def test_cache(self):
for backend in [
LocalBackend,
MemcacheBackend,
DatastoreBackend,
MemcacheCompareAndSetBackend,
LayeredBackend(LocalBackend, MemcacheBackend),
]:
memcache.flush_all()
LocalBackend.reset()
mutators = [0, 0, 0]
print "testing %s" % backend
@cache("cache-test-key", backend=backend)
def test_cached():
mutators[0] += 1
return mutators[0]
assert test_cached() == 1
assert test_cached() == 1
assert mutators[0] == 1
assert backend.get("cache-test-key") == 1
assert test_cached.uncached() == 2
assert test_cached.cached() == 1
test_cached.clear_cache()
assert test_cached() == 3
@cache("cache-test-key-none", backend=backend)
def test_cached_with_none():
mutators[1] += 1
return None
assert test_cached_with_none() is None
assert test_cached_with_none() is None
assert mutators[1] == 1
assert backend.get("cache-test-key-none") == none_sentinel_string
def test_cache(self):
for backend in [
LocalBackend, MemcacheBackend, MemcacheChunkedBackend,
MemcacheCompareAndSetBackend, DatastoreBackend,
DatastoreChunkedBackend,
LayeredBackend(LocalBackend, MemcacheBackend)
]:
memcache.flush_all()
LocalBackend.reset()
mutators = [0, 0, 0]
t0 = time.time()
print 'testing %s' % backend,
@cache('cache-test-key', backend=backend)
def test_cached():
mutators[0] += 1
return mutators[0]
# to see output of print statements, run with '--nocapture', e.g.
# nosetests --with-ferris --nocapture ferris/tests/test_caching.py
print "storage overhead ~", time.time() - t0
assert test_cached() == 1
assert test_cached() == 1
assert mutators[0] == 1
assert backend.get('cache-test-key') == 1
assert test_cached.uncached() == 2
assert test_cached.cached() == 1
test_cached.clear_cache()
assert test_cached() == 3
@cache('cache-test-key-none', backend=backend)
def test_cached_with_none():
mutators[1] += 1
return None
assert test_cached_with_none() is None
assert test_cached_with_none() is None
assert mutators[1] == 1
assert backend.get('cache-test-key-none') == none_sentinel_string
from random import choice
from string import ascii_lowercase
for backend in [MemcacheChunkedBackend, DatastoreChunkedBackend]:
memcache.flush_all()
print 'testing %s' % backend,
lis = list(ascii_lowercase)
bigobj = ''.join(
choice(lis) for _ in xrange(backend.chunksize * 2))
t0 = time.time()
@cache('cache-test-key-2', backend=backend)
def test_cached():
return bigobj
print "big obj. storage overhead ~", time.time() - t0
assert test_cached() == bigobj, "%s != %s" % (test_cached()[0:10],
bigobj[0:10])
assert test_cached() == bigobj
assert backend.get('cache-test-key-2') == bigobj