code: def test_start_help():
      runner = CliRunner()
      res = runner.invoke(
          start,
          ["--help"],
          catch_exceptions=False,
      )
      assert res.exit_code == 0
  
imports: from click.testing import CliRunner
  from mlflow.gateway.cli import start
label_desc: Use image node_id 1 for calling a global function with example usage: test_start_help() without return types