101 lines
3.9 KiB
Python
101 lines
3.9 KiB
Python
# Copyright 2014 Rackspace, Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License"); you may
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# not use this file except in compliance with the License. You may obtain
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# a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
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# WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
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# License for the specific language governing permissions and limitations
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# under the License.
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import unittest
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import mock
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from oslo_service import loopingcall
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from ironic_python_agent import backoff
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class TestBackOffLoopingCall(unittest.TestCase):
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@mock.patch('random.gauss')
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@mock.patch('eventlet.greenthread.sleep')
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def test_exponential_backoff(self, sleep_mock, random_mock):
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def false():
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return False
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random_mock.return_value = .8
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self.assertRaises(backoff.LoopingCallTimeOut,
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backoff.BackOffLoopingCall(false).start()
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.wait)
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expected_times = [mock.call(1.6000000000000001),
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mock.call(2.5600000000000005),
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mock.call(4.096000000000001),
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mock.call(6.5536000000000021),
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mock.call(10.485760000000004),
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mock.call(16.777216000000006),
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mock.call(26.843545600000013),
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mock.call(42.949672960000022),
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mock.call(68.719476736000033),
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mock.call(109.95116277760006)]
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self.assertEqual(expected_times, sleep_mock.call_args_list)
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@mock.patch('random.gauss')
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@mock.patch('eventlet.greenthread.sleep')
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def test_no_backoff(self, sleep_mock, random_mock):
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random_mock.return_value = 1
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func = mock.Mock()
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# func.side_effect
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func.side_effect = [True, True, True, loopingcall.LoopingCallDone(
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retvalue='return value')]
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retvalue = backoff.BackOffLoopingCall(func).start().wait()
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expected_times = [mock.call(1), mock.call(1), mock.call(1)]
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self.assertEqual(expected_times, sleep_mock.call_args_list)
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self.assertTrue(retvalue, 'return value')
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@mock.patch('random.gauss')
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@mock.patch('eventlet.greenthread.sleep')
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def test_no_sleep(self, sleep_mock, random_mock):
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# Any call that executes properly the first time shouldn't sleep
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random_mock.return_value = 1
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func = mock.Mock()
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# func.side_effect
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func.side_effect = loopingcall.LoopingCallDone(retvalue='return value')
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retvalue = backoff.BackOffLoopingCall(func).start().wait()
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self.assertFalse(sleep_mock.called)
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self.assertTrue(retvalue, 'return value')
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@mock.patch('random.gauss')
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@mock.patch('eventlet.greenthread.sleep')
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def test_max_interval(self, sleep_mock, random_mock):
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def false():
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return False
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random_mock.return_value = .8
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self.assertRaises(backoff.LoopingCallTimeOut,
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backoff.BackOffLoopingCall(false).start(
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max_interval=60)
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.wait)
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expected_times = [mock.call(1.6000000000000001),
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mock.call(2.5600000000000005),
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mock.call(4.096000000000001),
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mock.call(6.5536000000000021),
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mock.call(10.485760000000004),
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mock.call(16.777216000000006),
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mock.call(26.843545600000013),
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mock.call(42.949672960000022),
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mock.call(60),
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mock.call(60),
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mock.call(60)]
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self.assertEqual(expected_times, sleep_mock.call_args_list)
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