def test_the_order_of_processes_applied_to_a_substance_matters():
substance1 = Substance()
result1 = substance1.cook()
result1 = result1.ferment()
substance2 = Substance()
result2 = substance2.ferment()
result2 = result2.cook()
assert result1.state != result2.state
assert result1.state == result2.state[::-1]
def test_can_ferment_substance():
substance = Substance()
result = substance.ferment()
assert substance.state == ['fermented']