anchor.diff:  
     CardMock(this.turned, this.id) : super();
   }
  -class GameMock extends Mock implements Game {}+class GameMock extends Mock implements Game {
  +  List score = [0, 0];
  +}
positive.code:     var card1, card2, card3;
      setUp(() {
        game = new GameMock();
        card1 = new CardMock(true, 1);
        card2 = new CardMock(true, 2);
        card3 = new CardMock(true, 3);
  
negative.code: /**
   * Unittests for pexeso game.
   */
  
  import 'package:unittest/unittest.dart';
  import 'package:unittest/mock.dart';
  import 'package:unittest/interactive_html_config.dart';
  import '../web/main.dart';
  import 'package:pexeso/pexeso_model.dart';
  import 'dart:html';
  
  