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# 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', ())
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,
time.time() + 0.2, completion_queue,
None)
completion_queue.poll()
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)
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