text: import unittest
  from .problem_9 import find_max_sum
  
  
  class Problem9TestCase(unittest.TestCase):
      list1 = [5, 1, 1, 5]
      list2 = [2, 4, 6, 2, 5]
  
      def test_find_max_sum_1(self):
          self.assertEqual(10, find_max_sum(self.list1))
  
      def test_find_max_sum_2(self):
          self.assertEqual(13, find_max_sum(self.list2))
  
  
  if __name__ == "__main__":
      unittest.main()