MovieListViewModel_test.kt

class MovieListViewModel @Inject constructor(private val dataProvider: DataProvider) : ViewModel() {

  val movieDiscover = MutableLiveData<ResourceState>()

  fun fetchMovieDiscover() {
    movieDiscover.postValue(LoadingState())
    dataProvider.getMovieDiscover().subscribeBy(
      onSuccess = { result ->
        if (result.isEmpty()) movieDiscover.postValue(EmptyState())
        else movieDiscover.postValue(PopulatedState(result))
      },
      onError = { error -> movieDiscover.postValue(ErrorState(error.message)) }
    )
  }
}