code: def test_dag_cli_should_display_help(self):
      parser = cli_parser.get_parser(dag_parser=True)
  
      all_command_as_args = [
          command_as_args
          for top_command in cli_config.dag_cli_commands
          for command_as_args in (
              [[top_command.name]]
              if isinstance(top_command, cli_parser.ActionCommand)
              else [
                  [top_command.name, nested_command.name]
                  for nested_command in top_command.subcommands
              ]
          )
      ]
      for cmd_args in all_command_as_args:
          with pytest.raises(SystemExit):
              parser.parse_args([*cmd_args, "--help"])
  
imports: from __future__ import annotations
  import argparse
  import contextlib
  import os
  import re
  import subprocess
  import sys
  import timeit
  from collections import Counter
  from importlib import reload
  from io import StringIO
  from pathlib import Path
  from unittest.mock import MagicMock, patch
  import pytest
  from airflow.cli import cli_config, cli_parser
  from airflow.cli.cli_config import ActionCommand, core_commands, lazy_load_command
  from airflow.cli.utils import CliConflictError
  from airflow.configuration import AIRFLOW_HOME
  from airflow.executors.local_executor import LocalExecutor
  from tests.test_utils.config import conf_vars
label_desc: Use image node_id 11 for calling the TestCli obj's underlying member method code with example usage: obj.test_dag_cli_should_display_help() without return types