from registrasion.controllers.cart import CartController

from registrasion import models as rego

from django.core.exceptions import ObjectDoesNotExist

class TestingCartController(CartController):

    def set_quantity(self, product, quantity, batched=False):

        ''' Sets the _quantity_ of the given _product_ in the cart to the given

        _quantity_. '''

        self.set_quantities(((product, quantity),))

    def add_to_cart(self, product, quantity):

        ''' Adds _quantity_ of the given _product_ to the cart. Raises

        ValidationError if constraints are violated.'''

        try:

            product_item = rego.ProductItem.objects.get(

                cart=self.cart,

                product=product)

            old_quantity = product_item.quantity

        except ObjectDoesNotExist:

            old_quantity = 0

        self.set_quantity(product, old_quantity + quantity)

    def next_cart(self):

        self.cart.active = False

        self.cart.save()