public void CanRedoTest()
{
var mementoService = new MementoService();
Assert.IsFalse(mementoService.CanUndo);
mementoService.Add(new MockUndo());
Assert.IsTrue(mementoService.CanUndo);
mementoService.Undo();
Assert.IsFalse(mementoService.CanRedo);
mementoService.Add(new MockUndo(true));
Assert.IsTrue(mementoService.CanUndo);
mementoService.Undo();
Assert.IsFalse(mementoService.CanUndo);
Assert.IsTrue(mementoService.CanRedo);
mementoService.Redo();
Assert.IsTrue(mementoService.CanUndo);
Assert.IsFalse(mementoService.CanRedo);
}
public void HandlesDoubleRedo()
{
var obj = new MockModel {Value = "value1"};
var service = new MementoService();
service.RegisterObject(obj);
obj.Value = "value2";
obj.Value = "value3";
service.Undo();
Assert.AreEqual("value2", obj.Value);
service.Undo();
Assert.AreEqual("value1", obj.Value);
service.Redo();
Assert.AreEqual("value2", obj.Value);
service.Redo();
Assert.AreEqual("value3", obj.Value);
}
public void SetProperty()
{
var instance = new IniEntry();
var action = new PropertyChangeUndo(instance, "Key", "previousValue", "nextValue");
var mementoService = new MementoService();
mementoService.Add(action);
Assert.AreEqual(IniEntry.KeyProperty.GetDefaultValue(), instance.Key);
mementoService.Undo();
Assert.AreEqual("previousValue", instance.Key);
mementoService.Redo();
Assert.AreEqual("nextValue", instance.Key);
}
public void RedoTest()
{
var mementoService = new MementoService();
var undo1 = new MockUndo(true);
mementoService.Add(undo1);
mementoService.Undo();
Assert.IsTrue(undo1.UndoCalled);
Assert.IsFalse(undo1.RedoCalled);
Assert.IsTrue(mementoService.CanRedo);
mementoService.Redo();
Assert.IsTrue(undo1.RedoCalled);
Assert.IsFalse(mementoService.CanRedo);
}
public void CallActions()
{
var value = false;
var mementoService = new MementoService();
var action = new ActionUndo(this, () => value = true, () => value = false);
mementoService.Add(action);
Assert.IsFalse(value);
mementoService.Undo();
Assert.IsTrue(value);
mementoService.Redo();
Assert.IsFalse(value);
}