anchor.diff:              return callback();
             }
           },
  -        after, testCase);
  +        after, testNum);
     }
   
     invoke1(arg1) {
  
positive.code:  * case it must return a [Future].
   */
  void setUp(Function setupTest) {
    _requireNotRunning();
    _testSetup = setupTest;
  }
  
  
negative.code:             return callback(arg1);
            }
          },
          after, testNum);
    }
  
    invoke2(arg1, arg2) {
  