def test_max_items(self):
cache = Cache(10)
self.failUnlessEqual(cache.num_items(),0,"number of items: "+`cache.num_items()`)
for i in range(10):
item = CacheItem(i,i, sec(1), sec(2), sec(3))
cache.add_item(item)
self.failUnlessEqual(cache.num_items(),10,"number of items: "+`cache.num_items()`)
for i in range(10,30):
item = CacheItem(i,i, sec(1), sec(2), sec(3))
cache.add_item(item)
self.failUnless(cache.num_items() > 7,"number of items: "+`cache.num_items()`)
self.failUnless(cache.num_items() <= 10,"number of items: "+`cache.num_items()`)
self.failUnlessEqual(cache.num_items(),len(cache._items),
"number of items: %r, in dict: %r" % (cache.num_items(), cache._items))
def test_item_expiration(self):
cache = Cache(100)
item = CacheItem("test_addr","test_value", sec(0.1), sec(0.2), sec(0.3))
cache.add_item(item)
gitem = cache.get_item("test_addr","fresh")
self.failUnlessEqual(gitem,item)
sleep(0.01)
gitem = cache.get_item("test_addr","fresh")
self.failUnlessEqual(gitem,item)
sleep(0.1)
gitem = cache.get_item("test_addr","fresh")
self.failUnlessEqual(gitem,None)
cache.tick()
gitem = cache.get_item("test_addr","old")
self.failUnlessEqual(gitem,item)
sleep(0.3)
cache.tick()
gitem = cache.get_item("test_addr","stale")
self.failUnlessEqual(gitem,None)
self.failUnlessEqual(cache.num_items(),0,"number of items: "+`cache.num_items()`)
def test_add_get_item(self):
cache = Cache(100)
item1 = CacheItem("test_addr1","test_value1", sec(1), sec(2), sec(3))
cache.add_item(item1)
item2 = CacheItem("test_addr2","test_value2", sec(1), sec(2), sec(3))
cache.add_item(item2)
item3 = CacheItem("test_addr3","test_value3", sec(1), sec(2), sec(3))
cache.add_item(item3)
gitem2 = cache.get_item("test_addr2","fresh")
self.failUnless(gitem2 is item2, "gitem2=%r item2=%r" % (gitem2, item2))
gitem1 = cache.get_item("test_addr1","old")
self.failUnless(gitem1 is item1, "gitem2=%r item2=%r" % (gitem2, item2))
gitem3 = cache.get_item("test_addr3","stale")
self.failUnless(gitem3 is item3, "gitem2=%r item2=%r" % (gitem2, item2))
gitem1 = cache.get_item("test_addr1","new")
self.failUnless(gitem1 is None, "gitem1=%r" % (gitem1,))
