def test_detach_noop(self):
tracker = self.tracker()
node = Node("node", None, None)
node = node.detach()
assert not node.parent
assert not node.root
parent2 = Node("parent2", None, tracker.root)
parent2.addchild(node)
assert list(parent2.children) == [node]
assert node.root is tracker.root
assert node.parent is parent2
def test_remove_child(self):
tracker = self.tracker()
parent1 = Node("parent1", None, tracker.root)
parent2 = Node("parent2", None, tracker.root)
child = Node("child", None, parent1)
parent1.addchild(child)
assert list(parent1.children) == [child]
assert child.parent is parent1
child = child.detach()
assert child.parent is None
assert list(parent1.children) == []
child.parent = parent2
parent2.addchild(child)
assert list(parent2.children) == [child]
assert child.parent is parent2