assertThat(memoryDatabase.getAlbum("album3").get(),
isAlbum("album3", "album1", "album3", "album-description3"));
assertThat(memoryDatabase.getAlbum("album4").isPresent(), is(false));
assertThat(memoryDatabase.getAlbum("album3").get(),
isAlbum("album3", "album1", "album3", "album-description3"));
assertThat(memoryDatabase.getAlbum("album4").isPresent(), is(false));