root / test / py / ganeti.utils.retry_unittest.py @ 560ef132
History | View | Annotate | Download (7.1 kB)
| 1 |
#!/usr/bin/python
|
|---|---|
| 2 |
#
|
| 3 |
|
| 4 |
# Copyright (C) 2011 Google Inc.
|
| 5 |
#
|
| 6 |
# This program is free software; you can redistribute it and/or modify
|
| 7 |
# it under the terms of the GNU General Public License as published by
|
| 8 |
# the Free Software Foundation; either version 2 of the License, or
|
| 9 |
# (at your option) any later version.
|
| 10 |
#
|
| 11 |
# This program is distributed in the hope that it will be useful, but
|
| 12 |
# WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 13 |
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
| 14 |
# General Public License for more details.
|
| 15 |
#
|
| 16 |
# You should have received a copy of the GNU General Public License
|
| 17 |
# along with this program; if not, write to the Free Software
|
| 18 |
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
|
| 19 |
# 02110-1301, USA.
|
| 20 |
|
| 21 |
|
| 22 |
"""Script for testing ganeti.utils.retry"""
|
| 23 |
|
| 24 |
import unittest |
| 25 |
|
| 26 |
from ganeti import constants |
| 27 |
from ganeti import errors |
| 28 |
from ganeti import utils |
| 29 |
|
| 30 |
import testutils |
| 31 |
|
| 32 |
|
| 33 |
class TestRetry(testutils.GanetiTestCase): |
| 34 |
def setUp(self): |
| 35 |
testutils.GanetiTestCase.setUp(self)
|
| 36 |
self.retries = 0 |
| 37 |
self.called = 0 |
| 38 |
self.time = 1379601882.0 |
| 39 |
self.time_for_time_fn = 0 |
| 40 |
self.time_for_retry_and_succeed = 0 |
| 41 |
|
| 42 |
def _time_fn(self): |
| 43 |
self.time += self.time_for_time_fn |
| 44 |
return self.time |
| 45 |
|
| 46 |
def _wait_fn(self, delay): |
| 47 |
self.time += delay
|
| 48 |
|
| 49 |
@staticmethod
|
| 50 |
def _RaiseRetryAgain(): |
| 51 |
raise utils.RetryAgain()
|
| 52 |
|
| 53 |
@staticmethod
|
| 54 |
def _RaiseRetryAgainWithArg(args): |
| 55 |
raise utils.RetryAgain(*args)
|
| 56 |
|
| 57 |
def _WrongNestedLoop(self): |
| 58 |
return utils.Retry(self._RaiseRetryAgain, 0.01, 0.02) |
| 59 |
|
| 60 |
def _RetryAndSucceed(self, retries): |
| 61 |
self.time += self.time_for_retry_and_succeed |
| 62 |
if self.retries < retries: |
| 63 |
self.retries += 1 |
| 64 |
raise utils.RetryAgain()
|
| 65 |
else:
|
| 66 |
return True |
| 67 |
|
| 68 |
def _SimpleRetryAndSucceed(self, retries): |
| 69 |
self.called += 1 |
| 70 |
if self.retries < retries: |
| 71 |
self.retries += 1 |
| 72 |
return False |
| 73 |
else:
|
| 74 |
return True |
| 75 |
|
| 76 |
def testRaiseTimeout(self): |
| 77 |
self.failUnlessRaises(utils.RetryTimeout, utils.Retry,
|
| 78 |
self._RaiseRetryAgain, 0.01, 0.02, |
| 79 |
wait_fn = self._wait_fn, _time_fn = self._time_fn) |
| 80 |
self.failUnlessRaises(utils.RetryTimeout, utils.Retry,
|
| 81 |
self._RetryAndSucceed, 0.01, 0, args=[1], |
| 82 |
wait_fn = self._wait_fn, _time_fn = self._time_fn) |
| 83 |
self.failUnlessEqual(self.retries, 1) |
| 84 |
|
| 85 |
def testComplete(self): |
| 86 |
self.failUnlessEqual(utils.Retry(lambda: True, 0, 1, |
| 87 |
wait_fn = self._wait_fn,
|
| 88 |
_time_fn = self._time_fn),
|
| 89 |
True)
|
| 90 |
self.failUnlessEqual(utils.Retry(self._RetryAndSucceed, 0, 1, args=[2], |
| 91 |
wait_fn = self._wait_fn,
|
| 92 |
_time_fn = self._time_fn),
|
| 93 |
True)
|
| 94 |
self.failUnlessEqual(self.retries, 2) |
| 95 |
|
| 96 |
def testCompleteNontrivialTimes(self): |
| 97 |
self.time_for_time_fn = 0.01 |
| 98 |
self.time_for_retry_and_succeed = 0.1 |
| 99 |
self.failUnlessEqual(utils.Retry(self._RetryAndSucceed, 0, 1, args=[2], |
| 100 |
wait_fn = self._wait_fn,
|
| 101 |
_time_fn = self._time_fn),
|
| 102 |
True)
|
| 103 |
self.failUnlessEqual(self.retries, 2) |
| 104 |
|
| 105 |
def testNestedLoop(self): |
| 106 |
try:
|
| 107 |
self.failUnlessRaises(errors.ProgrammerError, utils.Retry,
|
| 108 |
self._WrongNestedLoop, 0, 1, |
| 109 |
wait_fn = self._wait_fn, _time_fn = self._time_fn) |
| 110 |
except utils.RetryTimeout:
|
| 111 |
self.fail("Didn't detect inner loop's exception") |
| 112 |
|
| 113 |
def testTimeoutArgument(self): |
| 114 |
retry_arg="my_important_debugging_message"
|
| 115 |
try:
|
| 116 |
utils.Retry(self._RaiseRetryAgainWithArg, 0.01, 0.02, args=[[retry_arg]], |
| 117 |
wait_fn = self._wait_fn, _time_fn = self._time_fn) |
| 118 |
except utils.RetryTimeout, err:
|
| 119 |
self.failUnlessEqual(err.args, (retry_arg, ))
|
| 120 |
else:
|
| 121 |
self.fail("Expected timeout didn't happen") |
| 122 |
|
| 123 |
def testTimeout(self): |
| 124 |
self.time_for_time_fn = 0.01 |
| 125 |
self.time_for_retry_and_succeed = 10 |
| 126 |
try:
|
| 127 |
utils.Retry(self._RetryAndSucceed, 1, 18, args=[2], |
| 128 |
wait_fn = self._wait_fn, _time_fn = self._time_fn) |
| 129 |
except utils.RetryTimeout, err:
|
| 130 |
self.failUnlessEqual(err.args, ())
|
| 131 |
else:
|
| 132 |
self.fail("Expected timeout didn't happen") |
| 133 |
|
| 134 |
def testNoTimeout(self): |
| 135 |
self.time_for_time_fn = 0.01 |
| 136 |
self.time_for_retry_and_succeed = 8 |
| 137 |
self.failUnlessEqual(
|
| 138 |
utils.Retry(self._RetryAndSucceed, 1, 18, args=[2], |
| 139 |
wait_fn = self._wait_fn, _time_fn = self._time_fn), |
| 140 |
True)
|
| 141 |
|
| 142 |
def testRaiseInnerWithExc(self): |
| 143 |
retry_arg="my_important_debugging_message"
|
| 144 |
try:
|
| 145 |
try:
|
| 146 |
utils.Retry(self._RaiseRetryAgainWithArg, 0.01, 0.02, |
| 147 |
args=[[errors.GenericError(retry_arg, retry_arg)]], |
| 148 |
wait_fn = self._wait_fn, _time_fn = self._time_fn) |
| 149 |
except utils.RetryTimeout, err:
|
| 150 |
err.RaiseInner() |
| 151 |
else:
|
| 152 |
self.fail("Expected timeout didn't happen") |
| 153 |
except errors.GenericError, err:
|
| 154 |
self.failUnlessEqual(err.args, (retry_arg, retry_arg))
|
| 155 |
else:
|
| 156 |
self.fail("Expected GenericError didn't happen") |
| 157 |
|
| 158 |
def testRaiseInnerWithMsg(self): |
| 159 |
retry_arg="my_important_debugging_message"
|
| 160 |
try:
|
| 161 |
try:
|
| 162 |
utils.Retry(self._RaiseRetryAgainWithArg, 0.01, 0.02, |
| 163 |
args=[[retry_arg, retry_arg]], |
| 164 |
wait_fn = self._wait_fn, _time_fn = self._time_fn) |
| 165 |
except utils.RetryTimeout, err:
|
| 166 |
err.RaiseInner() |
| 167 |
else:
|
| 168 |
self.fail("Expected timeout didn't happen") |
| 169 |
except utils.RetryTimeout, err:
|
| 170 |
self.failUnlessEqual(err.args, (retry_arg, retry_arg))
|
| 171 |
else:
|
| 172 |
self.fail("Expected RetryTimeout didn't happen") |
| 173 |
|
| 174 |
def testSimpleRetry(self): |
| 175 |
self.assertFalse(utils.SimpleRetry(True, lambda: False, 0.01, 0.02, |
| 176 |
wait_fn = self._wait_fn,
|
| 177 |
_time_fn = self._time_fn))
|
| 178 |
self.assertFalse(utils.SimpleRetry(lambda x: x, lambda: False, 0.01, 0.02, |
| 179 |
wait_fn = self._wait_fn,
|
| 180 |
_time_fn = self._time_fn))
|
| 181 |
self.assertTrue(utils.SimpleRetry(True, lambda: True, 0, 1, |
| 182 |
wait_fn = self._wait_fn,
|
| 183 |
_time_fn = self._time_fn))
|
| 184 |
self.assertTrue(utils.SimpleRetry(lambda x: x, lambda: True, 0, 1, |
| 185 |
wait_fn = self._wait_fn,
|
| 186 |
_time_fn = self._time_fn))
|
| 187 |
self.assertTrue(utils.SimpleRetry(True, self._SimpleRetryAndSucceed, 0, 1, |
| 188 |
args=[1], wait_fn = self._wait_fn, |
| 189 |
_time_fn = self._time_fn))
|
| 190 |
self.assertEqual(self.retries, 1) |
| 191 |
self.assertEqual(self.called, 2) |
| 192 |
self.called = self.retries = 0 |
| 193 |
self.assertTrue(utils.SimpleRetry(True, self._SimpleRetryAndSucceed, 0, 1, |
| 194 |
args=[2], wait_fn = self._wait_fn, |
| 195 |
_time_fn = self._time_fn))
|
| 196 |
self.assertEqual(self.called, 3) |
| 197 |
|
| 198 |
|
| 199 |
if __name__ == "__main__": |
| 200 |
testutils.GanetiTestProgram() |