root / test / ganeti.utils.retry_unittest.py @ 2c7a0373
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1 | 79d22269 | Michael Hanselmann | #!/usr/bin/python
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2 | 79d22269 | Michael Hanselmann | #
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3 | 79d22269 | Michael Hanselmann | |
4 | 79d22269 | Michael Hanselmann | # Copyright (C) 2011 Google Inc.
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5 | 79d22269 | Michael Hanselmann | #
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6 | 79d22269 | Michael Hanselmann | # This program is free software; you can redistribute it and/or modify
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7 | 79d22269 | Michael Hanselmann | # it under the terms of the GNU General Public License as published by
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8 | 79d22269 | Michael Hanselmann | # the Free Software Foundation; either version 2 of the License, or
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9 | 79d22269 | Michael Hanselmann | # (at your option) any later version.
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10 | 79d22269 | Michael Hanselmann | #
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11 | 79d22269 | Michael Hanselmann | # This program is distributed in the hope that it will be useful, but
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12 | 79d22269 | Michael Hanselmann | # WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | 79d22269 | Michael Hanselmann | # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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14 | 79d22269 | Michael Hanselmann | # General Public License for more details.
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15 | 79d22269 | Michael Hanselmann | #
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16 | 79d22269 | Michael Hanselmann | # You should have received a copy of the GNU General Public License
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17 | 79d22269 | Michael Hanselmann | # along with this program; if not, write to the Free Software
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18 | 79d22269 | Michael Hanselmann | # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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19 | 79d22269 | Michael Hanselmann | # 02110-1301, USA.
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20 | 79d22269 | Michael Hanselmann | |
21 | 79d22269 | Michael Hanselmann | |
22 | 79d22269 | Michael Hanselmann | """Script for testing ganeti.utils.retry"""
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23 | 79d22269 | Michael Hanselmann | |
24 | 79d22269 | Michael Hanselmann | import unittest |
25 | 79d22269 | Michael Hanselmann | |
26 | 79d22269 | Michael Hanselmann | from ganeti import constants |
27 | 79d22269 | Michael Hanselmann | from ganeti import errors |
28 | 79d22269 | Michael Hanselmann | from ganeti import utils |
29 | 79d22269 | Michael Hanselmann | |
30 | 79d22269 | Michael Hanselmann | import testutils |
31 | 79d22269 | Michael Hanselmann | |
32 | 79d22269 | Michael Hanselmann | |
33 | 79d22269 | Michael Hanselmann | class TestRetry(testutils.GanetiTestCase): |
34 | 79d22269 | Michael Hanselmann | def setUp(self): |
35 | 79d22269 | Michael Hanselmann | testutils.GanetiTestCase.setUp(self)
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36 | 79d22269 | Michael Hanselmann | self.retries = 0 |
37 | c7d3a832 | Iustin Pop | self.called = 0 |
38 | 79d22269 | Michael Hanselmann | |
39 | 79d22269 | Michael Hanselmann | @staticmethod
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40 | 79d22269 | Michael Hanselmann | def _RaiseRetryAgain(): |
41 | 79d22269 | Michael Hanselmann | raise utils.RetryAgain()
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42 | 79d22269 | Michael Hanselmann | |
43 | 79d22269 | Michael Hanselmann | @staticmethod
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44 | 79d22269 | Michael Hanselmann | def _RaiseRetryAgainWithArg(args): |
45 | 79d22269 | Michael Hanselmann | raise utils.RetryAgain(*args)
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46 | 79d22269 | Michael Hanselmann | |
47 | 79d22269 | Michael Hanselmann | def _WrongNestedLoop(self): |
48 | 79d22269 | Michael Hanselmann | return utils.Retry(self._RaiseRetryAgain, 0.01, 0.02) |
49 | 79d22269 | Michael Hanselmann | |
50 | 79d22269 | Michael Hanselmann | def _RetryAndSucceed(self, retries): |
51 | 79d22269 | Michael Hanselmann | if self.retries < retries: |
52 | 79d22269 | Michael Hanselmann | self.retries += 1 |
53 | 79d22269 | Michael Hanselmann | raise utils.RetryAgain()
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54 | 79d22269 | Michael Hanselmann | else:
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55 | 79d22269 | Michael Hanselmann | return True |
56 | 79d22269 | Michael Hanselmann | |
57 | c7d3a832 | Iustin Pop | def _SimpleRetryAndSucceed(self, retries): |
58 | c7d3a832 | Iustin Pop | self.called += 1 |
59 | c7d3a832 | Iustin Pop | if self.retries < retries: |
60 | c7d3a832 | Iustin Pop | self.retries += 1 |
61 | c7d3a832 | Iustin Pop | return False |
62 | c7d3a832 | Iustin Pop | else:
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63 | c7d3a832 | Iustin Pop | return True |
64 | c7d3a832 | Iustin Pop | |
65 | 79d22269 | Michael Hanselmann | def testRaiseTimeout(self): |
66 | 79d22269 | Michael Hanselmann | self.failUnlessRaises(utils.RetryTimeout, utils.Retry,
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67 | 79d22269 | Michael Hanselmann | self._RaiseRetryAgain, 0.01, 0.02) |
68 | 79d22269 | Michael Hanselmann | self.failUnlessRaises(utils.RetryTimeout, utils.Retry,
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69 | 79d22269 | Michael Hanselmann | self._RetryAndSucceed, 0.01, 0, args=[1]) |
70 | 79d22269 | Michael Hanselmann | self.failUnlessEqual(self.retries, 1) |
71 | 79d22269 | Michael Hanselmann | |
72 | 79d22269 | Michael Hanselmann | def testComplete(self): |
73 | 79d22269 | Michael Hanselmann | self.failUnlessEqual(utils.Retry(lambda: True, 0, 1), True) |
74 | 79d22269 | Michael Hanselmann | self.failUnlessEqual(utils.Retry(self._RetryAndSucceed, 0, 1, args=[2]), |
75 | 79d22269 | Michael Hanselmann | True)
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76 | 79d22269 | Michael Hanselmann | self.failUnlessEqual(self.retries, 2) |
77 | 79d22269 | Michael Hanselmann | |
78 | 79d22269 | Michael Hanselmann | def testNestedLoop(self): |
79 | 79d22269 | Michael Hanselmann | try:
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80 | 79d22269 | Michael Hanselmann | self.failUnlessRaises(errors.ProgrammerError, utils.Retry,
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81 | 79d22269 | Michael Hanselmann | self._WrongNestedLoop, 0, 1) |
82 | 79d22269 | Michael Hanselmann | except utils.RetryTimeout:
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83 | 79d22269 | Michael Hanselmann | self.fail("Didn't detect inner loop's exception") |
84 | 79d22269 | Michael Hanselmann | |
85 | 79d22269 | Michael Hanselmann | def testTimeoutArgument(self): |
86 | 79d22269 | Michael Hanselmann | retry_arg="my_important_debugging_message"
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87 | 79d22269 | Michael Hanselmann | try:
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88 | 79d22269 | Michael Hanselmann | utils.Retry(self._RaiseRetryAgainWithArg, 0.01, 0.02, args=[[retry_arg]]) |
89 | 79d22269 | Michael Hanselmann | except utils.RetryTimeout, err:
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90 | 79d22269 | Michael Hanselmann | self.failUnlessEqual(err.args, (retry_arg, ))
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91 | 79d22269 | Michael Hanselmann | else:
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92 | 79d22269 | Michael Hanselmann | self.fail("Expected timeout didn't happen") |
93 | 79d22269 | Michael Hanselmann | |
94 | 79d22269 | Michael Hanselmann | def testRaiseInnerWithExc(self): |
95 | 79d22269 | Michael Hanselmann | retry_arg="my_important_debugging_message"
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96 | 79d22269 | Michael Hanselmann | try:
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97 | 79d22269 | Michael Hanselmann | try:
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98 | 79d22269 | Michael Hanselmann | utils.Retry(self._RaiseRetryAgainWithArg, 0.01, 0.02, |
99 | 79d22269 | Michael Hanselmann | args=[[errors.GenericError(retry_arg, retry_arg)]]) |
100 | 79d22269 | Michael Hanselmann | except utils.RetryTimeout, err:
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101 | 79d22269 | Michael Hanselmann | err.RaiseInner() |
102 | 79d22269 | Michael Hanselmann | else:
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103 | 79d22269 | Michael Hanselmann | self.fail("Expected timeout didn't happen") |
104 | 79d22269 | Michael Hanselmann | except errors.GenericError, err:
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105 | 79d22269 | Michael Hanselmann | self.failUnlessEqual(err.args, (retry_arg, retry_arg))
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106 | 79d22269 | Michael Hanselmann | else:
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107 | 79d22269 | Michael Hanselmann | self.fail("Expected GenericError didn't happen") |
108 | 79d22269 | Michael Hanselmann | |
109 | 79d22269 | Michael Hanselmann | def testRaiseInnerWithMsg(self): |
110 | 79d22269 | Michael Hanselmann | retry_arg="my_important_debugging_message"
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111 | 79d22269 | Michael Hanselmann | try:
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112 | 79d22269 | Michael Hanselmann | try:
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113 | 79d22269 | Michael Hanselmann | utils.Retry(self._RaiseRetryAgainWithArg, 0.01, 0.02, |
114 | 79d22269 | Michael Hanselmann | args=[[retry_arg, retry_arg]]) |
115 | 79d22269 | Michael Hanselmann | except utils.RetryTimeout, err:
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116 | 79d22269 | Michael Hanselmann | err.RaiseInner() |
117 | 79d22269 | Michael Hanselmann | else:
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118 | 79d22269 | Michael Hanselmann | self.fail("Expected timeout didn't happen") |
119 | 79d22269 | Michael Hanselmann | except utils.RetryTimeout, err:
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120 | 79d22269 | Michael Hanselmann | self.failUnlessEqual(err.args, (retry_arg, retry_arg))
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121 | 79d22269 | Michael Hanselmann | else:
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122 | 79d22269 | Michael Hanselmann | self.fail("Expected RetryTimeout didn't happen") |
123 | 79d22269 | Michael Hanselmann | |
124 | c7d3a832 | Iustin Pop | def testSimpleRetry(self): |
125 | c7d3a832 | Iustin Pop | self.assertFalse(utils.SimpleRetry(True, lambda: False, 0.01, 0.02)) |
126 | c7d3a832 | Iustin Pop | self.assertFalse(utils.SimpleRetry(lambda x: x, lambda: False, 0.01, 0.02)) |
127 | c7d3a832 | Iustin Pop | self.assertTrue(utils.SimpleRetry(True, lambda: True, 0, 1)) |
128 | c7d3a832 | Iustin Pop | self.assertTrue(utils.SimpleRetry(lambda x: x, lambda: True, 0, 1)) |
129 | c7d3a832 | Iustin Pop | self.assertTrue(utils.SimpleRetry(True, self._SimpleRetryAndSucceed, |
130 | c7d3a832 | Iustin Pop | 0, 1, args=[1])) |
131 | c7d3a832 | Iustin Pop | self.assertEqual(self.retries, 1) |
132 | c7d3a832 | Iustin Pop | self.assertEqual(self.called, 2) |
133 | c7d3a832 | Iustin Pop | self.called = self.retries = 0 |
134 | c7d3a832 | Iustin Pop | self.assertTrue(utils.SimpleRetry(True, self._SimpleRetryAndSucceed, |
135 | c7d3a832 | Iustin Pop | 0, 1, args=[2])) |
136 | c7d3a832 | Iustin Pop | self.assertEqual(self.called, 3) |
137 | c7d3a832 | Iustin Pop | |
138 | 79d22269 | Michael Hanselmann | |
139 | 79d22269 | Michael Hanselmann | if __name__ == "__main__": |
140 | 79d22269 | Michael Hanselmann | testutils.GanetiTestProgram() |