def test_one_without_dependent(self):
"""
One target product in the absence of its dependent product doesn't trigger discount.
"""
product_store = self._create_product_store()
twix_20_discount = DependentDiscountOffer("twix", "pasta", Decimal("0.2"))
basket = Basket(product_store)
twix_basketitem = basket.add("twix")
self.assertEqual(twix_20_discount.calculate_line_total(twix_basketitem, product_store, basket), Decimal("0.80"))
def test_one_without_dependent(self):
'''One target product in the absence of its dependent product doesn't
trigger discount.'''
product_store = self._create_product_store()
mars_snickers_20_discount = DependentDiscountOffer(
'mars bar', 'snickers bar', Decimal('0.2'))
cart = Cart(product_store)
mars_cartitem = cart.add('mars bar')
self.assertEqual(mars_snickers_20_discount.calculate_line_total(
mars_cartitem, product_store, cart), Decimal('0.65'))
def test_two_with_one_dependent(self):
'''Two target product in the presence of one dependent product
triggers discount.'''
product_store = self._create_product_store()
mars_snickers_20_discount = DependentDiscountOffer(
'mars bar', 'snickers bar', Decimal('0.2'))
cart = Cart(product_store)
mars_cartitem = cart.add('mars bar', 2)
cart.add('snickers bar')
self.assertEqual(mars_snickers_20_discount.calculate_line_total(
mars_cartitem, product_store, cart), Decimal('1.17'))
def test_one_without_dependent(self):
'''One target product in the absence of its dependent product doesn't
trigger discount.'''
product_store = self._create_product_store()
mars_snickers_20_discount = DependentDiscountOffer(
'mars bar', 'snickers bar', Decimal('0.2'))
cart = Cart(product_store)
mars_cartitem = cart.add('mars bar')
self.assertEqual(
mars_snickers_20_discount.calculate_line_total(
mars_cartitem, product_store, cart), Decimal('0.65'))
def test_one_without_dependent(self):
'''One target product in the absence of its dependent product doesn't
trigger discount.'''
product_store = self._create_product_store()
mars_snickers_20_discount = DependentDiscountOffer(
'ice cream', 'dairy milk', float('0.2'))
cart = Cart(product_store)
mars_cartitem = cart.add('ice cream')
self.assertEqual(
round(
mars_snickers_20_discount.calculate_line_total(
mars_cartitem, product_store, cart), 2), float('3.49'))
def test_two_with_one_dependent(self):
'''Two target product in the presence of one dependent product
triggers discount.'''
product_store = self._create_product_store()
mars_snickers_20_discount = DependentDiscountOffer(
'mars bar', 'snickers bar', Decimal('0.2'))
cart = Cart(product_store)
mars_cartitem = cart.add('mars bar', 2)
cart.add('snickers bar')
self.assertEqual(
mars_snickers_20_discount.calculate_line_total(
mars_cartitem, product_store, cart), Decimal('1.17'))
def test_two_with_one_dependent(self):
'''Two target product in the presence of one dependent product
triggers discount.'''
product_store = self._create_product_store()
mars_snickers_20_discount = DependentDiscountOffer(
'ice cream', 'dairy milk', float('0.2'))
cart = Cart(product_store)
mars_cartitem = cart.add('ice cream', 2)
cart.add('dairy milk')
self.assertEqual(
round(
mars_snickers_20_discount.calculate_line_total(
mars_cartitem, product_store, cart), 2), float('6.28'))
def test_get_total_with_dependent_discount_offer(self):
"""
Basket get_total returns correct value with dependent discount offer applied.
"""
product_store = self._create_product_store()
twix_pasta_20_discount = DependentDiscountOffer("twix", "pasta", Decimal("0.2"))
basket = Basket(product_store)
basket.add("twix", 2)
basket.add("pasta")
self.assertEqual(basket.get_total(offers=[twix_pasta_20_discount]), Decimal('2.94'))
def test_get_total_with_dependent_discount_offer(self):
'''Cart get_total returns correct value with a dependent discount
offer applied.'''
product_store = self._create_product_store()
kitkat_apple_20_discount = DependentDiscountOffer(
'kitkat', 'apple', float('0.2'))
cart = Cart(product_store)
cart.add('kitkat', 2)
cart.add('apple')
self.assertEqual(
round(cart.get_total(offers=[kitkat_apple_20_discount]), 2),
float('1.41'))
def test_get_total_with_dependent_discount_offer(self):
'''Cart get_total returns correct value with a dependent discount
offer applied.'''
product_store = self._create_product_store()
strawberries_apple_20_discount = DependentDiscountOffer(
'strawberries', 'apple', Decimal('0.2'))
cart = Cart(product_store)
cart.add('strawberries', 2)
cart.add('apple')
self.assertEqual(
cart.get_total(offers=[strawberries_apple_20_discount]),
Decimal('3.75'))
def test_get_total_with_two_offers_on_same_target(self):
'''Cart get_total returns cheapest total when two offers are
applicable for the same target.'''
product_store = self._create_product_store()
bogof_kitkat = MultiBuyOffer('kitkat', 1, 1)
kitkat_apple_20_discount = DependentDiscountOffer(
'kitkat', 'apple', float('0.2'))
cart = Cart(product_store)
cart.add('kitkat', 2)
cart.add('apple')
self.assertEqual(
cart.get_total(offers=[bogof_kitkat, kitkat_apple_20_discount]),
float('0.85'))
def test_get_total_with_two_offers_on_same_target(self):
'''Cart get_total returns cheapest total when two offers are
applicable for the same target.'''
product_store = self._create_product_store()
bogof_strawberries = MultiBuyOffer('strawberries', 1, 1)
strawberries_apple_20_discount = DependentDiscountOffer(
'strawberries', 'apple', Decimal('0.2'))
cart = Cart(product_store)
cart.add('strawberries', 2)
cart.add('apple')
self.assertEqual(
cart.get_total(
offers=[bogof_strawberries, strawberries_apple_20_discount]),
Decimal('2.15'))