code: def test_hook(self) -> None:
      hook = EcsHook(region_name=REGION)
      assert hook.conn is not None
      assert hook.aws_conn_id == DEFAULT_CONN_ID
      assert hook.region_name == REGION
  
file_path: airflow/tests/providers/amazon/aws/hooks/test_ecs.py
imports: from __future__ import annotations
  from unittest import mock
  import pytest
  from airflow.providers.amazon.aws.exceptions import EcsOperatorError, EcsTaskFailToStart
  from airflow.providers.amazon.aws.hooks.ecs import EcsHook, should_retry, should_retry_eni
label_desc: Use image node_id 1 for calling the TestEksHooks obj's underlying member method code with example usage: obj.test_hook() without return types