public function test_get_and_set_headers()
{
$request = new HttpRequest();
$headers = new HttpHeaders(['foo' => 'bar']);
$request->setHeaders($headers);
$this->assertEquals('bar', $request->getHeaders()->find('foo'));
$this->assertNull($request->getHeaders()->find('bar'));
$request->getHeaders()->set('bar', 'foo');
$this->assertEquals('foo', $request->getHeaders()->find('bar'));
$this->assertEquals('yolo', $request->getHeaders()->find('swag', 'yolo'));
}