code: def test_persist_artifacts_failures(storage: StorageContext):
      """Tests `StorageContext.persist_artifacts` edge cases (empty directory)."""
      if not storage.syncer:
          # Should be a no-op if storage_path == storage_local_path (no syncing needed)
          storage.persist_artifacts()
          return
  
      # Uploading before the trial directory has been created should fail
      with pytest.raises(FileNotFoundError):
          storage.persist_artifacts()
          if storage.syncer:
              storage.syncer.wait()
  
      with pytest.raises(FileNotFoundError):
          storage.persist_artifacts(force=True)
  
file_path: ray/python/ray/train/tests/test_storage.py
imports: import os
  from pathlib import Path
  import pyarrow.fs
  import pytest
  import ray.cloudpickle
  from ray.train import Checkpoint, SyncConfig
  from ray.train._internal.storage import _VALIDATE_STORAGE_MARKER_FILENAME, StorageContext, _list_at_fs_path
  from ray.train.tests.test_new_persistence import _resolve_storage_type
label_desc: Use image node_id 9 for calling a global function with example usage: test_persist_artifacts_failures(storage) without return types