code: def test_execute_on_failure_callbacks_without_dag(
      self, mock_ti_handle_failure, has_serialized_dag
  ):
      dagbag = DagBag(
          dag_folder="/dev/null",
          include_examples=True,
          read_dags_from_db=False,
      )
      dag_file_processor = DagFileProcessor(
          dag_ids=[],
          dag_directory=TEST_DAGS_FOLDER,
          log=mock.MagicMock(),
      )
      with create_session() as session:
          session.query(TaskInstance).delete()
          dag = dagbag.get_dag("example_branch_operator")
          dagrun = dag.create_dagrun(
              state=State.RUNNING,
              execution_date=DEFAULT_DATE,
              run_type=DagRunType.SCHEDULED,
              session=session,
          )
          task = dag.get_task(task_id="run_this_first")
          ti = TaskInstance(
              task, run_id=dagrun.run_id, state=State.QUEUED
          )
          session.add(ti)
  
          if has_serialized_dag:
              assert (
                  SerializedDagModel.write_dag(dag, session=session)
                  is True
              )
              session.flush()
  
      requests = [
          TaskCallbackRequest(
              full_filepath="A",
              simple_task_instance=SimpleTaskInstance.from_ti(ti),
              msg="Message",
          )
      ]
      dag_file_processor.execute_callbacks_without_dag(
          requests, session
      )
      mock_ti_handle_failure.assert_called_once_with(
          error="Message",
          test_mode=conf.getboolean("core", "unit_test_mode"),
          session=session,
      )
  
imports: from __future__ import annotations
  import datetime
  import os
  from unittest import mock
  from unittest.mock import MagicMock, patch
  from zipfile import ZipFile
  import pytest
  from airflow import PY311, settings
  from airflow.callbacks.callback_requests import TaskCallbackRequest
  from airflow.configuration import TEST_DAGS_FOLDER, conf
  from airflow.dag_processing.manager import DagFileProcessorAgent
  from airflow.dag_processing.processor import DagFileProcessor, DagFileProcessorProcess
  from airflow.models import DagBag, DagModel, SlaMiss, TaskInstance, errors
  from airflow.models.serialized_dag import SerializedDagModel
  from airflow.models.taskinstance import SimpleTaskInstance
  from airflow.operators.empty import EmptyOperator
  from airflow.utils import timezone
  from airflow.utils.session import create_session
  from airflow.utils.state import State
  from airflow.utils.types import DagRunType
  from tests.test_utils.config import conf_vars, env_vars
  from tests.test_utils.db import clear_db_dags, clear_db_import_errors, clear_db_jobs, clear_db_pools, clear_db_runs, clear_db_serialized_dags, clear_db_sla_miss
  from tests.test_utils.mock_executor import MockExecutor
label_desc: Use image node_id 16 for calling the TestDagFileProcessor obj's underlying member method code with example usage: obj.test_execute_on_failure_callbacks_without_dag(mock_ti_handle_failure, has_serialized_dag) without return types