AndroidInjector and Espresso

Question

Using AndroidInjector and subcomponents makes it impossible to inject the scope tested in the Test class for Espresso.

Previously, with application-level components and activity components, you had the option to call injection () for test classes that were not active until you created a test component that inherited the activity component.

Example:

Activity component

@ActivityScope
@Component(
    dependencies = ApplicationComponent.class,
    modules = {
            NowPlayingActivityModule.class
    })
public interface NowPlayingActivityComponent {
    void inject(NowPlayingActivity activity);
}

Test class component

@ActivityScope
@Component(
    dependencies = TestApplicationComponent.class,
    modules = {
            TestNowPlayingActivityModule.class,
            ActivityModule.class
    })
 public interface TestNowPlayingActivityComponent extends NowPlayingActivityComponent {
    void inject(NowPlayingActivityTest nowPlayingActivityTest);
}

Testing module

@Module
public class TestNowPlayingActivityModule {
    private NowPlayingActivityModule nowPlayingActivityModule;

    public TestNowPlayingActivityModule(NowPlayingActivityModule nowPlayingActivityModule) {
        this.nowPlayingActivityModule = nowPlayingActivityModule;
    }

    @Provides
    @ActivityScope
    public ServiceGateway providesServiceGateway(ServiceApi serviceApi) {
        return nowPlayingActivityModule.providesServiceGateway(serviceApi);
    }

    @Provides
    @ActivityScope
    public NowPlayingPresenter providesNowPlayingPresenter(NowPlayingInteractor nowPlayingInteractor) {
        //In order to make sure espresso idles the view checks, we put the IdlingResource on the presenter.
        return Mockito.spy(new NowPlayingPresenterImpl_IdlingResource(nowPlayingActivityModule.getNowPlayingViewModel(),
            nowPlayingInteractor));
    }
}

In test class

TestNowPlayingActivityComponent mockNowPlayingActivityComponent = DaggerTestNowPlayingActivityComponent.builder()
            .testApplicationComponent((TestApplicationComponent) mvpExampleApplication.getComponent())
            .testNowPlayingActivityModule(new TestNowPlayingActivityModule(nowPlayingActivityModule))
            .build();

mockNowPlayingActivityComponent.inject((NowPlayingActivity) activity);
mockNowPlayingActivityComponent.inject(NowPlayingActivityTest.this);

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Answer 1

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Answer 2

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