code: def generate_inputs(self):
      return (numpy.arange(self.size, dtype=numpy.int32) + 1,)
  
imports: import chainer
  import numpy
  import pytest
  import chainerx
  import chainerx.testing
  from chainerx_tests import array_utils
  from chainerx_tests import math_utils
  from chainerx_tests import op_utils
label_desc: Use image node_id 1 for calling the TestSumEachSize obj's underlying member method code with example usage: obj.generate_inputs() and returns: unknown