code: def setUp(self):
      self._base_dir = os.path.join(self.get_temp_dir(), "base_dir")
      file_io.create_dir(self._base_dir)
      super().setUp()
  
imports: import os
  from unittest import mock
  import tensorflow
  from tfx.dsl.io import fileio
  from tfx.utils import io_utils
  from tensorflow.python.lib.io import file_io
label_desc: Use image node_id 1 for calling the IoUtilsTest obj's underlying member method code with example usage: obj.setUp() without return types