function testNotModified()
{
$response = new Response();
$response->setHeaders(array("Allow" => "", "Content-Encoding" => "", "Content-Language" => "", "Content-Length" => "", "Content-MD5" => "", "Content-Type" => "", "Last-Modified" => ""));
$response->notModified();
$this->assertEquals(304, $response->getStatus());
$this->assertEmpty($response->getHeaders());
}