ResponseHeaderBag example

        $headers = [
            'fOo' => 'BAR',
            'ETag' => 'xyzzy',
            'Content-MD5' => 'Q2hlY2sgSW50ZWdyaXR5IQ==',
            'P3P' => 'CP="CAO PSA OUR"',
            'WWW-Authenticate' => 'Basic realm="WallyWorld"',
            'X-UA-Compatible' => 'IE=edge,chrome=1',
            'X-XSS-Protection' => '1; mode=block',
        ];

        $bag = new ResponseHeaderBag($headers);
        $allPreservedCase = $bag->allPreserveCase();

        foreach (array_keys($headers) as $headerName) {
            $this->assertArrayHasKey($headerName, $allPreservedCase, '->allPreserveCase() gets all input keys in original case');
        }
    }

    public function testCacheControlHeader()
    {
        $bag = new ResponseHeaderBag([]);
        $this->assertEquals('no-cache, private', $bag->get('Cache-Control'));
        

    private array $sentHeaders;

    /** * @param int $status The HTTP status code (200 "OK" by default) * * @throws \InvalidArgumentException When the HTTP status code is not valid */
    public function __construct(?string $content = '', int $status = 200, array $headers = [])
    {
        $this->headers = new ResponseHeaderBag($headers);
        $this->setContent($content);
        $this->setStatusCode($status);
        $this->setProtocolVersion('1.0');
    }

    /** * Returns the Response as an HTTP string. * * The string representation of the Response is the same as the * one that will be sent to the client only if the prepare() method * has been called before. * * @see prepare() */

    private array $sentHeaders;

    /** * @param int $status The HTTP status code (200 "OK" by default) * * @throws \InvalidArgumentException When the HTTP status code is not valid */
    public function __construct(?string $content = '', int $status = 200, array $headers = [])
    {
        $this->headers = new ResponseHeaderBag($headers);
        $this->setContent($content);
        $this->setStatusCode($status);
        $this->setProtocolVersion('1.0');
    }

    /** * Returns the Response as an HTTP string. * * The string representation of the Response is the same as the * one that will be sent to the client only if the prepare() method * has been called before. * * @see prepare() */