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from mock import Mock
from twisted.internet import defer
from tests import unittest
from tests.utils import setup_test_homeserver
class BackgroundUpdateTestCase(unittest.TestCase):
@defer.inlineCallbacks
def setUp(self):
hs = yield setup_test_homeserver(self.addCleanup)
self.store = hs.get_datastore()
self.clock = hs.get_clock()
self.update_handler = Mock()
yield self.store.db.updates.register_background_update_handler(
"test_update", self.update_handler
)
# run the real background updates, to get them out the way
# (perhaps we should run them as part of the test HS setup, since we
# run all of the other schema setup stuff there?)
while True:
res = yield self.store.db.updates.do_next_background_update(1000)
if res is None:
break
@defer.inlineCallbacks
def test_do_background_update(self):
desired_count = 1000
duration_ms = 42
# first step: make a bit of progress
@defer.inlineCallbacks
def update(progress, count):
self.clock.advance_time_msec(count * duration_ms)
progress = {"my_key": progress["my_key"] + 1}
yield self.store.db.runInteraction(
"update_progress",
self.store.db.updates._background_update_progress_txn,
"test_update",
progress,
)
return count
self.update_handler.side_effect = update
yield self.store.db.updates.start_background_update(
"test_update", {"my_key": 1}
)
self.update_handler.reset_mock()
result = yield self.store.db.updates.do_next_background_update(
duration_ms * desired_count
)
self.assertIsNotNone(result)
self.update_handler.assert_called_once_with(
{"my_key": 1}, self.store.db.updates.DEFAULT_BACKGROUND_BATCH_SIZE
)
# second step: complete the update
@defer.inlineCallbacks
def update(progress, count):
yield self.store.db.updates._end_background_update("test_update")
return count
self.update_handler.side_effect = update
self.update_handler.reset_mock()
result = yield self.store.db.updates.do_next_background_update(
duration_ms * desired_count
)
self.assertIsNotNone(result)
self.update_handler.assert_called_once_with({"my_key": 2}, desired_count)
# third step: we don't expect to be called any more
self.update_handler.reset_mock()
result = yield self.store.db.updates.do_next_background_update(
duration_ms * desired_count
)
self.assertIsNone(result)
self.assertFalse(self.update_handler.called)
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