code: def test_connect(self, handler):
      handler.connect()
      assert handler.is_connected, "connection error"
  
imports: import time
  import os
  import shutil
  import tarfile
  import pytest
  import docker
  from mindsdb.integrations.handlers.mysql_handler.mysql_handler import MySQLHandler
  from mindsdb.api.executor.data_types.response_type import RESPONSE_TYPE
label_desc: Use image node_id 1 for calling the TestMariaDBHandler obj's underlying member method code with example usage: obj.test_connect(handler) without return types