public static void TestMediator()
{
Console.WriteLine("----------------------Mediator----------------------");
AlarmSystem system = new AlarmSystem();
AlarmClock clock = new AlarmClock(system);
CoffeeMachine coffeeMachine = new CoffeeMachine(system);
Heater heater = new Heater(system);
Stereo stereo = new Stereo(system);
system.SetAlarmClock(clock);
system.SetCoffeeMachine(coffeeMachine);
system.SetHeater(heater);
system.SetStereo(stereo);
clock.AlarmOn();
Console.WriteLine("---------------------------------------------------\n");
}