public function testIsSecure()
 {
     $request = new HttpRequest([], [], [], [], []);
     $this->assertFalse($request->isSecure());
     $request = new HttpRequest([], [], [], [], ['HTTPS' => 'off']);
     $this->assertFalse($request->isSecure());
     $request = new HttpRequest([], [], [], [], ['HTTPS' => 'on']);
     $this->assertTrue($request->isSecure());
 }