anchor.diff:      }
   
       if(result == false){
  -      throw new AssersionException.msg("expected is ${buffer.toString()}<${expect}>, but got <${actual}>.");
  -    }
  -  }
  -}
  +      throw new AssertionException.msg("expected is ${buffer.toString()}<${expect}>, but got <${actual}>.");
  +    }
  +  }
  +}
  
positive.code:   }
  }
  
  class AssersionException implements Exception {
    String msg;
    
    AssersionException.msg(this.msg) : super() ;
  }
  
  typedef bool _op(StringBuffer buffer, bool result);
  
negative.code:     start = true;
      try{
        test();
      } catch(AssertionException e) {
        errorMessage = e.msg;
        error = e;
        return;
  