# -*- coding: utf-8 -*-
# Copyright 2017 Vector Creations 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 synapse import util
from twisted.internet import defer
from tests import unittest


class ClockTestCase(unittest.TestCase):
    @defer.inlineCallbacks
    def test_time_bound_deferred(self):
        # just a deferred which never resolves
        slow_deferred = defer.Deferred()

        clock = util.Clock()
        time_bound = clock.time_bound_deferred(slow_deferred, 0.001)

        try:
            yield time_bound
            self.fail("Expected timedout error, but got nothing")
        except util.DeferredTimedOutError:
            pass
