code: def setUpClass(cls):
      cls.kwargs = {
          "connection_data": {
              "client_id": 15253,
              "client_secret": "BxmSvbrRW5iYEIQR",
          }
      }
      cls.handler = MendeleyHandler(
          "test_mendeley_handler", **cls.kwargs
      )
  
imports: import unittest
  from mindsdb.integrations.handlers.mendeley_handler.mendeley_handler import MendeleyHandler
  from mindsdb.api.executor.data_types.response_type import RESPONSE_TYPE
label_desc: Use image node_id 1 for calling the MendeleyHandlerTest obj's underlying member method code with example usage: obj.setUpClass(cls) without return types