code: def test_client_type_get_conn_returns_boto3_resource(self):
      ec2_hook = EC2Hook(api_type="client_type")
      instances = list(ec2_hook.get_instances())
      assert instances is not None
  
imports: from __future__ import annotations
  import pytest
  from moto import mock_ec2
  from airflow.exceptions import AirflowException
  from airflow.providers.amazon.aws.hooks.ec2 import EC2Hook
label_desc: Use image node_id 5 for calling the TestEC2Hook obj's underlying member method code with example usage: obj.test_client_type_get_conn_returns_boto3_resource() without return types