def test_index_cumprod_a(self) -> None:
idx1 = IndexGO(range(1, 11, 2))
# sum applies to the labels
self.assertEqual(idx1.sum(), 25)
self.assertEqual(idx1.cumprod().tolist(), [1, 3, 15, 105, 945])
def test_index_ufunc_axis_b(self) -> None:
idx = IndexGO((30, 40, 20))
idx.append(10)
self.assertEqual(idx.sum(), 100)
