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Diffstat (limited to 'tests/storage/test__base.py')
-rw-r--r-- | tests/storage/test__base.py | 199 |
1 files changed, 199 insertions, 0 deletions
diff --git a/tests/storage/test__base.py b/tests/storage/test__base.py new file mode 100644 index 00000000..e72cace8 --- /dev/null +++ b/tests/storage/test__base.py @@ -0,0 +1,199 @@ +# -*- coding: utf-8 -*- +# Copyright 2015 OpenMarket Ltd +# +# Licensed under the Apache License, Version 2.0 (the "License"); +# you may not use this file except in compliance with the License. +# You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, software +# distributed under the License is distributed on an "AS IS" BASIS, +# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. +# See the License for the specific language governing permissions and +# limitations under the License. + + +from tests import unittest +from twisted.internet import defer + +from synapse.util.async import ObservableDeferred + +from synapse.util.caches.descriptors import Cache, cached + + +class CacheTestCase(unittest.TestCase): + + def setUp(self): + self.cache = Cache("test") + + def test_empty(self): + failed = False + try: + self.cache.get("foo") + except KeyError: + failed = True + + self.assertTrue(failed) + + def test_hit(self): + self.cache.prefill("foo", 123) + + self.assertEquals(self.cache.get("foo"), 123) + + def test_invalidate(self): + self.cache.prefill(("foo",), 123) + self.cache.invalidate(("foo",)) + + failed = False + try: + self.cache.get(("foo",)) + except KeyError: + failed = True + + self.assertTrue(failed) + + def test_eviction(self): + cache = Cache("test", max_entries=2) + + cache.prefill(1, "one") + cache.prefill(2, "two") + cache.prefill(3, "three") # 1 will be evicted + + failed = False + try: + cache.get(1) + except KeyError: + failed = True + + self.assertTrue(failed) + + cache.get(2) + cache.get(3) + + def test_eviction_lru(self): + cache = Cache("test", max_entries=2, lru=True) + + cache.prefill(1, "one") + cache.prefill(2, "two") + + # Now access 1 again, thus causing 2 to be least-recently used + cache.get(1) + + cache.prefill(3, "three") + + failed = False + try: + cache.get(2) + except KeyError: + failed = True + + self.assertTrue(failed) + + cache.get(1) + cache.get(3) + + +class CacheDecoratorTestCase(unittest.TestCase): + + @defer.inlineCallbacks + def test_passthrough(self): + class A(object): + @cached() + def func(self, key): + return key + + a = A() + + self.assertEquals((yield a.func("foo")), "foo") + self.assertEquals((yield a.func("bar")), "bar") + + @defer.inlineCallbacks + def test_hit(self): + callcount = [0] + + class A(object): + @cached() + def func(self, key): + callcount[0] += 1 + return key + + a = A() + yield a.func("foo") + + self.assertEquals(callcount[0], 1) + + self.assertEquals((yield a.func("foo")), "foo") + self.assertEquals(callcount[0], 1) + + @defer.inlineCallbacks + def test_invalidate(self): + callcount = [0] + + class A(object): + @cached() + def func(self, key): + callcount[0] += 1 + return key + + a = A() + yield a.func("foo") + + self.assertEquals(callcount[0], 1) + + a.func.invalidate(("foo",)) + + yield a.func("foo") + + self.assertEquals(callcount[0], 2) + + def test_invalidate_missing(self): + class A(object): + @cached() + def func(self, key): + return key + + A().func.invalidate(("what",)) + + @defer.inlineCallbacks + def test_max_entries(self): + callcount = [0] + + class A(object): + @cached(max_entries=10) + def func(self, key): + callcount[0] += 1 + return key + + a = A() + + for k in range(0, 12): + yield a.func(k) + + self.assertEquals(callcount[0], 12) + + # There must have been at least 2 evictions, meaning if we calculate + # all 12 values again, we must get called at least 2 more times + for k in range(0,12): + yield a.func(k) + + self.assertTrue(callcount[0] >= 14, + msg="Expected callcount >= 14, got %d" % (callcount[0])) + + def test_prefill(self): + callcount = [0] + + d = defer.succeed(123) + + class A(object): + @cached() + def func(self, key): + callcount[0] += 1 + return d + + a = A() + + a.func.prefill(("foo",), ObservableDeferred(d)) + + self.assertEquals(a.func("foo").result, d.result) + self.assertEquals(callcount[0], 0) |