public void Test_Demo()
{
OriginatorDemo originator = new OriginatorDemo($"State at { DateTime.Now.ToShortTimeString() }");
CaretakerDemo caretaker = new CaretakerDemo(originator);
caretaker.BackUp();
originator.DoSomething();
caretaker.BackUp();
originator.DoSomething();
caretaker.BackUp();
originator.DoSomething();
caretaker.BackUp();
originator.DoSomething();
Console.WriteLine();
caretaker.ShowHistory();
Console.WriteLine();
caretaker.Undo();
caretaker.Undo();
Console.WriteLine("After undo 2 times.");
caretaker.DisplayTheLastState();
}
public CaretakerDemo(OriginatorDemo originator)
{
_originator = originator;
}
