<?php declare(strict_types=1);
/*
 * This file is part of PHPUnit.
 *
 * (c) Sebastian Bergmann <sebastian@phpunit.de>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */
namespace PHPUnit\TextUI\XmlConfiguration;

use function assert;
use DOMDocument;
use DOMElement;

/**
 * @internal This class is not covered by the backward compatibility promise for PHPUnit
 */
final class IntroduceCacheDirectoryAttribute implements Migration
{
    public function migrate(DOMDocument $document): void
    {
        $root = $document->documentElement;

        assert($root instanceof DOMElement);

        if ($root->hasAttribute('cacheDirectory')) {
            return;
        }

        $root->setAttribute('cacheDirectory', '.phpunit.cache');
    }
}
