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During the migration the automated script to update the copyright headers accidentally got rid of some of the existing copyright lines. Reinstate them.
251 lines
9.1 KiB
Python
251 lines
9.1 KiB
Python
#
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# This file is licensed under the Affero General Public License (AGPL) version 3.
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#
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# Copyright 2021 The Matrix.org Foundation C.I.C.
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# Copyright (C) 2023 New Vector, Ltd
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#
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# This program is free software: you can redistribute it and/or modify
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# it under the terms of the GNU Affero General Public License as
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# published by the Free Software Foundation, either version 3 of the
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# License, or (at your option) any later version.
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#
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# See the GNU Affero General Public License for more details:
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# <https://www.gnu.org/licenses/agpl-3.0.html>.
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#
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# Originally licensed under the Apache License, Version 2.0:
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# <http://www.apache.org/licenses/LICENSE-2.0>.
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#
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# [This file includes modifications made by New Vector Limited]
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#
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#
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from typing import List, Tuple
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from prometheus_client import Gauge
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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 (
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BatchingQueue,
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number_in_flight,
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number_of_keys,
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number_queued,
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)
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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) -> None:
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self.clock, hs_clock = get_clock()
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# We ensure that we remove any existing metrics for "test_queue".
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try:
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number_queued.remove("test_queue")
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number_of_keys.remove("test_queue")
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number_in_flight.remove("test_queue")
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except KeyError:
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pass
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self._pending_calls: List[Tuple[List[str], defer.Deferred]] = []
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self.queue: BatchingQueue[str, str] = BatchingQueue(
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"test_queue", hs_clock, self._process_queue
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)
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async def _process_queue(self, values: List[str]) -> str:
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d: "defer.Deferred[str]" = 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 _get_sample_with_name(self, metric: Gauge, name: str) -> float:
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"""For a prometheus metric get the value of the sample that has a
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matching "name" label.
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"""
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for sample in next(iter(metric.collect())).samples:
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if sample.labels.get("name") == name:
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return sample.value
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self.fail("Found no matching sample")
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def _assert_metrics(self, queued: int, keys: int, in_flight: int) -> None:
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"""Assert that the metrics are correct"""
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sample = self._get_sample_with_name(number_queued, self.queue._name)
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self.assertEqual(
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sample,
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queued,
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"number_queued",
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)
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sample = self._get_sample_with_name(number_of_keys, self.queue._name)
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self.assertEqual(sample, keys, "number_of_keys")
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sample = self._get_sample_with_name(number_in_flight, self.queue._name)
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self.assertEqual(
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sample,
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in_flight,
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"number_in_flight",
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)
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def test_simple(self) -> None:
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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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self._assert_metrics(queued=1, keys=1, in_flight=1)
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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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self._assert_metrics(queued=0, keys=0, in_flight=1)
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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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self._assert_metrics(queued=0, keys=0, in_flight=0)
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def test_batching(self) -> None:
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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._assert_metrics(queued=2, keys=1, in_flight=2)
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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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self._assert_metrics(queued=0, keys=0, in_flight=2)
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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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self._assert_metrics(queued=0, keys=0, in_flight=0)
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def test_queuing(self) -> None:
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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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self.assertEqual(len(self._pending_calls), 1)
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# We queue up work after the process function has been called, testing
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# that they get correctly queued up.
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queue_d2 = defer.ensureDeferred(self.queue.add_to_queue("foo2"))
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queue_d3 = defer.ensureDeferred(self.queue.add_to_queue("foo3"))
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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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self.assertFalse(queue_d3.called)
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self._assert_metrics(queued=2, keys=1, in_flight=3)
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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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self.assertFalse(queue_d3.called)
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self._assert_metrics(queued=2, keys=1, in_flight=2)
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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", "foo3"])
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self.assertFalse(queue_d2.called)
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self.assertFalse(queue_d3.called)
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self._assert_metrics(queued=0, keys=0, in_flight=2)
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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.assertEqual(self.successResultOf(queue_d3), "bar2")
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self._assert_metrics(queued=0, keys=0, in_flight=0)
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def test_different_keys(self) -> None:
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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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self._assert_metrics(queued=1, keys=1, in_flight=3)
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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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self._assert_metrics(queued=1, keys=1, in_flight=2)
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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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self._assert_metrics(queued=0, keys=0, in_flight=1)
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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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self._assert_metrics(queued=0, keys=0, in_flight=0)
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