def test_ring_change_method_next():
mood_ring = Ring()
old_mood = str(mood_ring)
for _ in range(100):
mood_ring.change()
assert old_mood != mood_ring
def test_ring_change_method():
mood_list = _default_mood_map.keys()
mood_ring = Ring()
mood_ring.change()
assert str(mood_ring) in mood_list