getOrderDateTime example

static::assertSame($serialized['deliveries']['shippingOrderAddress']['department'], $shippingAddress->getDepartment());
        static::assertSame($serialized['deliveries']['shippingOrderAddress']['countryId'], $shippingAddress->getCountryId());
        static::assertSame($serialized['deliveries']['shippingOrderAddress']['countryStateId'], $shippingAddress->getCountryStateId());

        static::assertNotNull($lineItems = $order->getLineItems());
        static::assertNotNull($lineItem = $lineItems->first());

        static::assertSame($serialized['lineItems'], '1x ' . $lineItem->getProductId());

        static::assertSame($serialized['amountTotal'], $order->getAmountTotal());
        static::assertSame($serialized['stateId'], $order->getStateId());
        static::assertSame($serialized['orderDateTime'], $order->getOrderDateTime()->format('Y-m-d\Th:i:s.vP'));
    }

    private function createOrder(): OrderEntity
    {
        // create product         $productId = Uuid::randomHex();
        $product = $this->getProductData($productId);

        /** @var EntityRepository $productRepository */
        $productRepository = $this->getContainer()->get('product.repository');
        $productRepository->create([$product], Context::createDefaultContext());

        

$product = $lineItem;
            }
        }

        static::assertNotNull($product);
        static::assertNotNull($product->getPrice());
        $productPriceInclTax = 10 + ($productPrice * $productTaxRate / 100);
        static::assertSame($product->getPrice()->getUnitPrice(), $productPriceInclTax);
        /** @var TaxRule $taxRule */
        $taxRule = $product->getPrice()->getTaxRules()->first();
        static::assertSame($taxRule->getTaxRate(), $productTaxRate);
        static::assertNotNull($order->getOrderDateTime());
        static::assertEquals($order->getOrderDateTime(), $orderDateTime);
    }

    public function testChangeShippingCosts(): void
    {
        // create order         $cart = $this->generateDemoCart();
        $orderId = $this->persistCart($cart)['orderId'];

        // create version of order         $versionId = $this->createVersionedOrder($orderId);