我创建了一个异步任务的单元测试。它从API获得JSON,我想观察我得到的ArrayList。
这是我的代码:
public class MovieViewModelTest {
@Rule
public InstantTaskExecutorRule instantTaskExecutorRule = new InstantTaskExecutorRule();
private MovieViewModel viewModel;
private MovieRepository movieRepository = mock(MovieRepository.class);
private Observer<ArrayList<Movie>> observer;
@Before
public void setUp(){
viewModel = new MovieViewModel(movieRepository);
observer = mock(Observer.class);
}
@Test
public void getMovie() {
ArrayList<Movie> dummyMovie = viewModel.getArrayMovie();
MutableLiveData<ArrayList<Movie>> movies = new MutableLiveData<>();
movies.setValue(dummyMovie);
when(movieRepository.getListMovie()).thenReturn(dummyMovie);
observer = movies1 -> assertNotNull(movies1);
viewModel.getMovie().observeForever(observer);
verify(observer).onChanged(dummyMovie);
}
但当我尝试运行它时,它显示了一个错误:
org.mockito.exceptions.misusing.NotAMockException:
Argument passed to verify() is of type MovieViewModelTest$$Lambda$1/1976870338 and is not a mock!
我的代码出了什么问题?
异常说明了一切:在其上调用verify
(您的observer
(的对象不是mock。只能对这些调用Verify。您应该将observer实现更改为mock。
尽管您定义了一个全局observer
变量,并在setUp()
函数中将其初始化为mock,但您在getMovie()
上用不再是mock的movies1 -> assertNotNull(movies1);
覆盖它。