code: def test_file_task_handler_when_ti_value_is_invalid(self):
      def task_callable(ti):
          ti.log.info("test")
  
      dag = DAG(
          "dag_for_testing_file_task_handler", start_date=DEFAULT_DATE
      )
      dagrun = dag.create_dagrun(
          run_type=DagRunType.MANUAL,
          state=State.RUNNING,
          execution_date=DEFAULT_DATE,
      )
      task = PythonOperator(
          task_id="task_for_testing_file_log_handler",
          dag=dag,
          python_callable=task_callable,
      )
      ti = TaskInstance(task=task, run_id=dagrun.run_id)
  
      logger = ti.log
      ti.log.disabled = False
  
      file_handler = next(
          (
              handler
              for handler in logger.handlers
              if handler.name == FILE_TASK_HANDLER
          ),
          None,
      )
      assert file_handler is not None
  
      set_context(logger, ti)
      assert file_handler.handler is not None
      # We expect set_context generates a file locally.
      log_filename = file_handler.handler.baseFilename
      assert os.path.isfile(log_filename)
      assert log_filename.endswith("1.log"), log_filename
  
      ti.run(ignore_ti_state=True)
  
      file_handler.flush()
      file_handler.close()
  
      assert hasattr(file_handler, "read")
      # Return value of read must be a tuple of list and list.
      # passing invalid `try_number` to read function
      logs, metadatas = file_handler.read(ti, 0)
      assert isinstance(logs, list)
      assert isinstance(metadatas, list)
      assert len(logs) == 1
      assert len(logs) == len(metadatas)
      assert isinstance(metadatas[0], dict)
      assert logs[0][0][0] == "default_host"
      assert (
          logs[0][0][1]
          == "Error fetching the logs. Try number 0 is invalid."
      )
  
      # Remove the generated tmp log file.
      os.remove(log_filename)
  
imports: from __future__ import annotations
  import logging
  import logging.config
  import os
  import re
  from pathlib import Path
  from unittest import mock
  from unittest.mock import patch
  import pendulum
  import pytest
  from kubernetes.client import models
  from airflow.config_templates.airflow_local_settings import DEFAULT_LOGGING_CONFIG
  from airflow.jobs.job import Job
  from airflow.jobs.triggerer_job_runner import TriggererJobRunner
  from airflow.models.dag import DAG
  from airflow.models.dagrun import DagRun
  from airflow.models.taskinstance import TaskInstance
  from airflow.models.trigger import Trigger
  from airflow.operators.python import PythonOperator
  from airflow.utils.log.file_task_handler import FileTaskHandler, LogType, _interleave_logs, _parse_timestamps_in_log_file
  from airflow.utils.log.logging_mixin import set_context
  from airflow.utils.net import get_hostname
  from airflow.utils.session import create_session
  from airflow.utils.state import State, TaskInstanceState
  from airflow.utils.timezone import datetime
  from airflow.utils.types import DagRunType
  from tests.test_utils.config import conf_vars
label_desc: Use image node_id 5 for calling the TestFileTaskLogHandler obj's underlying member method code with example usage: obj.test_file_task_handler_when_ti_value_is_invalid() without return types