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// CoroutinesQualifiers.kt file

@Retention(AnnotationRetention.RUNTIME)
@Qualifier
annotation class DefaultDispatcher

@Retention(AnnotationRetention.RUNTIME)
@Qualifier
annotation class IoDispatcher

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@InstallIn(SingletonComponent::class)
@Module
object CoroutinesDispatchersModule {

    @DefaultDispatcher
    @Provides
    fun providesDefaultDispatcher(): CoroutineDispatcher = Dispatchers.Default

    @IoDispatcher
    @Provides

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@InstallIn(SingletonComponent::class)
@Module
object CoroutinesScopesModule {

    @Singleton
    @Provides
    fun providesCoroutineScope(
        @DefaultDispatcher defaultDispatcher: CoroutineDispatcher
    ): CoroutineScope = CoroutineScope(SupervisorJob() + defaultDispatcher)
}

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@Retention(AnnotationRetention.RUNTIME)
@Qualifier
annotation class ApplicationScope

@InstallIn(SingletonComponent::class)
@Module
object CoroutinesScopesModule {

    @Singleton
    @ApplicationScope

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@Singleton
class MyRepository @Inject constructor(
    @ApplicationScope private val externalScope: CoroutineScope
) { /* ... */ }

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// androidTest/projectPath/TestCoroutinesDispatchersModule.kt file

@TestInstallIn(
    components = [SingletonComponent::class],
    replaces = [CoroutinesDispatchersModule::class]
)
@Module
object TestCoroutinesDispatchersModule {

    @DefaultDispatcher

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class LocationActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        // Create a new coroutine from the lifecycleScope
        // since repeatOnLifecycle is a suspend function
        lifecycleScope.launch {
            // Suspend the coroutine until the lifecycle is DESTROYED.
            // repeatOnLifecycle launches the block in a new coroutine every time the 
            // lifecycle is in the STARTED state (or above) and cancels it when it's STOPPED.

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/* Copyright 2022 Google LLC.	
   SPDX-License-Identifier: Apache-2.0 */
public fun LifecycleOwner.addRepeatingJob(
    state: Lifecycle.State,
    coroutineContext: CoroutineContext = EmptyCoroutineContext,
    block: suspend CoroutineScope.() -> Unit
): Job = lifecycleScope.launch(coroutineContext) {
    repeatOnLifecycle(state, block)
}

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class LocationActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        lifecycleOwner.addRepeatingJob(Lifecycle.State.STARTED) {
            someLocationProvider.locations.collect {
                // New location! Update the map
            }
        }
    }

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class LocationActivity : AppCompatActivity() {
    override fun onCreate(savedInstanceState: Bundle?) {
        super.onCreate(savedInstanceState)

        val job = lifecycleScope.launch {

            doSomeSuspendInitWork()

            // DANGEROUS! This API doesn't preserve the calling Context!
            // It won't get cancelled when the parent coroutine is cancelled!