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# Copyright 2017 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 typing import List, cast
from synapse.util import Clock
from synapse.util.caches.expiringcache import ExpiringCache
from tests.utils import MockClock
from .. import unittest
class ExpiringCacheTestCase(unittest.HomeserverTestCase):
def test_get_set(self) -> None:
clock = MockClock()
cache: ExpiringCache[str, str] = ExpiringCache(
"test", cast(Clock, clock), max_len=1
)
cache["key"] = "value"
self.assertEqual(cache.get("key"), "value")
self.assertEqual(cache["key"], "value")
def test_eviction(self) -> None:
clock = MockClock()
cache: ExpiringCache[str, str] = ExpiringCache(
"test", cast(Clock, clock), max_len=2
)
cache["key"] = "value"
cache["key2"] = "value2"
self.assertEqual(cache.get("key"), "value")
self.assertEqual(cache.get("key2"), "value2")
cache["key3"] = "value3"
self.assertEqual(cache.get("key"), None)
self.assertEqual(cache.get("key2"), "value2")
self.assertEqual(cache.get("key3"), "value3")
def test_iterable_eviction(self) -> None:
clock = MockClock()
cache: ExpiringCache[str, List[int]] = ExpiringCache(
"test", cast(Clock, clock), max_len=5, iterable=True
)
cache["key"] = [1]
cache["key2"] = [2, 3]
cache["key3"] = [4, 5]
self.assertEqual(cache.get("key"), [1])
self.assertEqual(cache.get("key2"), [2, 3])
self.assertEqual(cache.get("key3"), [4, 5])
cache["key4"] = [6, 7]
self.assertEqual(cache.get("key"), None)
self.assertEqual(cache.get("key2"), None)
self.assertEqual(cache.get("key3"), [4, 5])
self.assertEqual(cache.get("key4"), [6, 7])
def test_time_eviction(self) -> None:
clock = MockClock()
cache: ExpiringCache[str, int] = ExpiringCache(
"test", cast(Clock, clock), expiry_ms=1000
)
cache["key"] = 1
clock.advance_time(0.5)
cache["key2"] = 2
self.assertEqual(cache.get("key"), 1)
self.assertEqual(cache.get("key2"), 2)
clock.advance_time(0.9)
self.assertEqual(cache.get("key"), None)
self.assertEqual(cache.get("key2"), 2)
clock.advance_time(1)
self.assertEqual(cache.get("key"), None)
self.assertEqual(cache.get("key2"), None)
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