AudioPlayerViewModel extends ViewModel implements MediaPlayer.OnCompletionListener { public void pause() { getMediaPlayer().pause(); CurrentlyPlaying currentlyPlayingValue = currentlyPlaying.getValue(); if (currentlyPlayingValue != null) { currentlyPlaying.setValue(currentlyPlayingValue.paused()); } } AudioPlayerViewModel(MediaPlayerFactory mediaPlayerFactory, Scheduler scheduler); void play(Clip clip); void playInOrder(List<Clip> clips); void stop(); void pause(); LiveData<Boolean> isPlaying(@NonNull String clipID); LiveData<Integer> getPosition(String clipID); void setPosition(String clipID, Integer newPosition); void background(); @Override void onCompletion(MediaPlayer mediaPlayer); LiveData<Exception> getError(); void dismissError();  }
@Test public void pause_pausesMediaPlayer() { viewModel.pause(); verify(mediaPlayer).pause(); }