def test_SimpleRedoUndo():
node = SceneNode()
parent_node = SceneNode()
operation = AddSceneNodeOperation(node, parent_node)
operation.redo()
assert node.getParent() == parent_node
operation.undo()
assert node.getParent() is None
def test_UndoRedoWithSelection():
node = SceneNode()
parent_node = SceneNode()
Selection.add(node)
operation = AddSceneNodeOperation(node, parent_node)
operation.undo()
assert not Selection.isSelected(node)
operation.redo()
assert Selection.isSelected(node)
