def test_computesum(self):
self.assertEqual(compute_sum([1, 2, 3, [4, 6]]), 16)
def test_input_is_not_list(self):
self.assertEqual(compute_sum((1, 2, 3)),
'Invalid argument type. This should be a list')
def test_computesum_with_negative_items(self):
self.assertEqual(compute_sum([1, -2, -3, [4, 6]]), 6)