def METHOD_NAME(self):
    t = Track()
    t.append(TrackState(0))
    t.append(TrackState(1))
    t.append(TrackState(5))
    t.append(TrackState(9))
    nose.tools.assert_equal(
        [ts.frame_id for ts in t],
        [0, 1, 5, 9]
    )