def test_choose_category(self): wynk = MusicPlayer( 10, 9, 4, 'Harshi', 'WYNK08', 'premium', ['Pachai Nirame'], ['descpasito'], ['Tamil', 'Hindi', 'English'], 1, ['Premium', 'Free', 'Subscribed'], ['Anirudh', 'ARR', 'Ankit Tiwari'], { 'Anirudh': ['Yaanji', 'VIP'], 'Dhanush': ['Maruvarthai', 'Vada chennai', 'Visiri'], 'Hindi': ['ADHM', 'Dekthe', 'Barish'] }, ['Nostalgic', 'Love', 'English'], []) song = WynkSongs('mazhai kuruvi', 'MK', 4, 'ARR', 'Tamil', 'STR', 'CCV', '5 mins', 'xx', 10) check = wynk.select_category('karthik') self.assertEqual(check, None)