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Change LRUCache to be tree-based so we can delete subtrees.

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This commit is contained in:
David Baker 2016-01-21 19:16:25 +00:00
parent 297eded261
commit f1f8122120
7 changed files with 140 additions and 52 deletions
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44
tests/util/test_lrucache.py
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@ -21,34 +21,34 @@ from synapse.util.caches.lrucache import LruCache
class LruCacheTestCase(unittest.TestCase):
def test_get_set(self):
cache = LruCache(1)
cache["key"] = "value"
self.assertEquals(cache.get("key"), "value")
self.assertEquals(cache["key"], "value")
cache = LruCache(1, 1)
cache[("key",)] = "value"
self.assertEquals(cache.get(("key",)), "value")
self.assertEquals(cache[("key",)], "value")
def test_eviction(self):
cache = LruCache(2)
cache[1] = 1
cache[2] = 2
cache = LruCache(2, 1)
cache[(1,)] = 1
cache[(2,)] = 2
self.assertEquals(cache.get(1), 1)
self.assertEquals(cache.get(2), 2)
self.assertEquals(cache.get((1,)), 1)
self.assertEquals(cache.get((2,)), 2)
cache[3] = 3
cache[(3,)] = 3
self.assertEquals(cache.get(1), None)
self.assertEquals(cache.get(2), 2)
self.assertEquals(cache.get(3), 3)
self.assertEquals(cache.get((1,)), None)
self.assertEquals(cache.get((2,)), 2)
self.assertEquals(cache.get((3,)), 3)
def test_setdefault(self):
cache = LruCache(1)
self.assertEquals(cache.setdefault("key", 1), 1)
self.assertEquals(cache.get("key"), 1)
self.assertEquals(cache.setdefault("key", 2), 1)
self.assertEquals(cache.get("key"), 1)
cache = LruCache(1, 1)
self.assertEquals(cache.setdefault(("key",), 1), 1)
self.assertEquals(cache.get(("key",)), 1)
self.assertEquals(cache.setdefault(("key",), 2), 1)
self.assertEquals(cache.get(("key",)), 1)
def test_pop(self):
cache = LruCache(1)
cache["key"] = 1
self.assertEquals(cache.pop("key"), 1)
self.assertEquals(cache.pop("key"), None)
cache = LruCache(1, 1)
cache[("key",)] = 1
self.assertEquals(cache.pop(("key",)), 1)
self.assertEquals(cache.pop(("key",)), None)