def test_prepare_to_json(self):
song = Song(title="Numb", artist="Linkin Park", album="Meteora", length="3:06")
song2 = Song(title="Leave Out All the Rest", artist="Linkin Park", album=" Minutes to Midnight", length="3:24")
song3 = Song(title="Californication", artist="Red Hot Chili Peppers", album="Californication", length="5:21")
song4 = Song(title="It's My Life", artist="Bon Jovi", album="Crush", length="4:27")
code_songs = Playlist(name="Code", repeat=False, shuffle=False)
code2_songs = Playlist(name="Best Songs Ever", repeat=False, shuffle=False)
code_songs.add_song(song)
code_songs.add_song(song2)
code_songs.add_song(song3)
code2_songs.add_songs(song4)
code2_songs.add_songs(code_songs.song_list)
result = code2_songs.prepare_to_json()
self.assertEqual(code2_songs.prepare_to_json(), result)
