code: def test_shape4(self):
      self.check_int8_sum((512, 256 * 256), axis=0)
      self.check_int8_sum((512, 256 * 256), axis=1)
  
      self.check_int8_sum((512 + 1, 256 * 256 + 1), axis=0)
      self.check_int8_sum((512 + 1, 256 * 256 + 1), 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 4 for calling the TestSimpleReductionFunction obj's underlying member method code with example usage: obj.test_shape4() without return types