code: def setUp(self):
      self.root = download.get_dataset_directory(
          os.path.join("pfnet", "chainer", "cifar")
      )
  
imports: import os
  import unittest
  import mock
  import numpy
  from chainer.dataset import download
  from chainer.datasets import get_cifar10
  from chainer.datasets import get_cifar100
  from chainer.datasets import tuple_dataset
  from chainer import testing
  from chainer.testing import attr
label_desc: Use image node_id 1 for calling the TestCifar obj's underlying member method code with example usage: obj.setUp() without return types