assertThat(memoryDatabase.getAlbum(newAlbum.getId()), is(Optional.<Album>absent()));
memoryDatabase.storeAlbum(newAlbum);
assertThat(memoryDatabase.getAlbum(newAlbum.getId()), is(of(newAlbum)));
assertThat(memoryDatabase.getAlbum(newAlbum.getId()), is(Optional.<Album>absent()));
memoryDatabase.storeAlbum(newAlbum);
assertThat(memoryDatabase.getAlbum(newAlbum.getId()), is(of(newAlbum)));