android-espresso - AndroidInjector 和 Espresso

Question

使用 AndroidInjector 和 Subcomponents 无法将作用域对象的事件注入(inject) Espresso 的 Test 类。

以前使用应用程序级组件和事件组件，只要您创建一个继承事件组件的测试组件，您就可以为不是事件的测试类调用注入(inject)()。

例子:

事件组件

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

测试类组件

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

测试模块

@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));
    }
}

在测试类

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

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

人们如何访问自动生成的事件模块并在 espresso UI 测试中使用它们？我想访问上面的“ServiceGateway”和“NowPlayingPresenter”等对象并在测试中使用它们。模拟、 spy 或空闲资源。在上面的示例中，我的空闲资源是我在每次单独测试期间传递给 espresso 的“NowPlayingPresenter”具体实现。

Answer 1

前几天我设法使用自定义测试运行器通过一种有点hacky的方法解决了这个问题。首先是拥有一个TestRunner for faking the Android Application .现在您可以简单地扩展您的主应用程序类并覆盖 onCreate() , 注入(inject) component built especially for testing返回模拟实例而不是真实实例。