<!DOCTYPE html>
<html>
<head>
<script>

var value = 0;
var strings = new Array();

function setValue(newValue)
{
    var oldValue = value;
    UndoManager_addAction(setValue,oldValue);

    strings.push("value = "+newValue);
    value = newValue;
}

function performTest()
{
    setValue(1);
    setValue(2);
    UndoManager_newGroup();

    setValue(3);
    UndoManager_newGroup();

    setValue(4);
    setValue(5);
    setValue(6);
    UndoManager_newGroup();

    strings.push("\nOne step backwards, one step forwards");
    UndoManager_undo();
    UndoManager_redo();

    strings.push("\nTwo steps backwards, two steps forwards");
    UndoManager_undo();
    UndoManager_undo();
    UndoManager_redo();
    UndoManager_redo();

    strings.push("\nThree steps backwards, three steps forwards");
    UndoManager_undo();
    UndoManager_undo();
    UndoManager_undo();
    UndoManager_redo();
    UndoManager_redo();
    UndoManager_redo();

    strings.push("\nThree steps backwards");
    UndoManager_undo();
    UndoManager_undo();
    UndoManager_undo();

    strings.push("\nOne step forwards, one step backwards");
    UndoManager_redo();
    UndoManager_undo();

    strings.push("\nTwo steps forwards, two steps backwards");
    UndoManager_redo();
    UndoManager_redo();
    UndoManager_undo();
    UndoManager_undo();

    strings.push("\nThree steps forwards, three steps backwards");
    UndoManager_redo();
    UndoManager_redo();
    UndoManager_redo();
    UndoManager_undo();
    UndoManager_undo();
    UndoManager_undo();

    return strings.join("\n");
}
</script>
</head>
<body>
</body>
</html>