798 def get_test_info_cache_path(test_reference, cache_root=None):  argument
808   if not cache_root:
809     cache_root = get_cache_root()
810   return os.path.join(cache_root, _get_hashed_file_name(test_reference))
813 def update_test_info_cache(test_reference, test_infos, cache_root=None):  argument
823   if not cache_root:
824     cache_root = get_cache_root()
825   if not os.path.isdir(cache_root):
826     os.makedirs(cache_root)
827   cache_path = get_test_info_cache_path(test_reference, cache_root)
840 def load_test_info_cache(test_reference, cache_root=None):  argument
850   if not cache_root:
851     cache_root = get_cache_root()
853   cache_file = get_test_info_cache_path(test_reference, cache_root)
877 def clean_test_info_caches(tests, cache_root=None):  argument
884   if not cache_root:
885     cache_root = get_cache_root()
887     cache_file = get_test_info_cache_path(test, cache_root)