public void CancelsSubscriptionForInstance()
{
var obj = new MockModel {Value = "value1"};
var service = new MementoService();
service.RegisterObject(obj);
service.UnregisterObject(obj);
obj.Value = "newvalue";
Assert.IsFalse(service.CanUndo);
}
public void ClearsCurrentUndoRedoStackForInstance()
{
var obj = new MockModel {Value = "value1"};
var service = new MementoService();
service.RegisterObject(obj);
obj.Value = "newvalue1";
Assert.IsFalse(service.CanRedo);
service.UnregisterObject(obj);
Assert.IsFalse(service.CanUndo);
}
public void HandlesDoubleUndo()
{
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);
}
