code: public void sendTextMessage(String message) {
  		MessageEnvelope envelope = new MessageEnvelope();
  		ReceivedMessage body = new ReceivedMessage();
  
  		body.setText(message);
  		envelope.setMessage(body);
  		envelope.setSender(new User(facebookMockId));
  
  		System.out.println("Sending message: [" + message + "] as user : ["
  				+ facebookMockId + "].");
  		forward(envelope);
  		System.out.println("Sent!");
  	}
docs: Sends a text message to all the registered bots. Used to simulate a user
  typing in chat with your bot.
  
  @param message
  the message to send.