public function testXSendfile() {
$request = Request::create('/');
$request->headers
->set('X-Sendfile-Type', 'X-Sendfile');
BinaryFileResponse::trustXSendfileTypeHeader();
$response = BinaryFileResponse::create('README.md');
$response
->prepare($request);
$this
->expectOutputString('');
$response
->sendContent();
$this
->assertContains('README.md', $response->headers
->get('X-Sendfile'));
}