root / test / py / ganeti.utils.retry_unittest.py @ 38d1ee54
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#!/usr/bin/python
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#
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# Copyright (C) 2011 Google Inc.
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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# General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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# 02110-1301, USA.
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"""Script for testing ganeti.utils.retry"""
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import unittest |
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from ganeti import constants |
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from ganeti import errors |
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from ganeti import utils |
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import testutils |
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class TestRetry(testutils.GanetiTestCase): |
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def setUp(self): |
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testutils.GanetiTestCase.setUp(self)
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self.retries = 0 |
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self.called = 0 |
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self.time = 1379601882.0 |
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def _time_fn(self): |
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return self.time |
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def _wait_fn(self, delay): |
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self.time += delay
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@staticmethod
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def _RaiseRetryAgain(): |
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raise utils.RetryAgain()
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@staticmethod
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def _RaiseRetryAgainWithArg(args): |
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raise utils.RetryAgain(*args)
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def _WrongNestedLoop(self): |
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return utils.Retry(self._RaiseRetryAgain, 0.01, 0.02) |
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def _RetryAndSucceed(self, retries): |
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if self.retries < retries: |
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self.retries += 1 |
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raise utils.RetryAgain()
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else:
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return True |
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def _SimpleRetryAndSucceed(self, retries): |
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self.called += 1 |
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if self.retries < retries: |
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self.retries += 1 |
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return False |
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else:
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return True |
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def testRaiseTimeout(self): |
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self.failUnlessRaises(utils.RetryTimeout, utils.Retry,
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self._RaiseRetryAgain, 0.01, 0.02, |
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wait_fn = self._wait_fn, _time_fn = self._time_fn) |
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self.failUnlessRaises(utils.RetryTimeout, utils.Retry,
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self._RetryAndSucceed, 0.01, 0, args=[1], |
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wait_fn = self._wait_fn, _time_fn = self._time_fn) |
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self.failUnlessEqual(self.retries, 1) |
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def testComplete(self): |
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self.failUnlessEqual(utils.Retry(lambda: True, 0, 1, |
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wait_fn = self._wait_fn,
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_time_fn = self._time_fn),
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True)
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self.failUnlessEqual(utils.Retry(self._RetryAndSucceed, 0, 1, args=[2], |
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wait_fn = self._wait_fn,
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_time_fn = self._time_fn),
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True)
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self.failUnlessEqual(self.retries, 2) |
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def testNestedLoop(self): |
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try:
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self.failUnlessRaises(errors.ProgrammerError, utils.Retry,
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self._WrongNestedLoop, 0, 1, |
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wait_fn = self._wait_fn, _time_fn = self._time_fn) |
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except utils.RetryTimeout:
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self.fail("Didn't detect inner loop's exception") |
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def testTimeoutArgument(self): |
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retry_arg="my_important_debugging_message"
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try:
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utils.Retry(self._RaiseRetryAgainWithArg, 0.01, 0.02, args=[[retry_arg]], |
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wait_fn = self._wait_fn, _time_fn = self._time_fn) |
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except utils.RetryTimeout, err:
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self.failUnlessEqual(err.args, (retry_arg, ))
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else:
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self.fail("Expected timeout didn't happen") |
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def testRaiseInnerWithExc(self): |
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retry_arg="my_important_debugging_message"
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try:
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try:
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utils.Retry(self._RaiseRetryAgainWithArg, 0.01, 0.02, |
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args=[[errors.GenericError(retry_arg, retry_arg)]], |
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wait_fn = self._wait_fn, _time_fn = self._time_fn) |
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except utils.RetryTimeout, err:
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err.RaiseInner() |
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else:
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self.fail("Expected timeout didn't happen") |
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except errors.GenericError, err:
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self.failUnlessEqual(err.args, (retry_arg, retry_arg))
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else:
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self.fail("Expected GenericError didn't happen") |
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def testRaiseInnerWithMsg(self): |
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retry_arg="my_important_debugging_message"
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try:
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try:
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utils.Retry(self._RaiseRetryAgainWithArg, 0.01, 0.02, |
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args=[[retry_arg, retry_arg]], |
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wait_fn = self._wait_fn, _time_fn = self._time_fn) |
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except utils.RetryTimeout, err:
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err.RaiseInner() |
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else:
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self.fail("Expected timeout didn't happen") |
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except utils.RetryTimeout, err:
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self.failUnlessEqual(err.args, (retry_arg, retry_arg))
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else:
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self.fail("Expected RetryTimeout didn't happen") |
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def testSimpleRetry(self): |
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self.assertFalse(utils.SimpleRetry(True, lambda: False, 0.01, 0.02, |
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wait_fn = self._wait_fn,
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_time_fn = self._time_fn))
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self.assertFalse(utils.SimpleRetry(lambda x: x, lambda: False, 0.01, 0.02, |
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wait_fn = self._wait_fn,
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_time_fn = self._time_fn))
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self.assertTrue(utils.SimpleRetry(True, lambda: True, 0, 1, |
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wait_fn = self._wait_fn,
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_time_fn = self._time_fn))
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self.assertTrue(utils.SimpleRetry(lambda x: x, lambda: True, 0, 1, |
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wait_fn = self._wait_fn,
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_time_fn = self._time_fn))
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self.assertTrue(utils.SimpleRetry(True, self._SimpleRetryAndSucceed, 0, 1, |
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args=[1], wait_fn = self._wait_fn, |
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_time_fn = self._time_fn))
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self.assertEqual(self.retries, 1) |
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self.assertEqual(self.called, 2) |
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self.called = self.retries = 0 |
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self.assertTrue(utils.SimpleRetry(True, self._SimpleRetryAndSucceed, 0, 1, |
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args=[2], wait_fn = self._wait_fn, |
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_time_fn = self._time_fn))
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self.assertEqual(self.called, 3) |
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if __name__ == "__main__": |
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testutils.GanetiTestProgram() |