TrackCollection tracksMock = EasyMock.createMock(TrackCollection.class);
Set<Track> tracks = new HashSet<Track>();
Track trackMock1 = EasyMock.createMock(Track.class);
Track trackMock2 = EasyMock.createMock(Track.class);
Track trackMock3 = EasyMock.createMock(Track.class);
Genre genreMockA = EasyMock.createMock(Genre.class);
Genre genreMockB = EasyMock.createMock(Genre.class);
tracks.add(trackMock1);
tracks.add(trackMock2);
tracks.add(trackMock3);
EasyMock.expect(playlistMock.getTracks()).andReturn(tracksMock);