def test_recalculate_fifth():
recalculate_quality(potato5)
assert potato5.quality == 2
recalculate_quality(cheese5)
def test_recalculate_fourth():
recalculate_quality(potato4)
assert potato4.quality == -0.5
recalculate_quality(cheese4)
def test_recalculate_second():
recalculate_quality(potato2)
assert potato2.quality == 14.5
recalculate_quality(cheese2)
assert cheese2.quality == 18
def test_recalculate_third():
recalculate_quality(potato3)
assert potato3.quality == 3.5
recalculate_quality(cheese3)
def test_recalculate_quality_first():
recalculate_quality(potato1)
assert potato1.quality == 7.5
recalculate_quality(cheese1)
assert cheese1.quality == 4