public void TestSaveStateMethod()
{
SnapshotMemento memento = new SnapshotMemento();
MementoObj obj = new MementoObj();
obj.Name = "Test";
memento.saveState(obj);
obj.Name = string.Empty;
obj = memento.restoreState(obj);
if (obj.Name != "Test")
{
throw new Exception("Failed");
}
}
public void TestPushStateMethod()
{
SnapshotMemento memento = new SnapshotMemento();
MementoObj obj = new MementoObj();
obj.Name = "Object 1";
memento.pushState(obj);
//Pulled back obj
obj.Name = "New Object 1";
memento.pushState(obj);
obj.Name = "New Object 2";
memento.pushState(obj);
obj.Name = "New Object 3";
memento.pushState(obj);
obj = memento.restoreState(obj, -1);
//Return same object, because we cant return 0 objects ou lesser
if (obj.Name != "New Object 3")
{
throw new Exception("Failed on 0 or less");
}
//Return previous 2 from pushed list
obj = memento.restoreState(obj, 2);
if (obj.Name != "New Object 2")
{
throw new Exception("Failed when getting Previous state");
}
//Returns first pushed object
obj = memento.restoreState(obj, 20);
if (obj.Name != "Object 1")
{
throw new Exception("Failed when getting state index higher than count");
}
}
