| # Copyright 2016 gRPC authors. |
| # |
| # 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 time |
| import threading |
| import unittest |
| |
| from grpc._cython import cygrpc |
| |
| from tests.unit.framework.common import test_constants |
| |
| |
| def _channel_and_completion_queue(): |
| channel = cygrpc.Channel(b'localhost:54321', cygrpc.ChannelArgs(())) |
| completion_queue = cygrpc.CompletionQueue() |
| return channel, completion_queue |
| |
| |
| def _connectivity_loop(channel, completion_queue): |
| for _ in range(100): |
| connectivity = channel.check_connectivity_state(True) |
| channel.watch_connectivity_state(connectivity, |
| cygrpc.Timespec(time.time() + 0.2), |
| completion_queue, None) |
| completion_queue.poll(deadline=cygrpc.Timespec(float('+inf'))) |
| |
| |
| def _create_loop_destroy(): |
| channel, completion_queue = _channel_and_completion_queue() |
| _connectivity_loop(channel, completion_queue) |
| completion_queue.shutdown() |
| |
| |
| def _in_parallel(behavior, arguments): |
| threads = tuple( |
| threading.Thread(target=behavior, args=arguments) |
| for _ in range(test_constants.THREAD_CONCURRENCY)) |
| for thread in threads: |
| thread.start() |
| for thread in threads: |
| thread.join() |
| |
| |
| class ChannelTest(unittest.TestCase): |
| |
| def test_single_channel_lonely_connectivity(self): |
| channel, completion_queue = _channel_and_completion_queue() |
| _in_parallel(_connectivity_loop, (channel, completion_queue,)) |
| completion_queue.shutdown() |
| |
| def test_multiple_channels_lonely_connectivity(self): |
| _in_parallel(_create_loop_destroy, ()) |
| |
| |
| if __name__ == '__main__': |
| unittest.main(verbosity=2) |