def test_track_year(self): song = Song(self.mp3_file_path) self.assertIsNone(song.get_track_year()) song = Song(self.mp3_file_path_with_year) self.assertEqual(1972, song.get_track_year()) song = Song(self.flac_file_path) self.assertIsNone(song.get_track_year()) song = Song(self.m4a_file_path) self.assertIsNone(song.get_track_year()) song = Song(self.no_meta_file) self.assertIsNone(song.get_track_year()) song = Song(self.no_meta_file) self.assertEqual(1999, song.get_track_year(1999))