code: def test_process_file_should_failure_callback(
      self, monkeypatch, tmp_path, get_test_dag
  ):
      callback_file = tmp_path.joinpath("callback.txt")
      callback_file.touch()
      monkeypatch.setenv("AIRFLOW_CALLBACK_FILE", str(callback_file))
      dag_file_processor = DagFileProcessor(
          dag_ids=[],
          dag_directory=TEST_DAGS_FOLDER,
          log=mock.MagicMock(),
      )
  
      dag = get_test_dag("test_on_failure_callback")
      task = dag.get_task(task_id="test_on_failure_callback_task")
      with create_session() as session:
          dagrun = dag.create_dagrun(
              state=State.RUNNING,
              execution_date=DEFAULT_DATE,
              run_type=DagRunType.SCHEDULED,
              session=session,
          )
          ti = dagrun.get_task_instance(task.task_id)
          ti.refresh_from_task(task)
  
          requests = [
              TaskCallbackRequest(
                  full_filepath=dag.fileloc,
                  simple_task_instance=SimpleTaskInstance.from_ti(ti),
                  msg="Message",
              )
          ]
          dag_file_processor.process_file(
              dag.fileloc, requests, session=session
          )
  
      ti.refresh_from_db()
      msg = (
          " ".join([str(k) for k in ti.key.primary]) + " fired callback"
      )
      assert msg in callback_file.read_text()
  
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 18 for calling the TestDagFileProcessor obj's underlying member method code with example usage: obj.test_process_file_should_failure_callback(monkeypatch, tmp_path, get_test_dag) without return types