Android 单元测试运行所有类测试失败但每个方法都运行成功

Question

请帮助我，当我一起运行所有类测试方法时，测试在一个方法中失败，尽管当我单独运行该方法时它成功

public class RealEstatesListPresenterTest {
RealEstatesListPresenter mRealEstatesListPresenter;
@Mock
private RealEstateListBusiness mRealEstateListBusiness;
@Mock
private RealEstatesListContract.View mRealEstatesView;

@BeforeClass
public static void setUpClass() {
    RxAndroidPlugins.setInitMainThreadSchedulerHandler(__ -> Schedulers.trampoline());
}

@Before
public void setupTasksPresenter() {
    MockitoAnnotations.initMocks(this);
    mRealEstatesListPresenter = new RealEstatesListPresenter(mRealEstatesView);
    mRealEstatesListPresenter.setmRealEstateListBusiness(mRealEstateListBusiness);
}

@Test
public void testWhenGetAllRealEstates_ProgressISDisplayed() {
    when(mRealEstateListBusiness.getAllRealEstates()).thenReturn(Observable.create(sub -> {
        sub.onNext(new ArrayList<>());
        sub.onComplete();
    }));
    mRealEstatesListPresenter.getAllRealEstates();
    verify(mRealEstatesView, times(1)).showLoading();
}

@Test
public void testWhenGetAllRealEstatesSuccess_ProgressISHidden() {
    when(mRealEstateListBusiness.getAllRealEstates()).thenReturn(Observable.create(sub -> {
        sub.onNext(new ArrayList<>());
        sub.onComplete();
    }));
    mRealEstatesListPresenter.getAllRealEstates();
    verify(mRealEstatesView, times(1)).hideLoading();
}

@Test
public void testWhenGetAllRealEstatesError_ProgressISHidden() {
    when(mRealEstateListBusiness.getAllRealEstates()).thenReturn(Observable.create(sub -> {
        sub.onError(new Throwable());
    }));
    mRealEstatesListPresenter.getAllRealEstates();
    verify(mRealEstatesView, times(1)).hideLoading();
}

@AfterClass
public static void tearDownClass() {
    RxAndroidPlugins.reset();
}}

当我一起运行所有测试时，前两个方法通过但最后一个失败(testWhenGetAllRealEstatesError_ProgressISHidden)但是当我单独运行它时它通过。

这是演示者代码

public class RealEstatesListPresenter implements RealEstatesListContract.Presenter {

private RealEstatesListContract.View mView;
private RealEstateListBusiness mRealEstateListBusiness;
private CompositeDisposable mSubscriptions;

@Inject
public RealEstatesListPresenter(RealEstatesListContract.View view) {
    this.mView = view;
    mSubscriptions = new CompositeDisposable();
}

@Inject
public void setmRealEstateListBusiness(RealEstateListBusiness mRealEstateListBusiness) {
    this.mRealEstateListBusiness = mRealEstateListBusiness;
}

@Inject
public void setupListeners() {
    mView.setPresenter(this);
}

@Override
public void unSubscribe() {
    mSubscriptions.clear();
}

@Override
public void getAllRealEstates() {
    mView.showLoading();
    mSubscriptions.add(mRealEstateListBusiness.getAllRealEstates().observeOn(AndroidSchedulers.
            mainThread()).subscribeOn(Schedulers.io()).subscribe((realEstatesItems) -> {
        mView.hideLoading();
        mView.showAllRealEstates(realEstatesItems);
    }, throwable -> {
        mView.hideLoading();
        mView.showErrorMessage(throwable.getMessage());
    }));
}

Answer 1

我在 RX Scheulers 中发现了问题 发生此错误是因为 AndroidSchedulers.mainThread() 返回的默认调度程序是 LooperScheduler 的一个实例，并且依赖于 JUnit 测试中不可用的 Android 依赖项。

我们可以通过在运行测试之前使用不同的调度程序初始化 RxAndroidPlugins 来避免这个问题。您可以在 @BeforeClass 内部执行此操作，因此 final类将像这样

public class RealEstatesListPresenterTest {
private RealEstatesListPresenter mRealEstatesListPresenter;
@Mock
private RealEstateListBusiness mRealEstateListBusiness;
@Mock
private RealEstatesListContract.View mRealEstatesView;

@BeforeClass
public static void setUpClass() {
    Scheduler immediate = new Scheduler() {
        @Override
        public Worker createWorker() {
            return new ExecutorScheduler.ExecutorWorker(Runnable::run);
        }
    };

    RxJavaPlugins.setInitIoSchedulerHandler(scheduler -> immediate);
    RxJavaPlugins.setInitComputationSchedulerHandler(scheduler -> immediate);
    RxJavaPlugins.setInitNewThreadSchedulerHandler(scheduler -> immediate);
    RxJavaPlugins.setInitSingleSchedulerHandler(scheduler -> immediate);
    RxAndroidPlugins.setInitMainThreadSchedulerHandler(scheduler -> immediate);    }

@Before
public void setupTasksPresenter() {
    MockitoAnnotations.initMocks(this);
    mRealEstatesListPresenter = new RealEstatesListPresenter(mRealEstatesView);
    mRealEstatesListPresenter.setmRealEstateListBusiness(mRealEstateListBusiness);
}

@Test
public void testWhenGetAllRealEstates_ProgressISDisplayed() {
    when(mRealEstateListBusiness.getAllRealEstates()).thenReturn(Observable.create(sub -> {
        sub.onNext(new ArrayList<>());
        sub.onComplete();
    }));
    mRealEstatesListPresenter.getAllRealEstates();
    verify(mRealEstatesView, times(1)).showLoading();
}

@Test
public void testWhenGetAllRealEstatesSuccess_ProgressISHidden() {
    when(mRealEstateListBusiness.getAllRealEstates()).thenReturn(Observable.create(sub -> {
        sub.onNext(new ArrayList<>());
        sub.onComplete();
    }));
    mRealEstatesListPresenter.getAllRealEstates();
    verify(mRealEstatesView, times(1)).hideLoading();
}

@Test
public void testWhenGetAllRealEstatesError_ProgressISHidden() {
    when(mRealEstateListBusiness.getAllRealEstates()).thenReturn(Observable.create(sub -> {
        sub.onError(new Throwable());
    }));
    mRealEstatesListPresenter.getAllRealEstates();
    verify(mRealEstatesView, times(1)).hideLoading();
}

@Test
public void testWhenGetAllRealEstatesError_ErrorMessageDisplayed() {
    when(mRealEstateListBusiness.getAllRealEstates()).thenReturn(Observable.create(sub -> {
        sub.onError(new Throwable(""));
    }));
    mRealEstatesListPresenter.getAllRealEstates();
    verify(mRealEstatesView, times(1)).showErrorMessage("");
}

@After
public void teardown() {
    Mockito.reset(mRealEstateListBusiness);
    Mockito.reset(mRealEstatesView);
    Mockito.validateMockitoUsage();
}

@AfterClass
public static void tearDownClass() {
    RxJavaPlugins.reset();
    RxAndroidPlugins.reset();    }}