def test_equal_2(self):
     self.assertEqual(sum_two_smallest_numbers([7, 15, 12, 18, 22]), 19)
 def test_equal_1(self):
     self.assertEqual(sum_two_smallest_numbers([5, 8, 12, 18, 22]), 13)
 def test_equal_4(self):
     self.assertEqual(sum_two_smallest_numbers([1, 8, 12, 18, -1]), 0)
 def test_equal_5(self):
     self.assertEqual(sum_two_smallest_numbers([-1, -1]), -2)
 def test_equal_3(self):
     self.assertEqual(sum_two_smallest_numbers([25, 42, 12, 18, 22]), 30)