def test_update(self): assert len(ChannelStorage.get()) == 0 channel = ChannelStorage() channel.name = 'demo_name' channel.music_list = ['1' * 24] now = datetime.datetime(2013, 12, 24, 10, 8, 3) channel.upload_date = now channel.uuid = 'douban-cid' channel.save() channel.update(music_list=['2' * 24]) channel = ChannelStorage.get()[0] assert channel.music_list == ['2' * 24]