code: def setup_attrs(self, configured_app) -> None:
      self.app = configured_app
      self.client = self.app.test_client()  # type:ignore
      # we want only the connection created here for this test
      clear_db_connections(False)
  
imports: from __future__ import annotations
  import os
  from unittest import mock
  import pytest
  from airflow.api_connexion.exceptions import EXCEPTIONS_LINK_MAP
  from airflow.models import Connection
  from airflow.secrets.environment_variables import CONN_ENV_PREFIX
  from airflow.security import permissions
  from airflow.utils.session import provide_session
  from tests.test_utils.api_connexion_utils import assert_401, create_user, delete_user
  from tests.test_utils.config import conf_vars
  from tests.test_utils.db import clear_db_connections
  from tests.test_utils.www import _check_last_log
label_desc: Use image node_id 1 for calling the TestConnectionEndpoint obj's underlying member method code with example usage: obj.setup_attrs(configured_app) without return types