public class SimpleRemoteControlTest{
  public static void main(String args[]){
    SimpleRemoteControl remote = new SimpleRemoteControl();

    Light light = new Light();
    LightOnCommand lightOn = new LightOnCommand(light); //pass the receiver to command

    remote.setCommand(lightOn); //set command to the slot
    remote.buttonWasPressed();  // simulate button press
  }
}