def test_three_strawberries_one_fruit_tea(self):
     co = Checkout(PricingRules().list())
     co.scan("SR1")
     co.scan("SR1")
     co.scan("FR1")
     co.scan("SR1")
     assert co.calculate() == 16.61
 def test_two_fruit_teas(self):
     co = Checkout(PricingRules().list())
     co.scan("FR1")
     co.scan("FR1")
     assert co.calculate() == 3.11