6e2b0f7799
One of the bandit checks is to attempt to use the system random library (which is better at producing randomness) vs using the default random class, this change uses the system random where applicable. See: https://wiki.openstack.org/wiki/Security/Projects/Bandit Change-Id: I15ae3c99267b2dd9dc9ceccd427f6c0aef6ae8da
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.SystemRandom.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.SystemRandom.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.SystemRandom.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.SystemRandom.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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