code: def test_sync_up_if_needed(temp_data_dirs, tmp_path):
      """Check that we only sync up again after sync period"""
      tmp_source, tmp_target = temp_data_dirs
  
      with freeze_time() as frozen:
          syncer = _FilesystemSyncer(
              storage_filesystem=_create_mock_custom_fs(tmp_path),
              sync_period=60,
          )
  
          assert syncer.sync_up_if_needed(
              local_dir=tmp_source,
              remote_dir="/test/test_sync_up_not_needed",
          )
          syncer.wait()
  
          frozen.tick(30)
  
          # Sync period not over, yet
          assert not syncer.sync_up_if_needed(
              local_dir=tmp_source,
              remote_dir="/test/test_sync_up_not_needed",
          )
  
          frozen.tick(30)
  
          # Sync period over, sync again
          assert syncer.sync_up_if_needed(
              local_dir=tmp_source,
              remote_dir="/test/test_sync_up_not_needed",
          )
  
imports: import logging
  import os
  import time
  from typing import List, Optional
  from freezegun import freeze_time
  import pytest
  import ray
  import ray.cloudpickle
  from ray.train._internal.storage import _upload_to_fs_path, _download_from_fs_path, get_fs_and_path, _FilesystemSyncer
  from ray.train._internal.syncer import _BackgroundProcess
  from ray.train.tests.test_new_persistence import _create_mock_custom_fs
label_desc: Use image node_id 10 for calling a global function with example usage: test_sync_up_if_needed(temp_data_dirs, tmp_path) without return types