def test_negatives(self):
     negative_lst = [-2, -4, -6, -7]
     solution(negative_lst)
     self.assertEqual(negative_lst, [-2, -4, -6, -7])
 def test_positive_negative(self):
     lst = [2, 4, 6, 7, -2, -3, -5, -10]
     solution(lst)
     self.assertEqual(lst, [-2, -3, -5, -10, 2, 4, 6, 7])
 def test_mixed(self):
     lst = [-3, 2, 4, -2, 6, 7, -5, -10]
     solution(lst)
     self.assertEqual(lst, [-3, -2, -5, -10, 2, 4, 6, 7])
 def test_positives(self):
     positive_lst = [2, 4, 6, 7]
     solution(positive_lst)
     self.assertEqual(positive_lst, [2, 4, 6, 7])