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

@RunWith(MockitoJUnitRunner::class)
class GreetingServiceTest {

    private lateinit var greetingService: GreetingService

    @Mock
    lateinit var timeService: TimeService

    @Before
    fun setup() {

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

class DaggerApplication : Application() {

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

markchristopherng

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

    fun inject(mainActivity: MainActivity)

    @Component.Factory
    interface Factory {

        fun create(@BindsInstance welcomeMessage: String): AppComponent

markchristopherng

@Module
interface DaggerModule {

    @Binds
    fun provideTimeService(impl: TimeServiceImpl): TimeService

    @Binds
    fun provideGreetingSersvice(impl: GreetingServiceImpl): GreetingService
}

markchristopherng

class GreetingServiceTest {

    @Test
    fun testGreetingInTheMorning() {

        val testContainer = Kodein {
            import(kodeinModule)
            bind<TimeService>(overrides = true) with singleton {
                object : TimeService {
                    override fun getHourOfDay(): Int = 9

markchristopherng

class MainActivity : AppCompatActivity(), KodeinAware {

    override val kodein by closestKodein()

    private val greetingService by instance<GreetingService>()

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

markchristopherng

class KodeinApplication : Application(), KodeinAware {

    override val kodein = Kodein.lazy {
        import(kodeinModule)
    }
}

markchristopherng

val kodeinModule = Kodein.Module(name = "appmodule") {
    bind() from singleton { MessageData() }
    bind<TimeService>() with singleton { TimeServiceImpl() }
    bind<GreetingService>() with singleton {
        GreetingServiceImpl(instance(), instance()) }
}