code: def test_execute(self, fetch_cluster_info_mock, file_mock, exec_mock):
      self.gke_op.execute(context=mock.MagicMock())
      fetch_cluster_info_mock.assert_called_once()
  
imports: from __future__ import annotations
  import json
  import os
  from unittest import mock
  import pytest
  from airflow.exceptions import AirflowException, TaskDeferred
  from airflow.models import Connection
  from airflow.providers.cncf.kubernetes.operators.pod import KubernetesPodOperator
  from airflow.providers.cncf.kubernetes.utils.pod_manager import OnFinishAction
  from airflow.providers.google.cloud.operators.kubernetes_engine import GKECreateClusterOperator, GKEDeleteClusterOperator, GKEStartPodOperator
  from airflow.providers.google.cloud.triggers.kubernetes_engine import GKEStartPodTrigger
label_desc: Use image node_id 3 for calling the TestGKEPodOperator obj's underlying member method code with example usage: obj.test_execute(fetch_cluster_info_mock, file_mock, exec_mock) without return types