code: def setUp(self):
      super(ReaderTest, self).setUp()
      with mock.patch.object(
          example_parser, "ExampleParser", testing.DummyParser
      ):
          self.reader = reader_lib.Reader(self.tmp_dir, "some_spec")
          self.reader.read = functools.partial(
              self.reader.read,
              read_config=read_config_lib.ReadConfig(),
              shuffle_files=False,
          )
  
imports: import functools
  import itertools
  import os
  from unittest import mock
  import tensorflow
  import tensorflow_datasets
  from tensorflow_datasets import testing
  from tensorflow_datasets.core import example_parser
  from tensorflow_datasets.core import naming
  from tensorflow_datasets.core import reader
  from tensorflow_datasets.core import splits
  from tensorflow_datasets.core import writer
  from tensorflow_datasets.core.utils import read_config
  from tensorflow_datasets.core.utils import shard_utils
label_desc: Use image node_id 1 for calling the ReaderTest obj's underlying member method code with example usage: obj.setUp() without return types