Method wrap

tests/btest.cpp:31–43

  { }
 private:
  virtual bool wrap()
  {
    switch (source++)
    {
      case 0: in = "Hello World!";
	      return true;
      case 1: in = "How now brown cow.";
	      return true;
      case 2: in = "An apple a day.";
	      return true;
    }
    return false;
  }
  int source;
};