public void MementoTest()
{
const string originalState = "Super-duper-super-puper-super.";
// Client code.
var originator = new Originator(originalState);
var caretaker = new Caretaker(originator);
caretaker.Backup();
var a = originator.DoSomething();
caretaker.Backup();
var b = originator.DoSomething();
caretaker.Backup();
var history = caretaker.ShowHistory();
history.Count.Should().Be(3);
history[0].Should().Contain(originalState);
history[1].Should().Contain(a);
history[2].Should().Contain(b);
caretaker.Undo();
history = caretaker.ShowHistory();
history.Count.Should().Be(2);
history[0].Should().Contain(originalState);
history[1].Should().Contain(a);
caretaker.Undo();
history = caretaker.ShowHistory();
history.Count.Should().Be(1);
history[0].Should().Contain(originalState);
}
public static void TestMemento()
{
Originator originator = new Originator("Init state");
Caretaker caretaker = new Caretaker(originator);
caretaker.Backup();
originator.DoSomething();
caretaker.Backup();
originator.DoSomething();
caretaker.Backup();
originator.DoSomething();
Console.WriteLine();
caretaker.ShowHistory();
Console.WriteLine("\nClient: Now, let's rollback!\n");
caretaker.Undo();
Console.WriteLine("\n\nClient: Once more!\n");
caretaker.Undo();
Console.WriteLine("\n\nClient: Once more!\n");
caretaker.Undo();
Console.WriteLine("\n\nClient: Once more!\n");
caretaker.Undo();
Console.WriteLine();
}
public void Get()
{
// Client code.
Originator originator = new Originator("Super-duper-super-puper-super.");
Caretaker caretaker = new Caretaker(originator);
caretaker.Backup();
originator.DoSomething();
caretaker.Backup();
originator.DoSomething();
caretaker.Backup();
originator.DoSomething();
Console.WriteLine();
caretaker.ShowHistory();
Console.WriteLine("\nClient: Now, let's rollback!\n");
caretaker.Undo();
Console.WriteLine("\n\nClient: Once more!\n");
caretaker.Undo();
Console.WriteLine();
}
static void Main(string[] args)
{
Originator originator = new Originator("NusmirSmajovic");
Caretaker caretaker = new Caretaker(originator);
caretaker.Backup();
originator.DoSomething();
caretaker.Backup();
originator.DoSomething();
caretaker.Backup();
originator.DoSomething();
Console.WriteLine();
caretaker.ShowHistory();
Console.WriteLine("\nClient: gå tillbaka!\n");
caretaker.Undo();
Console.WriteLine("\n\nClient: En gång till!\n");
caretaker.Undo();
Console.WriteLine("\nClient: gå tillbaka!\n");
caretaker.Redo();
Console.WriteLine("\n\nClient: En gång till!\n");
caretaker.Redo();
Console.WriteLine();
caretaker.ShowHistory();
Console.WriteLine();
}
public void Memento_Pattern_Test()
{
var originator = new Originator("super-super-super-super");
var caretaker = new Caretaker(originator);
var obj1 = caretaker.Backup();
Assert.AreEqual("super-super-super-super", obj1.GetState());
originator.DoSomething();
var obj2 = caretaker.Backup();
Assert.AreNotEqual("super-super-super-super", obj2.GetState());
var obj3 = caretaker.Undo();
Assert.AreEqual("super-super-super-super", obj3.GetState());
}