public void playbackMovie(String movie) {
    VideoStreamingService videoStreamingService = lookupService.getBusinessService(movie);
    videoStreamingService.doProcessing();
  }
@Test
  void testBusinessDelegate() {

    // setup a client object
    var client = new MobileClient(businessDelegate);

    // action
    client.playbackMovie("Die hard");

    // verifying that the businessDelegate was used by client during playbackMovie() method.
    verify(businessDelegate).playbackMovie(anyString());
    verify(netflixService).doProcessing();

    // action
    client.playbackMovie("Maradona");

    // verifying that the businessDelegate was used by client during doTask() method.
    verify(businessDelegate, times(2)).playbackMovie(anyString());
    verify(youTubeService).doProcessing();
  }