#!/usr/bin/env python3
# *-* coding:utf-8 *-*

import unittest
from bintree import BinTree, BinTreeNode

class TestBinTreeNode(unittest.TestCase):
    def test_has_left_and_right(self):
        node = BinTreeNode()
        self.assertIn("left", node.__dict__)
        self.assertIn("right", node.__dict__)

if __name__ == "__main__":
    unittest.main()