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# Copyright 2019 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.
import sys
from typing import cast
from synapse.types import ISynapseReactor
try:
from twisted.internet.epollreactor import EPollReactor as Reactor
except ImportError:
from twisted.internet.pollreactor import PollReactor as Reactor # type: ignore[assignment]
from twisted.internet.main import installReactor
def make_reactor() -> ISynapseReactor:
"""
Instantiate and install a Twisted reactor suitable for testing (i.e. not the
default global one).
"""
reactor = Reactor()
if "twisted.internet.reactor" in sys.modules:
del sys.modules["twisted.internet.reactor"]
installReactor(reactor)
return cast(ISynapseReactor, reactor)
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