@Test
public void testGetTrackHeaders() {

    List<TrackHeader> trackHeaders = listener.getTrackHeaders();
    assertThat(trackHeaders).hasSize(1);
    TrackHeader header = trackHeaders.get(0);
    assertThat(header.getNumberOfFrets()).isEqualTo(24);
    assertThat(header.getNumberOfString()).isEqualTo(6);
    assertThat(header.getName()).isEqualTo("Track 1");
}