mirror of
https://mau.dev/maunium/synapse.git
synced 2024-05-23 14:03:45 +02:00
c3e38b88f2
This adds some opentracing annotations to ResponseCache, to make it easier to see what's going on; in particular, it adds a link back to the initial trace which is actually doing the work of generating the response.
216 lines
7.2 KiB
Python
216 lines
7.2 KiB
Python
# Copyright 2021 The Matrix.org Foundation C.I.C.
|
|
#
|
|
# 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 unittest.mock import Mock
|
|
|
|
from parameterized import parameterized
|
|
|
|
from twisted.internet import defer
|
|
|
|
from synapse.util.caches.response_cache import ResponseCache, ResponseCacheContext
|
|
|
|
from tests.server import get_clock
|
|
from tests.unittest import TestCase
|
|
|
|
|
|
class ResponseCacheTestCase(TestCase):
|
|
"""
|
|
A TestCase class for ResponseCache.
|
|
|
|
The test-case function naming has some logic to it in it's parts, here's some notes about it:
|
|
wait: Denotes tests that have an element of "waiting" before its wrapped result becomes available
|
|
(Generally these just use .delayed_return instead of .instant_return in it's wrapped call.)
|
|
expire: Denotes tests that test expiry after assured existence.
|
|
(These have cache with a short timeout_ms=, shorter than will be tested through advancing the clock)
|
|
"""
|
|
|
|
def setUp(self):
|
|
self.reactor, self.clock = get_clock()
|
|
|
|
def with_cache(self, name: str, ms: int = 0) -> ResponseCache:
|
|
return ResponseCache(self.clock, name, timeout_ms=ms)
|
|
|
|
@staticmethod
|
|
async def instant_return(o: str) -> str:
|
|
return o
|
|
|
|
async def delayed_return(self, o: str) -> str:
|
|
await self.clock.sleep(1)
|
|
return o
|
|
|
|
def test_cache_hit(self):
|
|
cache = self.with_cache("keeping_cache", ms=9001)
|
|
|
|
expected_result = "howdy"
|
|
|
|
wrap_d = defer.ensureDeferred(
|
|
cache.wrap(0, self.instant_return, expected_result)
|
|
)
|
|
|
|
self.assertEqual(
|
|
expected_result,
|
|
self.successResultOf(wrap_d),
|
|
"initial wrap result should be the same",
|
|
)
|
|
|
|
# a second call should return the result without a call to the wrapped function
|
|
unexpected = Mock(spec=())
|
|
wrap2_d = defer.ensureDeferred(cache.wrap(0, unexpected))
|
|
unexpected.assert_not_called()
|
|
self.assertEqual(
|
|
expected_result,
|
|
self.successResultOf(wrap2_d),
|
|
"cache should still have the result",
|
|
)
|
|
|
|
def test_cache_miss(self):
|
|
cache = self.with_cache("trashing_cache", ms=0)
|
|
|
|
expected_result = "howdy"
|
|
|
|
wrap_d = defer.ensureDeferred(
|
|
cache.wrap(0, self.instant_return, expected_result)
|
|
)
|
|
|
|
self.assertEqual(
|
|
expected_result,
|
|
self.successResultOf(wrap_d),
|
|
"initial wrap result should be the same",
|
|
)
|
|
self.assertCountEqual([], cache.keys(), "cache should not have the result now")
|
|
|
|
def test_cache_expire(self):
|
|
cache = self.with_cache("short_cache", ms=1000)
|
|
|
|
expected_result = "howdy"
|
|
|
|
wrap_d = defer.ensureDeferred(
|
|
cache.wrap(0, self.instant_return, expected_result)
|
|
)
|
|
|
|
self.assertEqual(expected_result, self.successResultOf(wrap_d))
|
|
|
|
# a second call should return the result without a call to the wrapped function
|
|
unexpected = Mock(spec=())
|
|
wrap2_d = defer.ensureDeferred(cache.wrap(0, unexpected))
|
|
unexpected.assert_not_called()
|
|
self.assertEqual(
|
|
expected_result,
|
|
self.successResultOf(wrap2_d),
|
|
"cache should still have the result",
|
|
)
|
|
|
|
# cache eviction timer is handled
|
|
self.reactor.pump((2,))
|
|
self.assertCountEqual([], cache.keys(), "cache should not have the result now")
|
|
|
|
def test_cache_wait_hit(self):
|
|
cache = self.with_cache("neutral_cache")
|
|
|
|
expected_result = "howdy"
|
|
|
|
wrap_d = defer.ensureDeferred(
|
|
cache.wrap(0, self.delayed_return, expected_result)
|
|
)
|
|
|
|
self.assertNoResult(wrap_d)
|
|
|
|
# function wakes up, returns result
|
|
self.reactor.pump((2,))
|
|
|
|
self.assertEqual(expected_result, self.successResultOf(wrap_d))
|
|
|
|
def test_cache_wait_expire(self):
|
|
cache = self.with_cache("medium_cache", ms=3000)
|
|
|
|
expected_result = "howdy"
|
|
|
|
wrap_d = defer.ensureDeferred(
|
|
cache.wrap(0, self.delayed_return, expected_result)
|
|
)
|
|
self.assertNoResult(wrap_d)
|
|
|
|
# stop at 1 second to callback cache eviction callLater at that time, then another to set time at 2
|
|
self.reactor.pump((1, 1))
|
|
|
|
self.assertEqual(expected_result, self.successResultOf(wrap_d))
|
|
|
|
# a second call should immediately return the result without a call to the
|
|
# wrapped function
|
|
unexpected = Mock(spec=())
|
|
wrap2_d = defer.ensureDeferred(cache.wrap(0, unexpected))
|
|
unexpected.assert_not_called()
|
|
self.assertEqual(
|
|
expected_result,
|
|
self.successResultOf(wrap2_d),
|
|
"cache should still have the result",
|
|
)
|
|
|
|
# (1 + 1 + 2) > 3.0, cache eviction timer is handled
|
|
self.reactor.pump((2,))
|
|
self.assertCountEqual([], cache.keys(), "cache should not have the result now")
|
|
|
|
@parameterized.expand([(True,), (False,)])
|
|
def test_cache_context_nocache(self, should_cache: bool):
|
|
"""If the callback clears the should_cache bit, the result should not be cached"""
|
|
cache = self.with_cache("medium_cache", ms=3000)
|
|
|
|
expected_result = "howdy"
|
|
|
|
call_count = 0
|
|
|
|
async def non_caching(o: str, cache_context: ResponseCacheContext[int]):
|
|
nonlocal call_count
|
|
call_count += 1
|
|
await self.clock.sleep(1)
|
|
cache_context.should_cache = should_cache
|
|
return o
|
|
|
|
wrap_d = defer.ensureDeferred(
|
|
cache.wrap(0, non_caching, expected_result, cache_context=True)
|
|
)
|
|
# there should be no result to start with
|
|
self.assertNoResult(wrap_d)
|
|
|
|
# a second call should also return a pending deferred
|
|
wrap2_d = defer.ensureDeferred(
|
|
cache.wrap(0, non_caching, expected_result, cache_context=True)
|
|
)
|
|
self.assertNoResult(wrap2_d)
|
|
|
|
# and there should have been exactly one call
|
|
self.assertEqual(call_count, 1)
|
|
|
|
# let the call complete
|
|
self.reactor.advance(1)
|
|
|
|
# both results should have completed
|
|
self.assertEqual(expected_result, self.successResultOf(wrap_d))
|
|
self.assertEqual(expected_result, self.successResultOf(wrap2_d))
|
|
|
|
if should_cache:
|
|
unexpected = Mock(spec=())
|
|
wrap3_d = defer.ensureDeferred(cache.wrap(0, unexpected))
|
|
unexpected.assert_not_called()
|
|
self.assertEqual(
|
|
expected_result,
|
|
self.successResultOf(wrap3_d),
|
|
"cache should still have the result",
|
|
)
|
|
|
|
else:
|
|
self.assertCountEqual(
|
|
[], cache.keys(), "cache should not have the result now"
|
|
)
|