code: def test_execute(self, mock_hook):
      operator = PubSubCreateSubscriptionOperator(
          task_id=TASK_ID,
          project_id=TEST_PROJECT,
          topic=TEST_TOPIC,
          subscription=TEST_SUBSCRIPTION,
      )
      mock_hook.return_value.create_subscription.return_value = (
          TEST_SUBSCRIPTION
      )
      context = mock.MagicMock()
      response = operator.execute(context=context)
      mock_hook.return_value.create_subscription.assert_called_once_with(
          project_id=TEST_PROJECT,
          topic=TEST_TOPIC,
          subscription=TEST_SUBSCRIPTION,
          subscription_project_id=None,
          ack_deadline_secs=10,
          fail_if_exists=False,
          push_config=None,
          retain_acked_messages=None,
          message_retention_duration=None,
          labels=None,
          enable_message_ordering=False,
          expiration_policy=None,
          filter_=None,
          dead_letter_policy=None,
          retry_policy=None,
          retry=DEFAULT,
          timeout=None,
          metadata=(),
      )
      assert response == TEST_SUBSCRIPTION
  
imports: from __future__ import annotations
  from typing import Any
  from unittest import mock
  from google.api_core.gapic_v1.method import DEFAULT
  from google.cloud.pubsub_v1.types import ReceivedMessage
  from airflow.providers.google.cloud.operators.pubsub import PubSubCreateSubscriptionOperator, PubSubCreateTopicOperator, PubSubDeleteSubscriptionOperator, PubSubDeleteTopicOperator, PubSubPublishMessageOperator, PubSubPullOperator
label_desc: Use image node_id 1 for calling the TestPubSubSubscriptionCreateOperator obj's underlying member method code with example usage: obj.test_execute(mock_hook) without return types