def test_itShouldFailBySayingCannotRemoveFromCart_whenWeTryToRemoveNonExistantItem(
self):
cart = Cart()
cart.add_item('iPhone')
with self.assertRaises(CannotRemoveFromCart):
cart.remove_item('Air Buds')
def test_theNumberOfItemsShouldBeEmpty_whenWeAddAnItemAndThenRemoveIt(
self):
cart = Cart()
cart.add_item('iPhone')
cart.remove_item('iPhone')
self.assertTrue(cart.is_empty())
def test_theNumberOfItemsShouldBe3_whenWeAdd3ItemsToTheCart(self):
cart = Cart()
cart.add_item('iPhone')
cart.add_item('Air Buds')
cart.add_item('Air Buds')
self.assertEqual(3, cart.size())
def test_itShouldTellTheQuantityOfSimilarItems_whenItemsAreAddedToTheCart(
self):
cart = Cart()
cart.add_item('iPhone')
cart.add_item('iPhone')
cart.add_item('Air Bud')
self.assertEqual(2, cart.count_of('iPhone'))
def test_theItemShouldNotExist_whenItsQuantityIsZero(self):
cart = Cart()
cart.add_item('iPhone')
cart.remove_item('iPhone')
self.assertEqual(False, cart.exists('iPhone'))
def test_theShoppingCartShouldNotBeEmpty_whenWeAddAnItemToTheCart(self):
cart = Cart() # Given
cart.add_item('iPhone') # When
self.assertFalse(cart.is_empty()) # Then