code: def test_instance_delete_aborts_and_succeeds_if_instance_does_not_exist(
      self, mock_hook
  ):
      mock_hook.return_value.get_instance.return_value = None
      op = SpannerDeleteInstanceOperator(
          project_id=PROJECT_ID, instance_id=INSTANCE_ID, task_id="id"
      )
      result = op.execute(None)
      mock_hook.assert_called_once_with(
          gcp_conn_id="google_cloud_default",
          impersonation_chain=None,
      )
      mock_hook.return_value.delete_instance.assert_not_called()
      assert result
  
imports: from __future__ import annotations
  from unittest import mock
  import pytest
  from airflow.exceptions import AirflowException
  from airflow.providers.google.cloud.operators.spanner import SpannerDeleteDatabaseInstanceOperator, SpannerDeleteInstanceOperator, SpannerDeployDatabaseInstanceOperator, SpannerDeployInstanceOperator, SpannerQueryDatabaseInstanceOperator, SpannerUpdateDatabaseInstanceOperator
label_desc: Use image node_id 9 for calling the TestCloudSpanner obj's underlying member method code with example usage: obj.test_instance_delete_aborts_and_succeeds_if_instance_does_not_exist(mock_hook) without return types