public void testAdvance() {

    mp3.loadSongs(list);

    mp3.play();

    assertTrue(mp3.isPlaying());

    mp3.prev();
    assertEquals(mp3.currentSong(), list.get(0));
    assertTrue(mp3.isPlaying());

    mp3.next();
    assertEquals(mp3.currentSong(), list.get(1));
    mp3.next();
    assertEquals(mp3.currentSong(), list.get(2));
    mp3.prev();

    assertEquals(mp3.currentSong(), list.get(1));
    mp3.next();
    assertEquals(mp3.currentSong(), list.get(2));
    mp3.next();
    assertEquals(mp3.currentSong(), list.get(3));
    mp3.next();
    assertEquals(mp3.currentSong(), list.get(3));
    assertTrue(mp3.isPlaying());
  }
  public void testPlay() {

    mp3.loadSongs(list);
    assertFalse(mp3.isPlaying());
    mp3.play();
    assertTrue(mp3.isPlaying());
    assertTrue(mp3.currentPosition() != 0.0);
    mp3.pause();
    assertTrue(mp3.currentPosition() != 0.0);
    mp3.stop();
    assertEquals(mp3.currentPosition(), 0.0, 0.1);
  }
  public void testPlayNoList() {

    // Don't set the list up
    assertFalse(mp3.isPlaying());
    mp3.play();
    assertFalse(mp3.isPlaying());
    assertEquals(mp3.currentPosition(), 0.0, 0.1);
    mp3.pause();
    assertEquals(mp3.currentPosition(), 0.0, 0.1);
    assertFalse(mp3.isPlaying());
    mp3.stop();
    assertEquals(mp3.currentPosition(), 0.0, 0.1);
    assertFalse(mp3.isPlaying());
  }