public function testResponseChangeHeaders()
{
$response = new Response('Body', 404);
$this->assertEquals($response->getStatus()->getCode(), 404);
$this->assertEquals($response->getBody(), 'Body');
$response->addHeader('Auth', 'author');
$this->assertEquals($response->getStatus()->getCode(), 404);
$this->assertEquals($response->getHeaders(), array('Auth' => 'author'));
$response->addHeader('Auth', 'author_change');
$this->assertEquals($response->getHeaders(), array('Auth' => 'author_change'));
}