code: def test_check_connection(self, handler):
      res = handler.check_connection()
      assert res.success, res.error_message
  
file_path: mindsdb/tests/handler_tests/test_apache_doris_handler.py
imports: import pytest
  from mindsdb.integrations.handlers.apache_doris_handler.apache_doris_handler import ApacheDorisHandler
  from mindsdb.api.executor.data_types.response_type import RESPONSE_TYPE
label_desc: Use image node_id 4 for calling the TestMySQLHandler obj's underlying member method code with example usage: obj.test_check_connection(handler) without return types