code: def test_config_list_empty_config(runner: CliRunner):
      res = runner.invoke(cli.app, "list", catch_exceptions=False)
      assert res.exit_code == 0
      assert res.stdout.strip() == ""
  
file_path: hail/hail/python/test/hailtop/hailctl/config/test_cli.py
imports: import os
  import pytest
  from typer.testing import CliRunner
  from hailtop.config.variables import ConfigVariable
  from hailtop.config.user_config import get_user_config_path
  from hailtop.hailctl.config import cli, config_variables
label_desc: Use image node_id 2 for calling a global function with example usage: test_config_list_empty_config(runner) without return types