"""
flask_caching.backends.null
~~~~~~~~~~~~~~~~~~~~~~~~~~~

The null cache backend. A caching backend that doesn't cache.

:copyright: (c) 2018 by Peter Justin.
:copyright: (c) 2010 by Thadeus Burgess.
:license: BSD, see LICENSE for more details.
"""

from flask_caching.backends.base import BaseCache


class NullCache(BaseCache):
    """A cache that doesn't cache. This can be useful for unit testing.

    :param default_timeout: a dummy parameter that is ignored but exists
                            for API compatibility with other caches.
    """

    def has(self, key: str) -> bool:
        return False
