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Editing: ResponseHeaderSame.php

<?php

/*
 * This file is part of the Symfony package.
 *
 * (c) Fabien Potencier <fabien@symfony.com>
 *
 * For the full copyright and license information, please view the LICENSE
 * file that was distributed with this source code.
 */

namespace Symfony\Component\HttpFoundation\Test\Constraint;

use PHPUnit\Framework\Constraint\Constraint;
use Symfony\Component\HttpFoundation\Response;

final class ResponseHeaderSame extends Constraint
{
    private string $headerName;
    private string $expectedValue;

public function __construct(string $headerName, string $expectedValue)
    {
        $this->headerName = $headerName;
        $this->expectedValue = $expectedValue;
    }

public function toString(): string
    {
        return sprintf('has header "%s" with value "%s"', $this->headerName, $this->expectedValue);
    }

/**
     * @param Response $response
     */
    protected function matches($response): bool
    {
        return $this->expectedValue === $response->headers->get($this->headerName, null);
    }

/**
     * @param Response $response
     */
    protected function failureDescription($response): string
    {
        return 'the Response '.$this->toString();
    }
}

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