apprise/test/helpers/asyncio.py

# -*- coding: utf-8 -*-
#
# Copyright (C) 2022 Chris Caron <lead2gold@gmail.com>
# All rights reserved.
#
# This code is licensed under the MIT License.
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files(the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and / or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions :
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.IN NO EVENT SHALL THE
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# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.
import asyncio


class OuterEventLoop():
    """
    An event loop that is easy to put up and tear down from synchronous test
    code.
    """

    def __init__(self):
        self._loop = None

    def __enter__(self):
        loop = asyncio.new_event_loop()
        asyncio.set_event_loop(loop)
        self._loop = loop
        return loop

    def __exit__(self, type, value, traceback):
        asyncio.set_event_loop(None)
        self._loop.close()