public function testGetGroupInfo()
 {
     $request = new FaceRequest('key', 'secret', 'http://apicn.faceplusplus.com', 'POST', '/foo', []);
     $body = '{ "person": [ { "person_id": "c90cc7f5b7b1f09d0c4f5eef11f9f2d8", "tag": null, "person_name": "Alice" }, { "person_id": "f8ec506d7024c09dc3453ae7cb36f487", "tag": null, "person_name": "Bob" }, { "person_id": "a65a95d465bec754cecbdbd5733c617a", "tag": null, "person_name": "Carl" }, { "person_id": "25076b486aec1bfb183c653e452b987e", "tag": null, "person_name": "Daniel" }, { "person_id": "d55a335824ff5481583f689c771419da", "tag": null, "person_name": "Ethan" }, { "person_id": "d770ab718caeaa76ca06ca3f169829c1", "tag": null, "person_name": "Mike" }, { "person_id": "bd1e44d90f0949a0e8a2383548deadec", "tag": null, "person_name": "Steve" } ] }';
     $response = new FaceResponse($request, $body, 200, []);
     $persionList = $response->getGroupPersonList();
     $this->assertInstanceOf('FaceSDK\\Node\\Edge', $persionList);
     $this->assertInstanceOf('\\FaceSDK\\Node\\Person', $persionList[0]);
     $this->assertEquals('Alice', $persionList[0]->getName());
 }