlag");

   presenter.attachView(mockView);

   presenter.showCountry(country);

   verify(mockView, times(1)).showCountry("Italy");
   verify(mockView, times(1)).setFlag("italyFlag");
}

Answer 2

你有没有尝试添加一些日志记录来找出发生了什么事？

我认为你并没有找到真正的方法

mockPresenter.showCountry(any(Country.class));

不构造Country对象实例，而只是传递null。所以条件

doCallRealMethod().when(mockPresenter).showCountry(any(Country.class));

没有得到满足。如果你用一个不那么严格的条件

doCallRealMethod().when(mockPresenter).showCountry(any());

你应该得到一个NullPointerException。

您可以通过在方法调用中使用真实的或模拟的Country实例来解决这个问题。