def test_unlock_locked_by_itself(self):
node = DirectoryNode("path_part", "parent")
child = FakeDirectoryNode()
node.children["child"] = child
node.lock()
node.unlock()
assert child.unlocker is node
def test_unlock_locked_by_another_node(self):
node = DirectoryNode("path_part", "parent")
child = FakeDirectoryNode()
node.children["child"] = child
node.lock("lock_owner")
node.unlock()
assert child.unlocker is None
