def test_calculate_valid_input_multiple_items(self):
""" Tests the checkout handler calculate function a multiple items in the input.
For the mock input provided it should return 130+45+20=195.
"""
special_offers_item_a = [SpecialOffer(3, 130, None), SpecialOffer(5, 200, None)]
special_offers_item_b = [SpecialOffer(2, 45, None)]
item_a = StockKeepUnit('A', 50, special_offers_item_a)
item_b = StockKeepUnit('B', 30, special_offers_item_b)
item_c = StockKeepUnit('C', 20, [])
item_d = StockKeepUnit('D', 15, [])
special_offers_item_e = [SpecialOffer(2, 0, item_b)]
item_e = StockKeepUnit('E', 40, special_offers_item_e)
mock_supermarket = SuperMarket([item_a, item_b, item_c, item_d, item_e])
mock_input = 'AAABBC'
expected_return_value = 195
returned_value = CheckoutHandler.calculate(mock_input, mock_supermarket)
assert expected_return_value == returned_value
def test_calculate_empty_input(self):
""" Tests the checkout handler calculate function with an empty input
Since it's empty it should return 0.
"""
special_offers_item_a = [SpecialOffer(3, 130, None), SpecialOffer(5, 200, None)]
special_offers_item_b = [SpecialOffer(2, 45, None)]
item_a = StockKeepUnit('A', 50, special_offers_item_a)
item_b = StockKeepUnit('B', 30, special_offers_item_b)
item_c = StockKeepUnit('C', 20, [])
item_d = StockKeepUnit('D', 15, [])
special_offers_item_e = [SpecialOffer(2, 0, item_b)]
item_e = StockKeepUnit('E', 40, special_offers_item_e)
mock_supermarket = SuperMarket([item_a, item_b, item_c, item_d, item_e])
mock_input = ''
expected_return_value = 0
returned_value = CheckoutHandler.calculate(mock_input, mock_supermarket)
assert expected_return_value == returned_value
def test_calculate_total_checkout_value_service_with_same_items_count(self):
""" Tests calculating the checkout value with single quantity items.
For the provided mock values should return:
50+30+20+15+40 = 155
"""
special_offers_item_a = [SpecialOffer(3, 130, None), SpecialOffer(5, 200, None)]
special_offers_item_b = [SpecialOffer(2, 45, None)]
item_a = StockKeepUnit('A', 50, special_offers_item_a)
item_b = StockKeepUnit('B', 30, special_offers_item_b)
item_c = StockKeepUnit('C', 20, [])
item_d = StockKeepUnit('D', 15, [])
special_offers_item_e = [SpecialOffer(2, 0, item_b)]
item_e = StockKeepUnit('E', 40, special_offers_item_e)
mock_supermarket = SuperMarket([item_a, item_b, item_c, item_d, item_e])
input_items_count = {'A': 1, 'B': 1, 'C': 1, 'D': 1, 'E': 1}
expected_value = 155
service = CalculateTotalCheckoutValueService(input_items_count, mock_supermarket)
returned_value = service.call()
assert returned_value, expected_value