On 10/03/17 10:50, Eloka Chima via Tutor wrote:
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> Thank you so much. Your guidance have been helpful, the bugs have been gotten
> rid of after I reviewed the code. But 3 out of 6 of the test is correct, the
> other 3 is incorrect. Take a look at it and tell me where I went wrong.
>>> Below is my new code:
> class ShoppingCart(object): def __init__(self): self.total = 0
> self.items = {} def add_item(self, item_name, quantity, price): for
> item_name in self.items: if not item_name in self.items:
> self.items["item_name"] = quantity self.total += price return
> self.total return self.items def remove_item(self, item_name, quantity,
> price): for item_name in self.items: if item_name in self.items:
> del self.items["item_name"] self.total -= price else: if
> quantity > self.items[quantity]: self.items = 0 return self.items
> def checkout(self, cash_paid): if cash_paid < self.total :
> self.total -= cash_paid return "Cash paid not enough"class
> Shop(ShoppingCart): def __init__(self): self.quantity = 100 def
> remove_item(self): self.quantity -=1 return self.quantity
>>> This is the test for the program:
> import unittest
> class ShoppingCartTestCases(unittest.TestCase): def setUp(self):
> self.cart = ShoppingCart() self.shop = Shop() def
> test_cart_property_initialization(self): self.assertEqual(self.cart.total,
> 0, msg='Initial value of total not correct')
> self.assertIsInstance(self.cart.items, dict, msg='Items is not a dictionary')
> def test_add_item(self): self.cart.add_item('Mango', 3, 10)
> self.assertEqual(self.cart.total, 30, msg='Cart total not correct after
> adding items') self.assertEqual(self.cart.items['Mango'], 3, msg='Quantity
> of items not correct after adding item') def test_remove_item(self):
> self.cart.add_item('Mango', 3, 10) self.cart.remove_item('Mango', 2, 10)
> self.assertEqual(self.cart.total, 10, msg='Cart total not correct after
> removing item') self.assertEqual(self.cart.items['Mango'], 1,
> msg='Quantity of items not correct after removing item') def
> test_checkout_returns_correct_balance(self): self.cart.add_item('Mango', 3
, 10) self.cart.add_item('Orange', 16, 10)
self.assertEqual(self.cart.checkout(265), 75, msg='Balance of checkout not
correct') self.assertEqual(self.cart.checkout(25), 'Cash paid not enough',
msg='Balance of checkout not correct') def
test_shop_is_instance_of_shopping_cart(self):
self.assertTrue(isinstance(self.shop, ShoppingCart), msg='Shop is not a
subclass of ShoppingCart')
> def test_shop_remove_item_method(self): for i in range(15):
> self.shop.remove_item()
> self.assertEqual(self.shop.quantity, 85)
>
>>> I get this test result after running it:
> 1 . test_add_itemFailure in line 20, in test_add_item
> self.assertEqual(self.cart.total, 30, msg='Cart total not correct after
> adding items') AssertionError: Cart total not correct after adding items2 .
> test_checkout_returns_correct_balanceFailure in line 34, in
> test_checkout_returns_correct_balance
> self.assertEqual(self.cart.checkout(265), 75, msg='Balance of checkout not
> correct') AssertionError: Balance of checkout not correct3 .
> test_remove_itemFailure in line 27, in test_remove_item
> self.assertEqual(self.cart.total, 10, msg='Cart total not correct after
> removing item') AssertionError: Cart total not correct after removing item.
--
Alan G
Author of the Learn to Program web site
http://www.alan-g.me.uk/
http://www.amazon.com/author/alan_gauld
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