code: def test_shape1(self):
      for i in range(1, 10):
          self.check_int8_sum((2**i,))
          self.check_int8_sum((2**i - 1,))
          self.check_int8_sum((2**i + 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 1 for calling the TestSimpleReductionFunction obj's underlying member method code with example usage: obj.test_shape1() without return types