JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->

// With Dagger2 or dagger.android
class CustomTestRunner : AndroidJUnitRunner() {

    override fun newApplication(cl: ClassLoader?, name: String?, context: Context?): Application {
        return super.newApplication(cl, MainTestApplication::class.java.name, context)
    }
}

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->

// With Dagger2 or dagger.android
@Binds
@IntoMap
@ViewModelKey(SessionDetailViewModel::class)
abstract fun bindSessionDetailFragmentViewModel(viewModel: SessionDetailViewModel): ViewModel

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->

// With Dagger2 or dagger.android
@Target(
    AnnotationTarget.FUNCTION, AnnotationTarget.PROPERTY_GETTER,
    AnnotationTarget.PROPERTY_SETTER
)
@Retention(AnnotationRetention.RUNTIME)
@MapKey

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->


// With Dagger2 or dagger.android
class SessionDetailFragment : ... {
    @Inject lateinit var viewModelFactory: ViewModelProvider.Factory
    private lateinit var sessionDetailViewModel: SessionDetailViewModel
    …
    override fun onCreateView(...) {

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->

    // With dagger.android
    @FragmentScoped
    @ContributesAndroidInjector
    internal abstract fun contributeOnboardingFragment(): OnboardingFragment

    @FragmentScoped
    @ContributesAndroidInjector

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->

// With dagger.android
@ActivityScoped
@ContributesAndroidInjector(
    modules = [
        OnboardingModule::class,
        SignInDialogModule::class
    ]

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->

fun flowFrom(api: CallbackBasedApi): Flow<T> = callbackFlow {
    val callback = object : Callback {
        override fun onNextValue(value: T) {
            offer(value)
        }
        override fun onApiError(cause: Throwable) {
            close(cause)

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->

override fun fetchWeatherFlow(): Flow<String> = flow {
    var counter = 0
    while(true) {
        counter++
        delay(2000)
        emit(weatherConditions[counter % weatherConditions.size])
    }

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->

suspend fun doOneShot(param: String) : Result<String> =
    suspendCancellableCoroutine { continuation ->
        api.addOnCompleteListener { result ->
            continuation.resume(result)
        }.addOnFailureListener { error ->
            continuation.resumeWithException(error)
        }.fetchSomething(param)

JoseAlcerreca

<!-- Copyright 2020 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 -->

suspend fun doOneShot(param: String) : String =
    retrofitClient.doSomething(param)