code: def test_cli_connections_export_should_return_error_for_invalid_export_format(
      self, tmp_path
  ):
      output_filepath = tmp_path / "connections.invalid"
      args = self.parser.parse_args(
          ["connections", "export", output_filepath.as_posix()]
      )
      with pytest.raises(SystemExit, match=r"Unsupported file format"):
          connection_command.connections_export(args)
  
imports: from __future__ import annotations
  import json
  import os
  import re
  import shlex
  import warnings
  from contextlib import redirect_stdout
  from io import StringIO
  from unittest import mock
  import pytest
  from airflow.cli import cli_config, cli_parser
  from airflow.cli.commands import connection_command
  from airflow.exceptions import AirflowException
  from airflow.models import Connection
  from airflow.utils.db import merge_conn
  from airflow.utils.session import create_session, provide_session
  from tests.test_utils.db import clear_db_connections
label_desc: Use image node_id 4 for calling the TestCliExportConnections obj's underlying member method code with example usage: obj.test_cli_connections_export_should_return_error_for_invalid_export_format(tmp_path) without return types