code: def test_riemann_0(self) -> None:
      with self.assertRaises(AssertionError):
          step_sizes, alphas = riemann_builders()
          step_sizes(0)
          alphas(0)
  
file_path: captum/tests/attr/test_approximation_methods.py
imports: import unittest
  from typing import List
  import torch
  from captum.attr._utils.approximation_methods import Riemann, riemann_builders
  from tests.helpers.basic import assertTensorAlmostEqual
label_desc: Use image node_id 2 for calling the Test obj's underlying member method code with example usage: obj.test_riemann_0() without return types