createPromotionFixtureBuilder example

$productId1 = Uuid::randomHex();
        $productId2 = Uuid::randomHex();

        $code = 'BF' . Random::getAlphanumericString(5);

        // prepare promotion         $this->createTestFixtureProduct($productId1, 65, 19, $container, $this->context);
        $this->createTestFixtureProduct($productId2, 30, 7, $container, $this->context);

        // prepare a percentage promotion with 100% OFF         // with a set group of the 2 cheapest items.         $promotionBuilder = $this->createPromotionFixtureBuilder($container)
            ->addSetGroup('COUNT', 2, 'PRICE_ASC')
            ->setCode($code)
            ->addDiscount(PromotionDiscountEntity::SCOPE_SET, PromotionDiscountEntity::TYPE_PERCENTAGE, 100.0, false, null);
        $cart = $this->getCart($promotionBuilder, $productId1, $productId2, $code);

        static::assertEquals(65.0, $cart->getPrice()->getPositionPrice(), 'Position Total Price is wrong');
        static::assertEquals(65.0, $cart->getPrice()->getTotalPrice(), 'Total Price is wrong');
        static::assertEquals(54.62, $cart->getPrice()->getNetPrice(), 'Net Price is wrong');
        static::assertEquals(10.38, $cart->getPrice()->getCalculatedTaxes()->getAmount(), 'Taxes are wrong');
    }