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# 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 twisted.internet.defer import Deferred, ensureDeferred
from synapse.storage.background_updates import BackgroundUpdater
from tests import unittest
from tests.test_utils import make_awaitable, simple_async_mock
class BackgroundUpdateTestCase(unittest.HomeserverTestCase):
def prepare(self, reactor, clock, homeserver):
self.updates: BackgroundUpdater = self.hs.get_datastores().main.db_pool.updates
# the base test class should have run the real bg updates for us
self.assertTrue(
self.get_success(self.updates.has_completed_background_updates())
)
self.update_handler = Mock()
self.updates.register_background_update_handler(
"test_update", self.update_handler
)
def test_do_background_update(self):
# the time we claim it takes to update one item when running the update
duration_ms = 10
# the target runtime for each bg update
target_background_update_duration_ms = 100
store = self.hs.get_datastores().main
self.get_success(
store.db_pool.simple_insert(
"background_updates",
values={"update_name": "test_update", "progress_json": '{"my_key": 1}'},
)
)
# first step: make a bit of progress
async def update(progress, count):
await self.clock.sleep((count * duration_ms) / 1000)
progress = {"my_key": progress["my_key"] + 1}
await store.db_pool.runInteraction(
"update_progress",
self.updates._background_update_progress_txn,
"test_update",
progress,
)
return count
self.update_handler.side_effect = update
self.update_handler.reset_mock()
res = self.get_success(
self.updates.do_next_background_update(False),
by=0.01,
)
self.assertFalse(res)
# on the first call, we should get run with the default background update size
self.update_handler.assert_called_once_with(
{"my_key": 1}, self.updates.MINIMUM_BACKGROUND_BATCH_SIZE
)
# second step: complete the update
# we should now get run with a much bigger number of items to update
async def update(progress, count):
self.assertEqual(progress, {"my_key": 2})
self.assertAlmostEqual(
count,
target_background_update_duration_ms / duration_ms,
places=0,
)
await self.updates._end_background_update("test_update")
return count
self.update_handler.side_effect = update
self.update_handler.reset_mock()
result = self.get_success(self.updates.do_next_background_update(False))
self.assertFalse(result)
self.update_handler.assert_called_once()
# third step: we don't expect to be called any more
self.update_handler.reset_mock()
result = self.get_success(self.updates.do_next_background_update(False))
self.assertTrue(result)
self.assertFalse(self.update_handler.called)
class BackgroundUpdateControllerTestCase(unittest.HomeserverTestCase):
def prepare(self, reactor, clock, homeserver):
self.updates: BackgroundUpdater = self.hs.get_datastores().main.db_pool.updates
# the base test class should have run the real bg updates for us
self.assertTrue(
self.get_success(self.updates.has_completed_background_updates())
)
self.update_deferred = Deferred()
self.update_handler = Mock(return_value=self.update_deferred)
self.updates.register_background_update_handler(
"test_update", self.update_handler
)
# Mock out the AsyncContextManager
class MockCM:
__aenter__ = simple_async_mock(return_value=None)
__aexit__ = simple_async_mock(return_value=None)
self._update_ctx_manager = MockCM
# Mock out the `update_handler` callback
self._on_update = Mock(return_value=self._update_ctx_manager())
# Define a default batch size value that's not the same as the internal default
# value (100).
self._default_batch_size = 500
# Register the callbacks with more mocks
self.hs.get_module_api().register_background_update_controller_callbacks(
on_update=self._on_update,
min_batch_size=Mock(return_value=make_awaitable(self._default_batch_size)),
default_batch_size=Mock(
return_value=make_awaitable(self._default_batch_size),
),
)
def test_controller(self):
store = self.hs.get_datastores().main
self.get_success(
store.db_pool.simple_insert(
"background_updates",
values={"update_name": "test_update", "progress_json": "{}"},
)
)
# Set the return value for the context manager.
enter_defer = Deferred()
self._update_ctx_manager.__aenter__ = Mock(return_value=enter_defer)
# Start the background update.
do_update_d = ensureDeferred(self.updates.do_next_background_update(True))
self.pump()
# `run_update` should have been called, but the update handler won't be
# called until the `enter_defer` (returned by `__aenter__`) is resolved.
self._on_update.assert_called_once_with(
"test_update",
"master",
False,
)
self.assertFalse(do_update_d.called)
self.assertFalse(self.update_deferred.called)
# Resolving the `enter_defer` should call the update handler, which then
# blocks.
enter_defer.callback(100)
self.pump()
self.update_handler.assert_called_once_with({}, self._default_batch_size)
self.assertFalse(self.update_deferred.called)
self._update_ctx_manager.__aexit__.assert_not_called()
# Resolving the update handler deferred should cause the
# `do_next_background_update` to finish and return
self.update_deferred.callback(100)
self.pump()
self._update_ctx_manager.__aexit__.assert_called()
self.get_success(do_update_d)
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