code: def test_shape5(self):
      block_size = 512
      size = (2 << 32) // block_size
      self.check_int8_sum((size, 1), axis=1)
      self.check_int8_sum((size, 1), axis=0)
  
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 5 for calling the TestSimpleReductionFunction obj's underlying member method code with example usage: obj.test_shape5() without return types