code: def test_init(self):
      self.assertIs(self.mlp.activation, functions.sigmoid)
  
      self.assertEqual(len(self.mlp), 3)
      for i, conv in enumerate(self.mlp):
          self.assertIsInstance(conv, links.Convolution2D)
          if i == 0:
              self.assertEqual(conv.W.data.shape, (96, 3, 11, 11))
          else:
              self.assertEqual(conv.W.data.shape, (96, 96, 1, 1))
  
imports: import unittest
  import mock
  import numpy
  import chainer
  from chainer.backends import cuda
  from chainer import functions
  from chainer import links
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 2 for calling the TestMLPConvolution2D obj's underlying member method code with example usage: obj.test_init() without return types