我有下面的Dagger组件设置，它很适合我的应用程序。

@Singleton
@Component(
    modules = [
        ApiModule::class,
        DatabaseModule::class,
        ViewModelModule::class,
        ActivityModule::class,
        AndroidSupportInjectionModule::class
    ]
)
interface AppComponent : AndroidInjector<App> {
    @Component.Builder
    interface Builder {
        @BindsInstance
        fun application(app: Application): Builder

        fun build(): AppComponent
    }
}

我希望为ApiModule（Retrofit mock）和DatabaseModule（InMemory Room DB）提供一个自定义实现，以便进行仪器测试。因此，我创建了一个测试组件，如下所示：

@Singleton
@Component(
    modules = [
        MockApiModule::class,
        TestDatabaseModule::class,
        ViewModelModule::class,
        ActivityModule::class,
        AndroidSupportInjectionModule::class
    ]
)
interface TestComponent : AndroidInjector<App> {
    @Component.Builder
    interface Builder {
        fun build(): TestComponent
    }
}

我的片段需要注入ViewModelProvider.Factory

class MovieListingFragment : BaseFragment() {
    @Inject lateinit var factory: ViewModelProvider.Factory
    private val vm: MovieViewModel by navGraphViewModels(R.id.mobile_navigation) { factory }

我使用ViewModelModule生成的代码如下所示：

@Module
interface ViewModelModule {
    @Binds
    @IntoMap
    @ViewModelKey(MovieViewModel::class)
    fun bindMovieViewModel(vm: MovieViewModel): ViewModel

    @Binds
    fun bindViewModelFactory(factory: ViewModelFactory): ViewModelProvider.Factory
}

如何在测试片段中注入此内容？

@RunWith(AndroidJUnit4::class)
class MovieListFragmentTest {
    @Test
    fun testMovieListFragment() {
        val scenario = launchFragmentInContainer<MovieListingFragment>()
        scenario.moveToState(Lifecycle.State.RESUMED)
    }
}