def test_ttl(self):
cache = caches.DequeOutTTLCache(2, ttl=1, timer=_Timer())
expect(cache.timer()).to(equal(0))
expect(cache.ttl).to(equal(1))
cache[1] = 1
expect(set(cache)).to(equal({1}))
expect(len(cache)).to(equal(1))
expect(cache[1]).to(equal(1))
cache.timer.tick()
expect(set(cache)).to(equal({1}))
expect(len(cache)).to(equal(1))
expect(cache[1]).to(equal(1))
cache[2] = 2
expect(set(cache)).to(equal({1, 2}))
expect(len(cache)).to(equal(2))
expect(cache[1]).to(equal(1))
expect(cache[2]).to(equal(2))
cache.timer.tick()
expect(set(cache)).to(equal({2}))
expect(len(cache)).to(equal(1))
expect(cache[2]).to(equal(2))
expect(cache.get(1)).to(be_none)
def test_lru(self):
lru_limit = 2
expiry = 100
cache = caches.DequeOutTTLCache(lru_limit, expiry)
cache[1] = 1
cache[2] = 2
cache[3] = 3
expect(len(cache)).to(equal(2))
expect(cache[2]).to(equal(2))
expect(cache[3]).to(equal(3))
expect(cache.get(1)).to(be_none)
expect(len(cache.out_deque)).to(be(1))
cache[4] = 4
expect(cache.get(2)).to(be_none)
expect(len(cache.out_deque)).to(be(2))
def test_constructor_should_accept_deques(self):
a_deque = collections.deque()
c = caches.DequeOutTTLCache(3, 3, out_deque=a_deque)
expect(c.out_deque).to(be(a_deque))
def test_constructor_should_fail_on_bad_deques(self):
testf = lambda: caches.DequeOutTTLCache(_TEST_NUM_ENTRIES, _TEST_TTL,
out_deque=object())
expect(testf).to(raise_error(ValueError))
def test_constructor_should_set_up_a_default_deque(self):
c = caches.DequeOutTTLCache(_TEST_NUM_ENTRIES, _TEST_TTL)
expect(c.out_deque).to(be_a(collections.deque))