<?php
/**
 * Copyright © Magento, Inc. All rights reserved.
 * See COPYING.txt for license details.
 */
declare(strict_types=1);

use Magento\Quote\Model\Quote\Address\Rate;
use Magento\Quote\Model\QuoteFactory;
use Magento\Quote\Model\QuoteIdMaskFactory;
use Magento\Quote\Model\ResourceModel\Quote as QuoteResource;
use Magento\TestFramework\Helper\Bootstrap;
use Magento\TestFramework\Workaround\Override\Fixture\Resolver;

Resolver::getInstance()->requireDataFixture('Magento/Checkout/_files/quote_with_address.php');
/** @var QuoteFactory $quoteFactory */
$quoteFactory = Bootstrap::getObjectManager()->get(QuoteFactory::class);
/** @var QuoteResource $quoteResource */
$quoteResource = Bootstrap::getObjectManager()->get(QuoteResource::class);
$quote = $quoteFactory->create();
$quoteResource->load($quote, 'test_order_1', 'reserved_order_id');

/** @var $rate Rate */
$rate = Bootstrap::getObjectManager()->create(
    Rate::class
);
$rate->setCode('freeshipping_freeshipping');
$rate->getPrice(100);

$quote->getShippingAddress()->setShippingMethod('freeshipping_freeshipping');
$quote->getShippingAddress()->addShippingRate($rate);
$quote->getPayment()->setMethod('purchaseorder');

$quote->collectTotals();
$quote->save();
$quote->getPayment()->setMethod('purchaseorder');

$quoteIdMask = Bootstrap::getObjectManager()
    ->create(QuoteIdMaskFactory::class)
    ->create();
$quoteIdMask->setQuoteId($quote->getId());
$quoteIdMask->setDataChanges(true);
$quoteIdMask->save();