def ondisk(cls, **kwargs):
"""@cached backed by an on-disk sqlite3-based cache."""
from dwave.cloud.config import get_cache_dir
directory = kwargs.pop('directory', get_cache_dir())
# NOTE: use pickle v4 to support <py38
# TODO: consider using `diskcache.JSONDisk` if we can serialize `api.models`
cache = diskcache.Cache(directory=directory, disk_pickle_protocol=4)
return cls(cache=cache, **kwargs)
def test_cache_dir(self):
path = get_cache_dir()
self.assertTrue(os.path.isdir(path))
self.assertIn(__packagename__, path)
self.assertIn(__version__, path)