def METHOD_NAME(self):
    """
    Movea subtree and check that the new descendants are at the right place
    """
    self.set_parent(self.right_child, self.left_child)
    left_children_uuids = self.left_child.descendants(with_self=False).values_list("uuid", flat=True)
    right_children_uuids = self.right_child.descendants(with_self=False).values_list("uuid", flat=True)
    self.assertTrue(set(right_children_uuids).issubset(set(left_children_uuids)))