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128 lines
4 KiB
Python
128 lines
4 KiB
Python
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# -*- coding: utf-8 -*-
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# Copyright 2019 The Matrix.org Foundation C.I.C.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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from synapse.util.retryutils import (
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MIN_RETRY_INTERVAL,
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RETRY_MULTIPLIER,
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NotRetryingDestination,
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get_retry_limiter,
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)
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from tests.unittest import HomeserverTestCase
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class RetryLimiterTestCase(HomeserverTestCase):
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def test_new_destination(self):
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"""A happy-path case with a new destination and a successful operation"""
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store = self.hs.get_datastore()
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d = get_retry_limiter("test_dest", self.clock, store)
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self.pump()
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limiter = self.successResultOf(d)
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# advance the clock a bit before making the request
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self.pump(1)
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with limiter:
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pass
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d = store.get_destination_retry_timings("test_dest")
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self.pump()
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new_timings = self.successResultOf(d)
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self.assertIsNone(new_timings)
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def test_limiter(self):
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"""General test case which walks through the process of a failing request"""
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store = self.hs.get_datastore()
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d = get_retry_limiter("test_dest", self.clock, store)
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self.pump()
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limiter = self.successResultOf(d)
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self.pump(1)
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try:
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with limiter:
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self.pump(1)
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failure_ts = self.clock.time_msec()
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raise AssertionError("argh")
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except AssertionError:
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pass
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# wait for the update to land
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self.pump()
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d = store.get_destination_retry_timings("test_dest")
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self.pump()
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new_timings = self.successResultOf(d)
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self.assertEqual(new_timings["failure_ts"], failure_ts)
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self.assertEqual(new_timings["retry_last_ts"], failure_ts)
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self.assertEqual(new_timings["retry_interval"], MIN_RETRY_INTERVAL)
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# now if we try again we should get a failure
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d = get_retry_limiter("test_dest", self.clock, store)
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self.pump()
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self.failureResultOf(d, NotRetryingDestination)
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#
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# advance the clock and try again
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#
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self.pump(MIN_RETRY_INTERVAL)
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d = get_retry_limiter("test_dest", self.clock, store)
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self.pump()
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limiter = self.successResultOf(d)
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self.pump(1)
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try:
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with limiter:
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self.pump(1)
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retry_ts = self.clock.time_msec()
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raise AssertionError("argh")
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except AssertionError:
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pass
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# wait for the update to land
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self.pump()
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d = store.get_destination_retry_timings("test_dest")
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self.pump()
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new_timings = self.successResultOf(d)
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self.assertEqual(new_timings["failure_ts"], failure_ts)
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self.assertEqual(new_timings["retry_last_ts"], retry_ts)
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self.assertGreaterEqual(
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new_timings["retry_interval"], MIN_RETRY_INTERVAL * RETRY_MULTIPLIER * 0.5
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)
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self.assertLessEqual(
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new_timings["retry_interval"], MIN_RETRY_INTERVAL * RETRY_MULTIPLIER * 2.0
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)
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#
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# one more go, with success
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#
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self.pump(MIN_RETRY_INTERVAL * RETRY_MULTIPLIER * 2.0)
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d = get_retry_limiter("test_dest", self.clock, store)
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self.pump()
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limiter = self.successResultOf(d)
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self.pump(1)
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with limiter:
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self.pump(1)
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# wait for the update to land
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self.pump()
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d = store.get_destination_retry_timings("test_dest")
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self.pump()
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new_timings = self.successResultOf(d)
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self.assertIsNone(new_timings)
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