markchristopherng

@Singleton
@Component(modules = [DaggerModule::class])
interface AppComponent {

    fun inject(mainActivity: MainActivity)

    @Component.Factory
    interface Factory {

        fun create(@BindsInstance welcomeMessage: String): AppComponent

markchristopherng

class DaggerApplication : Application() {

    val appComponent: AppComponent by lazy {
        DaggerAppComponent.factory().create("welcome to Dagger")
    }
}

markchristopherng

class MainActivity : AppCompatActivity() {

    @Inject
    lateinit var greetingService: GreetingService

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)
        (application as DaggerApplication).appComponent.inject(this)

markchristopherng

@RunWith(MockitoJUnitRunner::class)
class GreetingServiceTest {

    private lateinit var greetingService: GreetingService

    @Mock
    lateinit var timeService: TimeService

    @Before
    fun setup() {

markchristopherng

@Singleton
class GreetingServiceImpl @Inject constructor(private val messageData: MessageData, private val timeService: TimeService) :
    GreetingService {
        
@Singleton
class TimeServiceImpl @Inject constructor() : TimeService {
        
data class MessageData  @Inject constructor(val welcomeMessage: String)
        

markchristopherng

val toothpickModule = module {
        bind<GreetingService>().toClass<GreetingServiceImpl>().singleton()
        bind<TimeService>().toInstance(TimeServiceImpl())
        bind<MessageData>().toInstance(MessageData())
}

markchristopherng

@InjectConstructor
class GreetingServiceImpl(private val messageData: MessageData, private val timeService: TimeService) :
    GreetingService {

markchristopherng

class ToothpickApplication : Application() {

    override fun onCreate() {
        super.onCreate()
        KTP.openRootScope().installModules(toothpickModule)
    }
}

markchristopherng

class MainActivity : AppCompatActivity() {

    private val greetingService: GreetingService by inject()

    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)
        setContentView(R.layout.activity_main)

        KTP.openRootScope().inject(this)

markchristopherng

@RunWith(MockitoJUnitRunner::class)
class GreetingServiceMockTest {

    @get:Rule
    var toothPickRule = ToothPickRule(this, "scope")

    @Inject
    lateinit var greetingService: GreetingService

    @Mock