This Gist is a part of the Article: https://prokash-sarkar.medium.com/unit-testing-with-dagger-2-brewing-a-potion-with-fakes-mocks-and-custom-rules-in-android-7f0ab7b22cb

TestAppComponent.kt

@Singleton
@Component(
    modules = [
        AndroidInjectionModule::class, NetworkModule::class,
        TestAppModule::class, AppModuleBinds::class,
        ViewModelBuilderModule::class, ActivityBuildersModule::class
    ]
)
interface TestAppComponent : AppComponent {
    @Component.Factory
    interface Factory {
        fun create(@BindsInstance applicationContext: Context): TestAppComponent
    }
  
    fun inject(app: TestBaseApplication)
  
    fun inject(test: DefaultDataRepositoryTest) // Required for  field injection from the test class
}