public function testHeadersAlreadySent()
 {
     $headers = $this->getMock('Riimu\\Kit\\FileResponse\\Headers', ['headersSent']);
     $headers->expects($this->once())->method('headersSent')->will($this->returnValue(true));
     $handler = new ResponseHandler($headers);
     $this->setExpectedException('RuntimeException');
     $handler->send($this->getMock('Riimu\\Kit\\FileResponse\\Response\\Response'));
 }