'Construct the URL to the ecommerce checkout page and include products.
Args:
skus (list): List of SKUs associated with products to be added to basket
Returns:
Absolute path to the ecommerce checkout page showing basket that contains specified products.
Example:
http://localhost:8002/basket/add/?sku=5H3HG5&sku=57FHHD'

def get_checkout_page_url(self, *skus):

    return '{checkout_page_path}?{skus}'.format(checkout_page_path=self.get_absolute_ecommerce_url(self.config.MULTIPLE_ITEMS_BASKET_PAGE_URL), skus=urlencode({'sku': skus}, doseq=True))
