code: def test_0_check_connection(self):
      assert self.handler.check_connection()
  
file_path: mindsdb/mindsdb/integrations/handlers/bigquery_handler/tests/test_bigquery_handler.py
imports: import unittest
  from mindsdb.integrations.handlers.bigquery_handler.bigquery_handler import BigQueryHandler
  from mindsdb.integrations.libs.response import RESPONSE_TYPE
label_desc: Use image node_id 2 for calling the BigQueryHandlerTest obj's underlying member method code with example usage: obj.test_0_check_connection() without return types