CartScopeDiscountPackager example

$cart = new Cart('foo');
        $cart->setLineItems(
            new LineItemCollection([
                $matchingLineItem,
                (new LineItem(Uuid::randomHex(), LineItem::PRODUCT_LINE_ITEM_TYPE, Uuid::randomHex()))->setStackable(true),
            ])
        );

        $priceDefinition = new AbsolutePriceDefinition(42, new LineItemRule(Rule::OPERATOR_EQ, [$matchingLineItem->getReferencedId() ?? '']));
        $discount = new DiscountLineItem('foo', $priceDefinition, ['discountScope' => 'foo', 'discountType' => 'bar'], null);

        $packager = new CartScopeDiscountPackager();
        $items = $packager->getMatchingItems($discount, $cart, $context);

        $expected = new DiscountPackageCollection([
            new DiscountPackage(
                new LineItemQuantityCollection([
                    new LineItemQuantity($matchingLineItem->getId(), 1),
                    new LineItemQuantity($matchingLineItem->getId(), 1),
                ])
            ),
        ]);