def test_simple_rotation_with_right_right_tree(self):
node_10 = create_not_zig_zag_tree_right()
tree = AVL(node_10)
returned_tree = tree._simple_rotation(tree.get_root())
node_11 = tree.get_root()
node_10 = node_11.get_left_child()
node_12 = node_11.get_right_child()
expect(node_10.get_key()).to.be.equal(10)
expect(node_11.get_key()).to.be.equal(11)
expect(node_12.get_key()).to.be.equal(12)
expect(returned_tree).to.be.equal(node_11)
