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# -*- coding: utf-8 -*-
# Copyright 2016 OpenMarket Ltd
#
# 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 twisted.internet import defer
from synapse.util.async import Limiter
from tests import unittest
class LimiterTestCase(unittest.TestCase):
@defer.inlineCallbacks
def test_limiter(self):
limiter = Limiter(3)
key = object()
d1 = limiter.queue(key)
cm1 = yield d1
d2 = limiter.queue(key)
cm2 = yield d2
d3 = limiter.queue(key)
cm3 = yield d3
d4 = limiter.queue(key)
self.assertFalse(d4.called)
d5 = limiter.queue(key)
self.assertFalse(d5.called)
with cm1:
self.assertFalse(d4.called)
self.assertFalse(d5.called)
self.assertTrue(d4.called)
self.assertFalse(d5.called)
with cm3:
self.assertFalse(d5.called)
self.assertTrue(d5.called)
with cm2:
pass
with (yield d4):
pass
with (yield d5):
pass
d6 = limiter.queue(key)
with (yield d6):
pass
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