docstr: Directory to scan does not exist raises CacheNotFound.
docstr_tok: ["Directory","to","scan","does","not","exist","raises","CacheNotFound","."]
code: def test_cache_dir_is_missing(self) -> None:
      """Directory to scan does not exist raises CacheNotFound."""
      self.assertRaises(
          CacheNotFound,
          scan_cache_dir,
          self.cache_dir / "does_not_exist",
      )
  
imports: import os
  import tempfile
  import time
  import unittest
  from pathlib import Path
  from unittest.mock import Mock
  import pytest
  from huggingface_hub._snapshot_download import snapshot_download
  from huggingface_hub.commands.scan_cache import ScanCacheCommand
  from huggingface_hub.utils import DeleteCacheStrategy, HFCacheInfo, capture_output, scan_cache_dir
  from huggingface_hub.utils._cache_manager import CacheNotFound, _format_size, _format_timesince, _try_delete_path
  from .testing_constants import TOKEN
  from .testing_utils import rmtree_with_retry, with_production_testing, xfail_on_windows
label_desc: Use image node_id 1 for calling the TestMissingCacheUtils obj's underlying member method code with example usage: obj.test_cache_dir_is_missing() without return types