/**
  * Assert that discount is equal to expected.
  *
  * @param CheckoutCart $checkoutCart
  * @param Cart $cart
  * @return void
  */
 public function processAssert(CheckoutCart $checkoutCart, Cart $cart)
 {
     $checkoutCart->open();
     $checkoutCart->getTotalsBlock()->waitForUpdatedTotals();
     \PHPUnit_Framework_Assert::assertEquals(number_format($cart->getDiscount(), 2), $checkoutCart->getTotalsBlock()->getDiscount(), 'Discount amount in the shopping cart not equals to discount amount from fixture.');
 }