TestExamplesApplication.kt

class TestExamplesApplication : ExamplesApplication() {
override fun initAppComponent(): AppComponent {
        return DaggerAppComponent.builder()
                .appModule(MockApplicationModule(this))
                .build()
    }
@Module
    private inner class MockApplicationModule internal constructor(application: Application) : AppModule(application) {
        override fun provideUserService(context: Context): UserService {
            val mock = Mockito.mock(UserService::class.java)
            `when`(mock!!.displayUserName("Test")).thenReturn("Hello Test!")
            return mock
        }
    }
}