def test_theNumberOfItemsShouldBeEmpty_whenWeAddAnItemAndThenRemoveIt(
self):
cart = Cart()
cart.add_item('iPhone')
cart.remove_item('iPhone')
self.assertTrue(cart.is_empty())
def test_theShoppingCartShouldBeEmpty_whenWeCreateANewCart(self):
cart = Cart()
self.assertTrue(cart.is_empty())
def test_theShoppingCartShouldNotBeEmpty_whenWeAddAnItemToTheCart(self):
cart = Cart() # Given
cart.add_item('iPhone') # When
self.assertFalse(cart.is_empty()) # Then