code: def test_get_hook(self, mock_service, oss_key_sensor):
      oss_key_sensor.hook
      mock_service.assert_called_once_with(
          oss_conn_id=MOCK_OSS_CONN_ID, region=MOCK_REGION
      )
  
file_path: airflow/tests/providers/alibaba/cloud/sensors/test_oss_key.py
imports: from __future__ import annotations
  from unittest import mock
  from unittest.mock import PropertyMock
  import pytest
  from airflow.exceptions import AirflowException, AirflowSkipException
  from airflow.providers.alibaba.cloud.sensors.oss_key import OSSKeySensor
label_desc: Use image node_id 1 for calling the TestOSSKeySensor obj's underlying member method code with example usage: obj.test_get_hook(mock_service, oss_key_sensor) without return types