code: def test_list_credential_helpers(self) -> None:
      helpers = list_credential_helpers(folder=self.cache_dir)
      self.assertIn("cache", helpers)
      self.assertIn("store", helpers)
  
file_path: huggingface_hub/tests/test_utils_git_credentials.py
imports: import time
  import unittest
  from pathlib import Path
  import pytest
  from huggingface_hub.constants import ENDPOINT
  from huggingface_hub.utils import run_interactive_subprocess, run_subprocess
  from huggingface_hub.utils._git_credential import _parse_credential_output, list_credential_helpers, set_git_credential, unset_git_credential
label_desc: Use image node_id 2 for calling the TestGitCredentials obj's underlying member method code with example usage: obj.test_list_credential_helpers() without return types