public function makeStandardsCompliantReturns412StatusIfUnmodifiedSinceDoesNotMatch()
{
$request = Request::create(new Uri('http://localhost'));
$response = new Response();
$unmodifiedSince = \DateTime::createFromFormat(DATE_RFC2822, 'Tue, 15 May 2012 09:00:00 GMT');
$lastModified = \DateTime::createFromFormat(DATE_RFC2822, 'Sun, 20 May 2012 08:00:00 UTC');
$request->setHeader('If-Unmodified-Since', $unmodifiedSince);
$response->setHeader('Last-Modified', $lastModified);
$response->makeStandardsCompliant($request);
$this->assertSame(412, $response->getStatusCode());
$response = new Response();
$unmodifiedSince = \DateTime::createFromFormat(DATE_RFC2822, 'Tue, 15 May 2012 09:00:00 GMT');
$lastModified = \DateTime::createFromFormat(DATE_RFC2822, 'Tue, 15 May 2012 08:00:00 UTC');
$request->setHeader('If-Unmodified-Since', $unmodifiedSince);
$response->setHeader('Last-Modified', $lastModified);
$response->makeStandardsCompliant($request);
$this->assertSame(200, $response->getStatusCode());
}