code: def test_output_tty():
      with patch("sys.stdout.isatty", return_value=True):
          with pytest.raises(BadArgsError):
              vd.check_requested_output_file(make_opts(output_file="-"))
  
imports: from __future__ import annotations
  import logging
  import os
  from unittest.mock import patch
  import pikepdf
  import pytest
  from ocrmypdf import _validation
  from ocrmypdf._concurrent import NullProgressBar, SerialExecutor
  from ocrmypdf._exec.tesseract import TesseractVersion
  from ocrmypdf._plugin_manager import get_plugin_manager
  from ocrmypdf.api import create_options
  from ocrmypdf.cli import get_parser
  from ocrmypdf.exceptions import BadArgsError, MissingDependencyError
  from ocrmypdf.pdfinfo import PdfInfo
  from .conftest import run_ocrmypdf_api
label_desc: Use image node_id 9 for calling a global function with example usage: test_output_tty() without return types