code: def test_shape3(self):
      for i in range(1, 10):
          self.check_int8_sum((2**i, 1000), axis=1)
          self.check_int8_sum((2**i - 1, 1000), axis=1)
          self.check_int8_sum((2**i + 1, 1000), axis=1)
  
imports: import unittest
  import numpy
  import pytest
  import cupy
  import cupy._core._accelerator
  from cupy import _core
  from cupy import testing
label_desc: Use image node_id 3 for calling the TestSimpleReductionFunction obj's underlying member method code with example usage: obj.test_shape3() without return types