code: def test_int8(self) -> None:
      self._test_numpy_helper_int_type(np.int8)
  
imports: import unittest
  from typing import Any
  import numpy
  import parameterized
  import onnx
  from onnx import helper, numpy_helper
label_desc: Use image node_id 5 for calling the TestNumpyHelper obj's underlying member method code with example usage: obj.test_int8() without return types