instrumentation tests - Test equivalent of app module

TestAPIModule.kt

@Module
@InstallIn(ApplicationComponent::class)
class TestAPIModule {

    @Provides
    fun giveRetrofitAPIService(): API =
        Retrofit.Builder()
            .baseUrl("http://localhost:8080/")
//            .baseUrl("http://127.0.0.1:8080") //  this too works
            .addConverterFactory(MoshiConverterFactory.create())
            .addCallAdapterFactory(RxJava2CallAdapterFactory.create())
            .build()
            .create(API::class.java)

    @Provides
    fun giveTestScheduler(): TestScheduler? = null
}