code: def test_get_dataset_directory(self):
      root = dataset.get_dataset_root()
      path = dataset.get_dataset_directory("test", False)
      self.assertEqual(path, os.path.join(root, "test"))
  
imports: import os
  import shutil
  import tempfile
  import unittest
  import mock
  from chainer import dataset
  from chainer import testing
label_desc: Use image node_id 1 for calling the TestGetDatasetDirectory obj's underlying member method code with example usage: obj.test_get_dataset_directory() without return types