public void Test()
{
var originator = new Originator("field 2", 42)
{
Property1 = "property 1",
Field1 = "field 1"
};
Assert.That(originator.Field1, Is.EqualTo("field 1"));
Assert.That(originator.GetField2(), Is.EqualTo("field 2"));
Assert.That(originator.Property1, Is.EqualTo("property 1"));
Assert.That(originator.Property2, Is.EqualTo(42));
var memento = new Memento<Originator>(originator);
originator.Field1 = "field 1a";
originator.SetField2("field 2a");
originator.Property1 = "property 1a";
originator.SetProperty2(52);
Assert.That(originator.Field1, Is.EqualTo("field 1a"));
Assert.That(originator.GetField2(), Is.EqualTo("field 2a"));
Assert.That(originator.Property1, Is.EqualTo("property 1a"));
Assert.That(originator.Property2, Is.EqualTo(52));
memento.Restore(originator);
Assert.That(originator.Field1, Is.EqualTo("field 1"));
Assert.That(originator.GetField2(), Is.EqualTo("field 2"));
Assert.That(originator.Property1, Is.EqualTo("property 1"));
Assert.That(originator.Property2, Is.EqualTo(42));
}
/// <summary>
/// Entry point into console application.
/// </summary>
static void Main()
{
Originator o = new Originator();
o.State = "On";
// Store internal state
Caretaker c = new Caretaker();
c.Memento = o.CreateMemento();
// Continue changing originator
o.State = "Off";
// Restore saved state
o.SetMemento(c.Memento);
// Wait for user
Console.ReadKey();
}
/// <summary>
/// Entry point into console application.
/// </summary>
static void Main()
{
Originator o = new Originator();
o.State = "On";
// Store internal state
Caretaker c = new Caretaker();
c.Memento = o.CreateMemento();
// Continue changing originator
o.State = "Off";
// Restore saved state
o.SetMemento(c.Memento);
// Wait for user
Console.ReadKey();
}
public static void Mein()
{
var originator = new Originator("Hello world!");
var caretaker = new Caretaker(originator);
caretaker.Backup();
originator.DoSomething();
caretaker.Backup();
originator.DoSomething();
caretaker.Backup();
originator.DoSomething();
Console.WriteLine();
caretaker.ShowHistory();
// Undo the changes.
caretaker.Undo();
caretaker.ShowHistory();
caretaker.Undo();
caretaker.Undo();
}
public Caretaker(Originator originator) => _originator = originator;
public Caretaker(Originator originator)
{
this._originator = originator;
}