public function testSeeHeaders()
{
$response = new \Symfony\Component\BrowserKit\Response("", 200, ['Cache-Control' => ['no-cache', 'no-store'], 'Content_Language' => 'en-US']);
$this->module->client->mockResponse($response);
$this->module->sendGET('/');
$this->module->seeHttpHeader('Cache-Control');
$this->module->seeHttpHeader('content_language', 'en-US');
$this->module->seeHttpHeader('Content-Language', 'en-US');
$this->module->dontSeeHttpHeader('Content-Language', 'en-RU');
$this->module->dontSeeHttpHeader('Content-Language1');
$this->module->seeHttpHeaderOnce('Content-Language');
$this->assertEquals('en-US', $this->module->grabHttpHeader('Content-Language'));
$this->assertEquals('no-cache', $this->module->grabHttpHeader('Cache-Control'));
$this->assertEquals(['no-cache', 'no-store'], $this->module->grabHttpHeader('Cache-Control', false));
}