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import itertools
from dogpile.cache.api import NO_VALUE
from dogpile.testing import eq_
from dogpile.testing.fixtures import _GenericBackendFixture
class NullBackendTest(_GenericBackendFixture):
backend = "dogpile.cache.null"
def test_get(self):
reg = self._region()
eq_(reg.get("some key"), NO_VALUE)
def test_set(self):
reg = self._region()
reg.set("some key", "some value")
eq_(reg.get("some key"), NO_VALUE)
def test_delete(self):
reg = self._region()
reg.delete("some key")
eq_(reg.get("some key"), NO_VALUE)
def test_get_multi(self):
reg = self._region()
eq_(reg.get_multi(["a", "b", "c"]), [NO_VALUE, NO_VALUE, NO_VALUE])
def test_set_multi(self):
reg = self._region()
reg.set_multi({"a": 1, "b": 2, "c": 3})
eq_(reg.get_multi(["a", "b", "c"]), [NO_VALUE, NO_VALUE, NO_VALUE])
def test_delete_multi(self):
reg = self._region()
reg.delete_multi(["a", "b", "c"])
eq_(reg.get_multi(["a", "b", "c"]), [NO_VALUE, NO_VALUE, NO_VALUE])
def test_decorator(self):
reg = self._region()
counter = itertools.count(1)
@reg.cache_on_arguments()
def go(a, b):
val = next(counter)
return val, a, b
eq_(go(1, 2), (1, 1, 2))
eq_(go(1, 2), (2, 1, 2))
eq_(go(1, 3), (3, 1, 3))
def test_mutex(self):
backend = self._backend()
mutex = backend.get_mutex("foo")
ac = mutex.acquire()
assert ac
mutex.release()
ac2 = mutex.acquire(False)
assert ac2
mutex.release()
def test_mutex_doesnt_actually_lock(self):
backend = self._backend()
mutex = backend.get_mutex("foo")
ac = mutex.acquire()
assert ac
ac2 = mutex.acquire(False)
assert ac2
mutex.release()
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