code: def test_get_tokenizer_config(self):
      # Check we can load the tokenizer config of an online model.
      config = get_tokenizer_config("bert-base-cased")
      _ = config.pop("_commit_hash", None)
      # If we ever update bert-base-cased tokenizer config, this dict here will need to be updated.
      self.assertEqual(config, {"do_lower_case": False})
  
      # This model does not have a tokenizer_config so we get back an empty dict.
      config = get_tokenizer_config(SMALL_MODEL_IDENTIFIER)
      self.assertDictEqual(config, {})
  
      # A tokenizer saved with `save_pretrained` always creates a tokenizer config.
      tokenizer = AutoTokenizer.from_pretrained(SMALL_MODEL_IDENTIFIER)
      with tempfile.TemporaryDirectory() as tmp_dir:
          tokenizer.save_pretrained(tmp_dir)
          config = get_tokenizer_config(tmp_dir)
  
      # Check the class of the tokenizer was properly saved (note that it always saves the slow class).
      self.assertEqual(config["tokenizer_class"], "BertTokenizer")
  
imports: import os
  import shutil
  import sys
  import tempfile
  import unittest
  from pathlib import Path
  import pytest
  import transformers
  from transformers import BERT_PRETRAINED_CONFIG_ARCHIVE_MAP, GPT2_PRETRAINED_CONFIG_ARCHIVE_MAP, AutoTokenizer, BertConfig, BertTokenizer, BertTokenizerFast, CTRLTokenizer, GPT2Tokenizer, GPT2TokenizerFast, PreTrainedTokenizerFast, RobertaTokenizer, RobertaTokenizerFast, is_tokenizers_available
  from transformers.models.auto.configuration_auto import CONFIG_MAPPING, AutoConfig
  from transformers.models.auto.tokenization_auto import TOKENIZER_MAPPING, get_tokenizer_config, tokenizer_class_from_name
  from transformers.models.roberta.configuration_roberta import RobertaConfig
  from transformers.testing_utils import DUMMY_DIFF_TOKENIZER_IDENTIFIER, DUMMY_UNKNOWN_IDENTIFIER, SMALL_MODEL_IDENTIFIER, RequestCounter, require_tokenizers, slow
  from test_module.custom_configuration import CustomConfig
  from test_module.custom_tokenization import CustomTokenizer
label_desc: Use image node_id 17 for calling the AutoTokenizerTest obj's underlying member method code with example usage: obj.test_get_tokenizer_config() without return types