Disable cache decorator for testing for dogpile.cache

Question

I recently switched from beaker to dogpile.cache. It works very well in live code but I am running into an issue with testing. How do I disable the caching for testing?

I am currently using

#caching.py
from dogpile.cache import make_region

region = make_region().configure(
    'dogpile.cache.redis',
    expiration_time = 3600,
    arguments = {
        'host': '127.0.0.1',
        'port': 6379
    }
)

#db.py
from .caching import region

@region.cache_on_arguments()
def fetch_from_db(item):
    return some_database.lookup(item)

How do I swap out the caching or disable it for unittests?

In case anyone was wondering, I didn't have enough points for a dogpile.cache tag. — sasker, Nov 05 '13 at 19:07

score 7 · Answer 1 · answered Oct 29 '14 at 08:58

7

During testing configure dogpile to use a NullBackend, which is an example of the Null Object design pattern.

from dogpile.cache import make_region

region = make_region().configure(
    'dogpile.cache.null'
)

answered Oct 29 '14 at 08:58

Jon

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score 0 · Answer 2 · answered Nov 05 '13 at 19:53

Redefine your decorator into an identity function.

I.e.

if __debug__:
    def dont_cache():
        def noop(f):
            return f
        return noop
    class Nothing:
        pass
    region = Nothing()
    region.cache_on_arguments = dont_cache
else:
    from .caching import region

Disable cache decorator for testing for dogpile.cache

2 Answers2