code: def test_instance_db_patch_should_throw_ex_if_not_exists(
      self, mock_hook, _check_if_db_exists
  ):
      _check_if_db_exists.return_value = False
      with pytest.raises(AirflowException) as ctx:
          op = CloudSQLPatchInstanceDatabaseOperator(
              project_id=PROJECT_ID,
              instance=INSTANCE_NAME,
              database=DB_NAME,
              body=DATABASE_PATCH_BODY,
              task_id="id",
          )
          op.execute(None)
      err = ctx.value
      assert "Cloud SQL instance with ID" in str(err)
      assert "does not contain database" in str(err)
      mock_hook.assert_called_once_with(
          api_version="v1beta4",
          gcp_conn_id="google_cloud_default",
          impersonation_chain=None,
      )
      mock_hook.return_value.patch_database.assert_not_called()
  
imports: from __future__ import annotations
  import os
  from unittest import mock
  import pytest
  from airflow.exceptions import AirflowException, TaskDeferred
  from airflow.models import Connection
  from airflow.providers.google.cloud.operators.cloud_sql import CloudSQLCloneInstanceOperator, CloudSQLCreateInstanceDatabaseOperator, CloudSQLCreateInstanceOperator, CloudSQLDeleteInstanceDatabaseOperator, CloudSQLDeleteInstanceOperator, CloudSQLExecuteQueryOperator, CloudSQLExportInstanceOperator, CloudSQLImportInstanceOperator, CloudSQLInstancePatchOperator, CloudSQLPatchInstanceDatabaseOperator
  from airflow.providers.google.cloud.triggers.cloud_sql import CloudSQLExportTrigger
  from airflow.providers.google.common.consts import GOOGLE_DEFAULT_DEFERRABLE_METHOD_NAME
label_desc: Use image node_id 21 for calling the TestCloudSql obj's underlying member method code with example usage: obj.test_instance_db_patch_should_throw_ex_if_not_exists(mock_hook, _check_if_db_exists) without return types