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OpenStack Study: test_async_process.py**** CubicPower OpenStack Study ****
# vim: tabstop=4 shiftwidth=4 softtabstop=4 # Copyright 2013 Red Hat, Inc. # # 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 eventlet import fixtures from six.moves import xrange from neutron.agent.linux import async_process from neutron.tests import base
**** CubicPower OpenStack Study **** class TestAsyncProcess(base.BaseTestCase):
**** CubicPower OpenStack Study **** def setUp(self): super(TestAsyncProcess, self).setUp() self.test_file_path = self.useFixture( fixtures.TempDir()).join("test_async_process.tmp") self.data = [str(x) for x in xrange(4)] with file(self.test_file_path, 'w') as f: f.writelines('%s\n' % item for item in self.data)
**** CubicPower OpenStack Study **** def _check_stdout(self, proc): # Ensure that all the output from the file is read output = [] while output != self.data: new_output = list(proc.iter_stdout()) if new_output: output += new_output eventlet.sleep(0.01)
**** CubicPower OpenStack Study **** def test_stopping_async_process_lifecycle(self): with self.assert_max_execution_time(): proc = async_process.AsyncProcess(['tail', '-f', self.test_file_path]) proc.start() self._check_stdout(proc) proc.stop() # Ensure that the process and greenthreads have stopped proc._process.wait() self.assertEqual(proc._process.returncode, -9) for watcher in proc._watchers: watcher.wait()
**** CubicPower OpenStack Study **** def test_async_process_respawns(self): with self.assert_max_execution_time(): proc = async_process.AsyncProcess(['tail', '-f', self.test_file_path], respawn_interval=0) proc.start() # Ensure that the same output is read twice self._check_stdout(proc) pid = proc._get_pid_to_kill() proc._kill_process(pid) self._check_stdout(proc) proc.stop()
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