def test_rules_with_only_items_add_item_values_in_the_cart(self):
my_rules = {Item('VOUCHER', 'Gift Card', 5.0),
Item('TSHIRT', 'Summer T-Shirt', 20.0),
Item('PANTS', 'Summer Pants', 7.5)}
sut = Checkout(my_rules)
sut.add_item('VOUCHER')
sut.add_item('TSHIRT')
sut.add_item('PANTS')
expected_total = 32.5
self.assertEqual(expected_total, sut.get_total())
def test_apply_2x1_n_3_item_discounts_in_cart(self):
voucher_desc = Item('VOUCHER', 'Gift Card', 5.0)
tshirt_desc = Item('TSHIRT', 'Summer T-Shirt', 20.0)
pants_desc = Item('PANTS', 'Summer Pants', 7.5)
my_rules = {voucher_desc, tshirt_desc, pants_desc,
TwoForOneItem(voucher_desc),
ReducedPriceIfNOrMoreItems(tshirt_desc, 3, 19.0)}
sut = Checkout(my_rules)
for it in ['VOUCHER', 'TSHIRT', 'VOUCHER', 'VOUCHER', 'PANTS', 'TSHIRT', 'TSHIRT']:
sut.add_item(it)
expected_total = 74.50
self.assertEqual(expected_total, sut.get_total())
def test_two_for_one_discount_is_applied(self):
voucher_desc = Item('VOUCHER', 'Gift Card', 5.0)
tshirt_desc = Item('TSHIRT', 'Summer T-Shirt', 20.0)
pants_desc = Item('PANTS', 'Summer Pants', 7.5)
my_rules = {voucher_desc, tshirt_desc, pants_desc,
TwoForOneItem(voucher_desc),
ReducedPriceIfNOrMoreItems(tshirt_desc, 3, 19.0)}
sut = Checkout(my_rules)
sut.add_item('VOUCHER')
sut.add_item('TSHIRT')
sut.add_item('VOUCHER')
expected_total = 25.0
self.assertEqual(expected_total, sut.get_total())
def test_total_remains_unaltered_when_discounts_do_not_apply(self):
voucher_desc = Item('VOUCHER', 'Gift Card', 5.0)
tshirt_desc = Item('TSHIRT', 'Summer T-Shirt', 20.0)
pants_desc = Item('PANTS', 'Summer Pants', 7.5)
my_rules = {voucher_desc, tshirt_desc, pants_desc,
TwoForOneItem(voucher_desc),
ReducedPriceIfNOrMoreItems(tshirt_desc, 3, 19.0)}
sut = Checkout(my_rules)
sut.add_item('VOUCHER')
sut.add_item('TSHIRT')
sut.add_item('PANTS')
expected_total = 32.5
self.assertEqual(expected_total, sut.get_total())
class CheckoutController:
voucher_desc = Item('VOUCHER', 'Gift Card', 5.0)
tshirt_desc = Item('TSHIRT', 'Summer T-Shirt', 20.0)
pants_desc = Item('PANTS', 'Summer Pants', 7.5)
rules = {voucher_desc, tshirt_desc, pants_desc,
TwoForOneItem(voucher_desc),
ReducedPriceIfNOrMoreItems(tshirt_desc, 3, 19.0)}
def __init__(self):
self.checkout = Checkout(self.rules)
def clear_checkout(self):
self.checkout = Checkout(self.rules)
def add_item(self, item_name):
try:
self.checkout.add_item(item_name)
return True
except ValueError:
return False
def get_total(self):
return self.checkout.get_total()
def test_empty_cart_with_no_rules_is_0(self):
my_rules = set()
sut = Checkout(my_rules)
self.assertEqual(0.0, sut.get_total())
def test_emtpy_cart_with_rules_is_0(self):
my_rules = {Item('VOUCHER', 'Gift Card', 5.0)}
sut = Checkout(my_rules)
self.assertEqual(0.0, sut.get_total())
