code: def test_value_check_cpu(self):
      self.check_value_check(self.x, self.t)
  
imports: import unittest
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import functions
  from chainer import gradient_check
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 4 for calling the TestSelectItemValueCheck obj's underlying member method code with example usage: obj.test_value_check_cpu() without return types