public function setAndGetMaximumAgeSetsAndReturnsTheMaxAgeCacheControlDirective()
{
$response = new Response();
$response->setNow(new \DateTime());
$response->setMaximumAge(60);
$this->assertEquals('max-age=60', $response->getHeader('Cache-Control'));
$this->assertSame(60, $response->getMaximumAge());
}