code: def test_test_connection_use_dual_table(self):
      status, message = self.db_hook.test_connection()
      self.cur.execute.assert_called_once_with("select 1 from dual")
      assert status is True
      assert message == "Connection successfully tested"
  
imports: from __future__ import annotations
  import json
  from datetime import datetime
  from unittest import mock
  import numpy
  import oracledb
  import pytest
  from airflow.models import Connection
  from airflow.providers.oracle.hooks.oracle import OracleHook
label_desc: Use image node_id 14 for calling the TestOracleHook obj's underlying member method code with example usage: obj.test_test_connection_use_dual_table() without return types