code: def forward_expected(self, link, inputs):
      (x,) = inputs
      y = link(x).array
      return (y,)
  
imports: import unittest
  import numpy
  import pytest
  import six.moves.cPickle
  import chainer
  from chainer.backends import cuda
  from chainer import functions
  from chainer import links
  from chainer import memory_layouts
  from chainer import testing
  from chainer.testing import attr
  from chainer.utils import conv
label_desc: Use image node_id 5 for calling the TestConvolution2DParameterShapePlaceholder obj's underlying member method code with example usage: obj.forward_expected(link, inputs) and returns: y