/**
* Test Expires
*/
public function testLastModifiedAsDate()
{
$date = new \DateTime('2012-12-12T12:12:12+00:00');
$this->cacheControl->setLastModified($date);
$this->assertEquals('Wed, 12 Dec 2012 12:12:12 GMT', $this->cacheControl->getLastModified());
$this->assertEquals('Wed, 12 Dec 2012 12:12:12 GMT', $this->response->getHeader('Last-Modified'));
}