import pytz from decimal import Decimal from registrasion import models as rego from registrasion.controllers import discount from cart_controller_helper import TestingCartController from registrasion.controllers.invoice import InvoiceController from test_cart import RegistrationCartTestCase UTC = pytz.timezone('UTC') class DiscountTestCase(RegistrationCartTestCase): @classmethod def add_discount_prod_1_includes_prod_2( cls, amount=Decimal(100), quantity=2, ): discount = rego.IncludedProductDiscount.objects.create( description="PROD_1 includes PROD_2 " + str(amount) + "%", ) discount.save() discount.enabling_products.add(cls.PROD_1) discount.save() rego.DiscountForProduct.objects.create( discount=discount, product=cls.PROD_2, percentage=amount, quantity=quantity, ).save() return discount @classmethod def add_discount_prod_1_includes_cat_2( cls, amount=Decimal(100), quantity=2, ): discount = rego.IncludedProductDiscount.objects.create( description="PROD_1 includes CAT_2 " + str(amount) + "%", ) discount.save() discount.enabling_products.add(cls.PROD_1) discount.save() rego.DiscountForCategory.objects.create( discount=discount, category=cls.CAT_2, percentage=amount, quantity=quantity, ).save() return discount @classmethod def add_discount_prod_1_includes_prod_3_and_prod_4( cls, amount=Decimal(100), quantity=2, ): discount = rego.IncludedProductDiscount.objects.create( description="PROD_1 includes PROD_3 and PROD_4 " + str(amount) + "%", ) discount.save() discount.enabling_products.add(cls.PROD_1) discount.save() rego.DiscountForProduct.objects.create( discount=discount, product=cls.PROD_3, percentage=amount, quantity=quantity, ).save() rego.DiscountForProduct.objects.create( discount=discount, product=cls.PROD_4, percentage=amount, quantity=quantity, ).save() return discount def test_discount_is_applied(self): self.add_discount_prod_1_includes_prod_2() cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_1, 1) cart.add_to_cart(self.PROD_2, 1) # Discounts should be applied at this point... self.assertEqual(1, len(cart.cart.discountitem_set.all())) def test_discount_is_applied_for_category(self): self.add_discount_prod_1_includes_cat_2() cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_1, 1) cart.add_to_cart(self.PROD_3, 1) # Discounts should be applied at this point... self.assertEqual(1, len(cart.cart.discountitem_set.all())) def test_discount_does_not_apply_if_not_met(self): self.add_discount_prod_1_includes_prod_2() cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_2, 1) # No discount should be applied as the condition is not met self.assertEqual(0, len(cart.cart.discountitem_set.all())) def test_discount_applied_out_of_order(self): self.add_discount_prod_1_includes_prod_2() cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_2, 1) cart.add_to_cart(self.PROD_1, 1) # No discount should be applied as the condition is not met self.assertEqual(1, len(cart.cart.discountitem_set.all())) def test_discounts_collapse(self): self.add_discount_prod_1_includes_prod_2() cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_1, 1) cart.add_to_cart(self.PROD_2, 1) cart.add_to_cart(self.PROD_2, 1) # Discounts should be applied and collapsed at this point... self.assertEqual(1, len(cart.cart.discountitem_set.all())) def test_discounts_respect_quantity(self): self.add_discount_prod_1_includes_prod_2() cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_1, 1) cart.add_to_cart(self.PROD_2, 3) # There should be three items in the cart, but only two should # attract a discount. discount_items = list(cart.cart.discountitem_set.all()) self.assertEqual(2, discount_items[0].quantity) def test_multiple_discounts_apply_in_order(self): discount_full = self.add_discount_prod_1_includes_prod_2() discount_half = self.add_discount_prod_1_includes_prod_2(Decimal(50)) cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_1, 1) cart.add_to_cart(self.PROD_2, 3) # There should be two discounts discount_items = list(cart.cart.discountitem_set.all()) discount_items.sort(key=lambda item: item.quantity) self.assertEqual(2, len(discount_items)) # The half discount should be applied only once self.assertEqual(1, discount_items[0].quantity) self.assertEqual(discount_half.pk, discount_items[0].discount.pk) # The full discount should be applied twice self.assertEqual(2, discount_items[1].quantity) self.assertEqual(discount_full.pk, discount_items[1].discount.pk) def test_discount_applies_across_carts(self): self.add_discount_prod_1_includes_prod_2() # Enable the discount during the first cart. cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_1, 1) cart.cart.active = False cart.cart.save() # Use the discount in the second cart cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_2, 1) # The discount should be applied. self.assertEqual(1, len(cart.cart.discountitem_set.all())) cart.cart.active = False cart.cart.save() # The discount should respect the total quantity across all # of the user's carts. cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_2, 2) # Having one item in the second cart leaves one more item where # the discount is applicable. The discount should apply, but only for # quantity=1 discount_items = list(cart.cart.discountitem_set.all()) self.assertEqual(1, discount_items[0].quantity) def test_discount_applies_only_once_enabled(self): # Enable the discount during the first cart. cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_1, 1) # This would exhaust discount if present cart.add_to_cart(self.PROD_2, 2) cart.cart.active = False cart.cart.save() self.add_discount_prod_1_includes_prod_2() cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_2, 2) discount_items = list(cart.cart.discountitem_set.all()) self.assertEqual(2, discount_items[0].quantity) def test_category_discount_applies_once_per_category(self): self.add_discount_prod_1_includes_cat_2(quantity=1) cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_1, 1) # Add two items from category 2 cart.add_to_cart(self.PROD_3, 1) cart.add_to_cart(self.PROD_4, 1) discount_items = list(cart.cart.discountitem_set.all()) # There is one discount, and it should apply to one item. self.assertEqual(1, len(discount_items)) self.assertEqual(1, discount_items[0].quantity) def test_category_discount_applies_to_highest_value(self): self.add_discount_prod_1_includes_cat_2(quantity=1) cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_1, 1) # Add two items from category 2, add the less expensive one first cart.add_to_cart(self.PROD_4, 1) cart.add_to_cart(self.PROD_3, 1) discount_items = list(cart.cart.discountitem_set.all()) # There is one discount, and it should apply to the more expensive. self.assertEqual(1, len(discount_items)) self.assertEqual(self.PROD_3, discount_items[0].product) def test_discount_quantity_is_per_user(self): self.add_discount_prod_1_includes_cat_2(quantity=1) # Both users should be able to apply the same discount # in the same way for user in (self.USER_1, self.USER_2): cart = TestingCartController.for_user(user) cart.add_to_cart(self.PROD_1, 1) # Enable the discount cart.add_to_cart(self.PROD_3, 1) discount_items = list(cart.cart.discountitem_set.all()) # The discount is applied. self.assertEqual(1, len(discount_items)) # Tests for the discount.available_discounts enumerator def test_enumerate_no_discounts_for_no_input(self): discounts = discount.available_discounts(self.USER_1, [], []) self.assertEqual(0, len(discounts)) def test_enumerate_no_discounts_if_condition_not_met(self): self.add_discount_prod_1_includes_cat_2(quantity=1) discounts = discount.available_discounts( self.USER_1, [], [self.PROD_3], ) self.assertEqual(0, len(discounts)) discounts = discount.available_discounts(self.USER_1, [self.CAT_2], []) self.assertEqual(0, len(discounts)) def test_category_discount_appears_once_if_met_twice(self): self.add_discount_prod_1_includes_cat_2(quantity=1) cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_1, 1) # Enable the discount discounts = discount.available_discounts( self.USER_1, [self.CAT_2], [self.PROD_3], ) self.assertEqual(1, len(discounts)) def test_category_discount_appears_with_category(self): self.add_discount_prod_1_includes_cat_2(quantity=1) cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_1, 1) # Enable the discount discounts = discount.available_discounts(self.USER_1, [self.CAT_2], []) self.assertEqual(1, len(discounts)) def test_category_discount_appears_with_product(self): self.add_discount_prod_1_includes_cat_2(quantity=1) cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_1, 1) # Enable the discount discounts = discount.available_discounts( self.USER_1, [], [self.PROD_3], ) self.assertEqual(1, len(discounts)) def test_category_discount_appears_once_with_two_valid_product(self): self.add_discount_prod_1_includes_cat_2(quantity=1) cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_1, 1) # Enable the discount discounts = discount.available_discounts( self.USER_1, [], [self.PROD_3, self.PROD_4] ) self.assertEqual(1, len(discounts)) def test_product_discount_appears_with_product(self): self.add_discount_prod_1_includes_prod_2(quantity=1) cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_1, 1) # Enable the discount discounts = discount.available_discounts( self.USER_1, [], [self.PROD_2], ) self.assertEqual(1, len(discounts)) def test_product_discount_does_not_appear_with_category(self): self.add_discount_prod_1_includes_prod_2(quantity=1) cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_1, 1) # Enable the discount discounts = discount.available_discounts(self.USER_1, [self.CAT_1], []) self.assertEqual(0, len(discounts)) def test_discount_quantity_is_correct_before_first_purchase(self): self.add_discount_prod_1_includes_cat_2(quantity=2) cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_1, 1) # Enable the discount cart.add_to_cart(self.PROD_3, 1) # Exhaust the quantity discounts = discount.available_discounts(self.USER_1, [self.CAT_2], []) self.assertEqual(2, discounts[0].quantity) inv = InvoiceController.for_cart(cart.cart) inv.pay("Dummy reference", inv.invoice.value) self.assertTrue(inv.invoice.paid) def test_discount_quantity_is_correct_after_first_purchase(self): self.test_discount_quantity_is_correct_before_first_purchase() cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_3, 1) # Exhaust the quantity discounts = discount.available_discounts(self.USER_1, [self.CAT_2], []) self.assertEqual(1, discounts[0].quantity) inv = InvoiceController.for_cart(cart.cart) inv.pay("Dummy reference", inv.invoice.value) self.assertTrue(inv.invoice.paid) def test_discount_is_gone_after_quantity_exhausted(self): self.test_discount_quantity_is_correct_after_first_purchase() discounts = discount.available_discounts(self.USER_1, [self.CAT_2], []) self.assertEqual(0, len(discounts)) def test_product_discount_enabled_twice_appears_twice(self): self.add_discount_prod_1_includes_prod_3_and_prod_4(quantity=2) cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_1, 1) # Enable the discount discounts = discount.available_discounts( self.USER_1, [], [self.PROD_3, self.PROD_4], ) self.assertEqual(2, len(discounts)) def test_discounts_are_released_by_refunds(self): self.add_discount_prod_1_includes_prod_2(quantity=2) cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_1, 1) # Enable the discount discounts = discount.available_discounts( self.USER_1, [], [self.PROD_2], ) self.assertEqual(1, len(discounts)) cart.cart.active = False # Keep discount enabled cart.cart.save() cart = TestingCartController.for_user(self.USER_1) cart.add_to_cart(self.PROD_2, 2) # The discount will be exhausted cart.cart.active = False cart.cart.save() discounts = discount.available_discounts( self.USER_1, [], [self.PROD_2], ) self.assertEqual(0, len(discounts)) cart.cart.released = True cart.cart.save() discounts = discount.available_discounts( self.USER_1, [], [self.PROD_2], ) self.assertEqual(1, len(discounts))