anchor.diff:    void setUpTestSuite() {}
   
     /** Enqueues a synchronous test. */
  -  UnitTestSuite addTest(TestFunction body) {
  +  void addTest(TestFunction body) {
       test(null, body);
     }
   
  
positive.code:   _ensureActiveSuite();
  
    final testCase = new TestCase(
      _currentSuite._tests.length + 1, _fullSpec(spec), body, callbacks);
    _currentSuite._tests.add(testCase);
  
    if (callbacks < 1) {
  
negative.code:  */
  _ensureActiveSuite() {
    if (_currentSuite != null) {
      return;
    }
  
    _currentSuite = new UnitTestSuite();
  }
  
  /**
  