1# Copyright 2016 gRPC authors. 2# 3# Licensed under the Apache License, Version 2.0 (the "License"); 4# you may not use this file except in compliance with the License. 5# You may obtain a copy of the License at 6# 7# http://www.apache.org/licenses/LICENSE-2.0 8# 9# Unless required by applicable law or agreed to in writing, software 10# distributed under the License is distributed on an "AS IS" BASIS, 11# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12# See the License for the specific language governing permissions and 13# limitations under the License. 14 15import time 16import threading 17import unittest 18 19from grpc._cython import cygrpc 20 21from tests.unit.framework.common import test_constants 22 23 24def _channel(): 25 return cygrpc.Channel(b'localhost:54321', (), None) 26 27 28def _connectivity_loop(channel): 29 for _ in range(100): 30 connectivity = channel.check_connectivity_state(True) 31 channel.watch_connectivity_state(connectivity, time.time() + 0.2) 32 33 34def _create_loop_destroy(): 35 channel = _channel() 36 _connectivity_loop(channel) 37 channel.close(cygrpc.StatusCode.ok, 'Channel close!') 38 39 40def _in_parallel(behavior, arguments): 41 threads = tuple( 42 threading.Thread(target=behavior, args=arguments) 43 for _ in range(test_constants.THREAD_CONCURRENCY)) 44 for thread in threads: 45 thread.start() 46 for thread in threads: 47 thread.join() 48 49 50class ChannelTest(unittest.TestCase): 51 52 def test_single_channel_lonely_connectivity(self): 53 channel = _channel() 54 _connectivity_loop(channel) 55 channel.close(cygrpc.StatusCode.ok, 'Channel close!') 56 57 def test_multiple_channels_lonely_connectivity(self): 58 _in_parallel(_create_loop_destroy, ()) 59 60 def test_negative_deadline_connectivity(self): 61 channel = _channel() 62 connectivity = channel.check_connectivity_state(True) 63 channel.watch_connectivity_state(connectivity, -3.14) 64 channel.close(cygrpc.StatusCode.ok, 'Channel close!') 65 # NOTE(lidiz) The negative timeout should not trigger SIGABRT. 66 # Bug report: https://github.com/grpc/grpc/issues/18244 67 68 69if __name__ == '__main__': 70 unittest.main(verbosity=2) 71