def test_quality_setter_happy_path():
v = Video("foo.mkv", "./foo")
v.quality = "1080p"
assert v.quality == "1080p"
v.quality = "720p"
assert v.quality == "720p"
v.quality = "SD"
assert v.quality == "SD"
def test_quality_setter_failure():
v = Video("foo.mkv", "./foo")
with pytest.raises(AttributeError):
v.quality = "not-a-real-quality"
def test_quality_setter_default():
v = Video("foo.mkv", "./foo")
v.quality = None
assert v.quality == "Unknown"