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
  
      db.init()
      migrate.migrate_to_head()
  
file_path: mindsdb/tests/unit/test_json_storage.py
imports: import tempfile
  import os
  import unittest
  import json
  from mindsdb.interfaces.storage import db
  from mindsdb.migrations import migrate
  from mindsdb.interfaces.storage.json import get_json_storage
label_desc: Use image node_id 1 for calling the Test obj's underlying member method code with example usage: obj.setup_class(cls) without return types