code: def test_max_contiguous_subsequence_sum(self):
      arr1 = [-2, 3, 8, -1, 4]
      arr2 = [-1, 1, 0]
      arr3 = [-1, -3, -4]
      arr4 = [-2, 3, 8, -12, 8, 4]
  
      self.assertEqual(max_contiguous_subsequence_sum(arr1), 14)
      self.assertEqual(max_contiguous_subsequence_sum(arr2), 1)
      self.assertEqual(max_contiguous_subsequence_sum(arr3), -1)
      self.assertEqual(max_contiguous_subsequence_sum(arr4), 12)
  
imports: from algorithms.greedy import max_contiguous_subsequence_sum
  import unittest
label_desc: Use image node_id 1 for calling the TestMaxContiguousSubsequenceSum obj's underlying member method code with example usage: obj.test_max_contiguous_subsequence_sum() without return types