public void Undo()
{
var target = new UndoRedoList <int, List <int> >();
Assert.IsFalse(target.Undo());
target.Add(100);
Assert.IsTrue(target.CanUndo);
Assert.AreEqual(1, target.Count);
Assert.AreEqual(100, target[0]);
target.Add(200);
Assert.IsTrue(target.CanUndo);
Assert.IsFalse(target.CanRedo);
Assert.AreEqual(2, target.Count);
Assert.AreEqual(100, target[0]);
Assert.AreEqual(200, target[1]);
Assert.IsTrue(target.Undo());
Assert.IsTrue(target.CanUndo);
Assert.AreEqual(1, target.Count);
Assert.AreEqual(100, target[0]);
Assert.IsTrue(target.Undo());
Assert.IsFalse(target.CanUndo);
Assert.AreEqual(0, target.Count);
target.Add(300);
Assert.IsTrue(target.CanUndo);
target.Add(400);
target.RemoveAt(0);
Assert.IsTrue(target.CanUndo);
Assert.AreEqual(1, target.Count);
Assert.AreEqual(400, target[0]);
Assert.IsTrue(target.Undo());
Assert.IsTrue(target.CanUndo);
Assert.AreEqual(2, target.Count);
Assert.AreEqual(300, target[0]);
Assert.AreEqual(400, target[1]);
target.Add(500);
target[target.Count - 1] = 600;
Assert.AreEqual(3, target.Count);
Assert.AreEqual(600, target[target.Count - 1]);
Assert.IsTrue(target.CanUndo);
Assert.IsTrue(target.Undo());
Assert.AreEqual(3, target.Count);
Assert.AreEqual(500, target[target.Count - 1]);
target.Clear();
Assert.AreEqual(0, target.Count);
Assert.IsTrue(target.CanUndo);
Assert.IsTrue(target.Undo());
Assert.AreEqual(3, target.Count);
Assert.AreEqual(300, target[0]);
Assert.AreEqual(400, target[1]);
Assert.AreEqual(500, target[2]);
}
public void Clear()
{
var list = new UndoRedoList<int>(new int[] {1, 2, 3});
Assert.AreEqual(3, list.Count);
// clear
UndoRedoManager.Start("");
list.Clear();
UndoRedoManager.Commit();
Assert.AreEqual(0, list.Count);
// add
UndoRedoManager.Start("");
list.Add(1);
UndoRedoManager.Commit();
Assert.AreEqual(1, list.Count);
UndoRedoManager.Undo(); // undo add
Assert.AreEqual(0, list.Count);
UndoRedoManager.Undo(); // undo clear
Assert.AreEqual(3, list.Count);
UndoRedoManager.Redo(); // redo clear
Assert.AreEqual(0, list.Count);
UndoRedoManager.Redo(); // redo add
Assert.AreEqual(1, list.Count);
UndoRedoManager.Start("");
list.Add(1);
list.Add(2);
Assert.AreEqual(3, list.Count);
list.Clear();
Assert.AreEqual(0, list.Count);
UndoRedoManager.Commit();
Assert.AreEqual(0, list.Count);
UndoRedoManager.Undo(); // undo
Assert.AreEqual(1, list.Count);
}