public function setNowSetsTheTimeReferenceInGmt()
{
$now = \DateTime::createFromFormat(DATE_RFC2822, 'Tue, 22 May 2012 12:00:00 +0200');
$response = new Response();
$response->setNow($now);
$this->assertEquals('Tue, 22 May 2012 10:00:00 +0000', $response->getHeader('Date')->format(DATE_RFC2822));
}