code.grnet.gr Git - ganeti-local/blob - test/ganeti.utils.retry_unittest.py

   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
  38   @staticmethod
  39   def _RaiseRetryAgain():
  40     raise utils.RetryAgain()
  41
  42   @staticmethod
  43   def _RaiseRetryAgainWithArg(args):
  44     raise utils.RetryAgain(*args)
  45
  46   def _WrongNestedLoop(self):
  47     return utils.Retry(self._RaiseRetryAgain, 0.01, 0.02)
  48
  49   def _RetryAndSucceed(self, retries):
  50     if self.retries < retries:
  51       self.retries += 1
  52       raise utils.RetryAgain()
  53     else:
  54       return True
  55
  56   def testRaiseTimeout(self):
  57     self.failUnlessRaises(utils.RetryTimeout, utils.Retry,
  58                           self._RaiseRetryAgain, 0.01, 0.02)
  59     self.failUnlessRaises(utils.RetryTimeout, utils.Retry,
  60                           self._RetryAndSucceed, 0.01, 0, args=[1])
  61     self.failUnlessEqual(self.retries, 1)
  62
  63   def testComplete(self):
  64     self.failUnlessEqual(utils.Retry(lambda: True, 0, 1), True)
  65     self.failUnlessEqual(utils.Retry(self._RetryAndSucceed, 0, 1, args=[2]),
  66                          True)
  67     self.failUnlessEqual(self.retries, 2)
  68
  69   def testNestedLoop(self):
  70     try:
  71       self.failUnlessRaises(errors.ProgrammerError, utils.Retry,
  72                             self._WrongNestedLoop, 0, 1)
  73     except utils.RetryTimeout:
  74       self.fail("Didn't detect inner loop's exception")
  75
  76   def testTimeoutArgument(self):
  77     retry_arg="my_important_debugging_message"
  78     try:
  79       utils.Retry(self._RaiseRetryAgainWithArg, 0.01, 0.02, args=[[retry_arg]])
  80     except utils.RetryTimeout, err:
  81       self.failUnlessEqual(err.args, (retry_arg, ))
  82     else:
  83       self.fail("Expected timeout didn't happen")
  84
  85   def testRaiseInnerWithExc(self):
  86     retry_arg="my_important_debugging_message"
  87     try:
  88       try:
  89         utils.Retry(self._RaiseRetryAgainWithArg, 0.01, 0.02,
  90                     args=[[errors.GenericError(retry_arg, retry_arg)]])
  91       except utils.RetryTimeout, err:
  92         err.RaiseInner()
  93       else:
  94         self.fail("Expected timeout didn't happen")
  95     except errors.GenericError, err:
  96       self.failUnlessEqual(err.args, (retry_arg, retry_arg))
  97     else:
  98       self.fail("Expected GenericError didn't happen")
  99
 100   def testRaiseInnerWithMsg(self):
 101     retry_arg="my_important_debugging_message"
 102     try:
 103       try:
 104         utils.Retry(self._RaiseRetryAgainWithArg, 0.01, 0.02,
 105                     args=[[retry_arg, retry_arg]])
 106       except utils.RetryTimeout, err:
 107         err.RaiseInner()
 108       else:
 109         self.fail("Expected timeout didn't happen")
 110     except utils.RetryTimeout, err:
 111       self.failUnlessEqual(err.args, (retry_arg, retry_arg))
 112     else:
 113       self.fail("Expected RetryTimeout didn't happen")
 114
 115
 116 if __name__ == "__main__":
 117   testutils.GanetiTestProgram()