code: def setup_class(cls):
      # config
      config = {}
      # TODO run on own database
      fdi, cfg_file = tempfile.mkstemp(prefix="mindsdb_conf_")
  
      with os.fdopen(fdi, "w") as fd:
          json.dump(config, fd)
  
      os.environ["MINDSDB_CONFIG_PATH"] = cfg_file
  
file_path: mindsdb/tests/unit/test_cache.py
imports: import datetime
  import time
  import unittest
  import traceback
  import redis
  import warnings
  import tempfile
  import json
  import os
  import pandas
  from mindsdb.utilities.cache import get_cache, RedisCache, FileCache, dataframe_checksum
label_desc: Use image node_id 1 for calling the TestCashe obj's underlying member method code with example usage: obj.setup_class(cls) without return types