code: def setUp(self):
      self.in_size = 2
      self.out_size = 3
      self.pool_size = 4
  
imports: import unittest
  import numpy
  import six
  import chainer
  from chainer.backends import cuda
  from chainer import gradient_check
  from chainer.initializers import constant
  from chainer import links
  from chainer import testing
  from chainer.testing import attr
  from chainer.testing import condition
  from chainer.utils import type_check
label_desc: Use image node_id 1 for calling the TestInvalidInitialization obj's underlying member method code with example usage: obj.setUp() without return types