code: def test_config_to_env():
      assert config_to_env(CONFIG) == ENV
  
file_path: dvc/tests/unit/utils/test_studio.py
imports: from urllib.parse import urljoin
  import pytest
  from requests import Response
  from dvc.env import DVC_STUDIO_OFFLINE, DVC_STUDIO_REPO_URL, DVC_STUDIO_TOKEN, DVC_STUDIO_URL
  from dvc.utils.studio import STUDIO_URL, config_to_env, env_to_config, notify_refs
label_desc: Use image node_id 2 for calling a global function with example usage: test_config_to_env() without return types