gistfile1.txt

<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
namespace Magento\Inventory\Test\Integration;

use Magento\InventoryApi\Api\ReservationBuilderInterface;
use Magento\TestFramework\Helper\Bootstrap;
use PHPUnit\Framework\TestCase;

class ReservationValidationTest extends TestCase
{
    /**
     * @var ReservationBuilderInterface
     */
    private $reservationBuilder;

    protected function setUp()
    {
        $this->reservationBuilder = Bootstrap::getObjectManager()->create(ReservationBuilderInterface::class);
    }

    public function testTypeDeclaration()
    {
        $reservation = $this->reservationBuilder
            // without any fields
            ->build();
    }
}