anchor.diff:   */
   void xit(String description, Task test){
     checkEnvironment();
  +  assert(_environment.runner.currentRunning != null);
  +  assert(_environment.runner.currentRunning.isSuite());
     _environment.runner.add(new TestPiece.xit(description, test));
   }
   
  
positive.code:   
    void run(){
      _environment.reporter.onRunnerStart();
      
      for(TestPiece piece in tests){
        piece.run();
      }
      
      _environment.reporter.onRunnerResult(this);
    }
  
    void add(TestPiece piece){
  
negative.code: 
  #library('teaolive');
  
  #import('dart:coreimpl');
  
  #import('reporter/teaolive_text_reporter.dart');
  
  /** Task. Represent an action, such as testing and cleanup. */
  