def test_add_track_to_profile(self): profile = Profile() self.assertEqual(0, len(profile.tracks)) t1 = profile.new_track({}) self.assertEqual(1, len(profile.tracks)) t2 = Track() profile.add_track(t2) self.assertEqual(2, len(profile.tracks)) profile.remove_track(t2) self.assertEqual(1, len(profile.tracks))