### Question:
TuneService { public List<Tune> getAll() { log.debug("Retrieve all items"); return tunesRepository.getTunes(); }  List<Tune> getByGenre(String genre); List<Tune> getByArtist(String artist); List<Tune> getAll(); void store(Tune tune); void remove(Tune tune);  }### Answer:
@Test public void getAll() { List<Tune> all = tuneService.getAll(); Assertions.assertThat(all).hasSize(1); Mockito.verify(tunesRepository).getTunes(); }