mirror of
https://mau.dev/maunium/synapse.git
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170 lines
6.2 KiB
Python
170 lines
6.2 KiB
Python
# Copyright 2021 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 twisted.internet import defer
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from synapse.logging.context import make_deferred_yieldable
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from synapse.util.batching_queue import BatchingQueue
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from tests.server import get_clock
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from tests.unittest import TestCase
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class BatchingQueueTestCase(TestCase):
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def setUp(self):
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self.clock, hs_clock = get_clock()
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self._pending_calls = []
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self.queue = BatchingQueue("test_queue", hs_clock, self._process_queue)
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async def _process_queue(self, values):
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d = defer.Deferred()
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self._pending_calls.append((values, d))
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return await make_deferred_yieldable(d)
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def test_simple(self):
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"""Tests the basic case of calling `add_to_queue` once and having
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`_process_queue` return.
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"""
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self.assertFalse(self._pending_calls)
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queue_d = defer.ensureDeferred(self.queue.add_to_queue("foo"))
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# The queue should wait a reactor tick before calling the processing
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# function.
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self.assertFalse(self._pending_calls)
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self.assertFalse(queue_d.called)
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# We should see a call to `_process_queue` after a reactor tick.
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self.clock.pump([0])
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self.assertEqual(len(self._pending_calls), 1)
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self.assertEqual(self._pending_calls[0][0], ["foo"])
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self.assertFalse(queue_d.called)
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# Return value of the `_process_queue` should be propagated back.
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self._pending_calls.pop()[1].callback("bar")
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self.assertEqual(self.successResultOf(queue_d), "bar")
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def test_batching(self):
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"""Test that multiple calls at the same time get batched up into one
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call to `_process_queue`.
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"""
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self.assertFalse(self._pending_calls)
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queue_d1 = defer.ensureDeferred(self.queue.add_to_queue("foo1"))
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queue_d2 = defer.ensureDeferred(self.queue.add_to_queue("foo2"))
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self.clock.pump([0])
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# We should see only *one* call to `_process_queue`
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self.assertEqual(len(self._pending_calls), 1)
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self.assertEqual(self._pending_calls[0][0], ["foo1", "foo2"])
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self.assertFalse(queue_d1.called)
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self.assertFalse(queue_d2.called)
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# Return value of the `_process_queue` should be propagated back to both.
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self._pending_calls.pop()[1].callback("bar")
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self.assertEqual(self.successResultOf(queue_d1), "bar")
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self.assertEqual(self.successResultOf(queue_d2), "bar")
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def test_queuing(self):
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"""Test that we queue up requests while a `_process_queue` is being
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called.
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"""
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self.assertFalse(self._pending_calls)
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queue_d1 = defer.ensureDeferred(self.queue.add_to_queue("foo1"))
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self.clock.pump([0])
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queue_d2 = defer.ensureDeferred(self.queue.add_to_queue("foo2"))
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# We should see only *one* call to `_process_queue`
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self.assertEqual(len(self._pending_calls), 1)
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self.assertEqual(self._pending_calls[0][0], ["foo1"])
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self.assertFalse(queue_d1.called)
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self.assertFalse(queue_d2.called)
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# Return value of the `_process_queue` should be propagated back to the
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# first.
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self._pending_calls.pop()[1].callback("bar1")
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self.assertEqual(self.successResultOf(queue_d1), "bar1")
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self.assertFalse(queue_d2.called)
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# We should now see a second call to `_process_queue`
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self.clock.pump([0])
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self.assertEqual(len(self._pending_calls), 1)
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self.assertEqual(self._pending_calls[0][0], ["foo2"])
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self.assertFalse(queue_d2.called)
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# Return value of the `_process_queue` should be propagated back to the
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# second.
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self._pending_calls.pop()[1].callback("bar2")
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self.assertEqual(self.successResultOf(queue_d2), "bar2")
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def test_different_keys(self):
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"""Test that calls to different keys get processed in parallel."""
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self.assertFalse(self._pending_calls)
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queue_d1 = defer.ensureDeferred(self.queue.add_to_queue("foo1", key=1))
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self.clock.pump([0])
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queue_d2 = defer.ensureDeferred(self.queue.add_to_queue("foo2", key=2))
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self.clock.pump([0])
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# We queue up another item with key=2 to check that we will keep taking
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# things off the queue.
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queue_d3 = defer.ensureDeferred(self.queue.add_to_queue("foo3", key=2))
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# We should see two calls to `_process_queue`
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self.assertEqual(len(self._pending_calls), 2)
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self.assertEqual(self._pending_calls[0][0], ["foo1"])
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self.assertEqual(self._pending_calls[1][0], ["foo2"])
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self.assertFalse(queue_d1.called)
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self.assertFalse(queue_d2.called)
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self.assertFalse(queue_d3.called)
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# Return value of the `_process_queue` should be propagated back to the
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# first.
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self._pending_calls.pop(0)[1].callback("bar1")
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self.assertEqual(self.successResultOf(queue_d1), "bar1")
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self.assertFalse(queue_d2.called)
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self.assertFalse(queue_d3.called)
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# Return value of the `_process_queue` should be propagated back to the
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# second.
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self._pending_calls.pop()[1].callback("bar2")
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self.assertEqual(self.successResultOf(queue_d2), "bar2")
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self.assertFalse(queue_d3.called)
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# We should now see a call `_pending_calls` for `foo3`
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self.clock.pump([0])
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self.assertEqual(len(self._pending_calls), 1)
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self.assertEqual(self._pending_calls[0][0], ["foo3"])
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self.assertFalse(queue_d3.called)
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# Return value of the `_process_queue` should be propagated back to the
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# third deferred.
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self._pending_calls.pop()[1].callback("bar4")
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self.assertEqual(self.successResultOf(queue_d3), "bar4")
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