/**
* @test
*/
public function getAgeReturnsTimeSpecifiedInAgeHeaderIfExists()
{
$now = \DateTime::createFromFormat(DATE_RFC2822, 'Tue, 22 May 2012 12:00:00 GMT');
$response = new Response();
$response->setNow($now);
$response->setHeader('Age', 123);
$this->assertSame(123, $response->getAge());
}