      def test_check_balance(self):
          assert_equal(check_balance(None), False)
  
          node = Node(5)
          insert(node, 3)
          insert(node, 8)
          insert(node, 1)
          insert(node, 4)
          assert_equal(check_balance(node), True)
 
</s>
        assert_equal(check_balance(node), True)

      def test_check_balance(self):
          assert_equal(check_balance(None), False)
  
          node = Node(5)
        assert_equal(check_balance(node), True)

          insert(node, 3)
          insert(node, 8)
          insert(node, 1)
          insert(node, 4)
          assert_equal(check_balance(node), True)
keep keep keep add keep keep keep keep keep
 Polish check tree balance challenge and solution (#80)

Update constraints, test cases, tests, and code.
graphs_trees/check_balance/test_check_balance.py