docstr: Tests whether the unzip_if_needed function works correctly on s3 json
  files
docstr_tok: ["Tests","whether","the","unzip_if_needed","function","works","correctly","on","s3","json","files"]
code: def test_s3_json(self):
      """Tests whether the unzip_if_needed function works correctly on s3 json
      files"""
  
      # this should work regardless of where th current working directory is.
      with tempfile.TemporaryDirectory() as tmp_dir:
          cwdir = os.getcwd()
          os.chdir(tmp_dir)
          unzipped_paths = _unzip_if_needed(
              [self.s3_path + "/large.json"], "json"
          )
          self.assertEqual(
              unzipped_paths[0],
              self.s3_path + "/large.json",
          )
  
          os.chdir(cwdir)
  
imports: import tempfile
  import os
  from pathlib import Path
  import unittest
  import pytest
  import ray
  from ray.rllib.algorithms.algorithm_config import AlgorithmConfig
  from ray.rllib.offline import IOContext
  from ray.rllib.offline.dataset_reader import DatasetReader, get_dataset_and_shards, _unzip_if_needed
label_desc: Use image node_id 5 for calling the TestUnzipIfNeeded obj's underlying member method code with example usage: obj.test_s3_json() without return types