public function testGetDate()
{
$response = new Response('', 200, array('Date' => $this->createDateTimeOneHourAgo()->format(DATE_RFC2822)));
$this->assertEquals(0, $this->createDateTimeOneHourAgo()->diff($response->getDate())->format('%s'), '->getDate() returns the Date header if present');
$response = new Response();
$date = $response->getDate();
$this->assertLessThan(1, $date->diff(new \DateTime(), true)->format('%s'), '->getDate() returns the current Date if no Date header present');
$response = new Response('', 200, array('Date' => $this->createDateTimeOneHourAgo()->format(DATE_RFC2822)));
$now = $this->createDateTimeNow();
$response->headers->set('Date', $now->format(DATE_RFC2822));
$this->assertEquals(0, $now->diff($response->getDate())->format('%s'), '->getDate() returns the date when the header has been modified');
}
