code: def test_dir_state_existing_empty_dir(
      self, mock_getmtime, mock_isdir
  ):
      mock_isdir.return_value = True
      dirpath = "/existing/empty/dir"
      mock_getmtime.return_value = 1000
      result = dir_state(dirpath)
      mock_isdir.assert_called_once_with(dirpath)
      mock_getmtime.assert_called_once_with(dirpath)
      self.assertEqual(result, 1000)
  
imports: import asyncio
  import os
  import shutil
  import tempfile
  import unittest
  import time
  from unittest.mock import patch
  from fiftyone.operators.decorators import coroutine_timeout, dir_state
label_desc: Use image node_id 2 for calling the DirStateTests obj's underlying member method code with example usage: obj.test_dir_state_existing_empty_dir(mock_getmtime, mock_isdir) without return types