root / test / py / ganeti.asyncnotifier_unittest.py @ 91c17910
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#!/usr/bin/python
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#
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# Copyright (C) 2010, 2012 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 unittesting the asyncnotifier module"""
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import unittest |
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import signal |
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import os |
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import tempfile |
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import shutil |
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try:
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# pylint: disable=E0611
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from pyinotify import pyinotify |
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except ImportError: |
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import pyinotify |
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from ganeti import asyncnotifier |
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from ganeti import daemon |
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from ganeti import utils |
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from ganeti import errors |
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import testutils |
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class _MyErrorLoggingAsyncNotifier(asyncnotifier.ErrorLoggingAsyncNotifier): |
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def __init__(self, *args, **kwargs): |
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asyncnotifier.ErrorLoggingAsyncNotifier.__init__(self, *args, **kwargs)
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self.error_count = 0 |
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def handle_error(self): |
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self.error_count += 1 |
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raise
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class TestSingleFileEventHandler(testutils.GanetiTestCase): |
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"""Test daemon.Mainloop"""
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NOTIFIERS = [NOTIFIER_TERM, NOTIFIER_NORM, NOTIFIER_ERR] = range(3) |
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def setUp(self): |
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testutils.GanetiTestCase.setUp(self)
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self.mainloop = daemon.Mainloop()
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self.chk_files = [self._CreateTempFile() for i in self.NOTIFIERS] |
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self.notified = [False for i in self.NOTIFIERS] |
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# We need one watch manager per notifier, as those contain the file
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# descriptor which is monitored by asyncore
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self.wms = [pyinotify.WatchManager() for i in self.NOTIFIERS] |
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self.cbk = [self.OnInotifyCallback(self, i) for i in self.NOTIFIERS] |
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self.ihandler = [asyncnotifier.SingleFileEventHandler(wm, cb, cf)
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for (wm, cb, cf) in |
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zip(self.wms, self.cbk, self.chk_files)] |
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self.notifiers = [_MyErrorLoggingAsyncNotifier(wm, ih)
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for (wm, ih) in zip(self.wms, self.ihandler)] |
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# TERM notifier is enabled by default, as we use it to get out of the loop
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self.ihandler[self.NOTIFIER_TERM].enable() |
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def tearDown(self): |
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# disable the inotifiers, before removing the files
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for i in self.ihandler: |
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i.disable() |
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testutils.GanetiTestCase.tearDown(self)
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# and unregister the fd's being polled
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for n in self.notifiers: |
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n.del_channel() |
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class OnInotifyCallback: |
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def __init__(self, testobj, i): |
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self.testobj = testobj
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self.notified = testobj.notified
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self.i = i
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def __call__(self, enabled): |
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self.notified[self.i] = True |
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if self.i == self.testobj.NOTIFIER_TERM: |
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os.kill(os.getpid(), signal.SIGTERM) |
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elif self.i == self.testobj.NOTIFIER_ERR: |
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raise errors.GenericError("an error") |
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def testReplace(self): |
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utils.WriteFile(self.chk_files[self.NOTIFIER_TERM], data="dummy") |
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self.mainloop.Run()
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self.assert_(self.notified[self.NOTIFIER_TERM]) |
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self.assertFalse(self.notified[self.NOTIFIER_NORM]) |
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self.assertEquals(self.notifiers[self.NOTIFIER_TERM].error_count, 0) |
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self.assertEquals(self.notifiers[self.NOTIFIER_NORM].error_count, 0) |
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def testEnableDisable(self): |
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self.ihandler[self.NOTIFIER_TERM].enable() |
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self.ihandler[self.NOTIFIER_TERM].disable() |
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self.ihandler[self.NOTIFIER_TERM].disable() |
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self.ihandler[self.NOTIFIER_TERM].enable() |
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self.ihandler[self.NOTIFIER_TERM].disable() |
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self.ihandler[self.NOTIFIER_TERM].enable() |
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utils.WriteFile(self.chk_files[self.NOTIFIER_TERM], data="dummy") |
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self.mainloop.Run()
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self.assert_(self.notified[self.NOTIFIER_TERM]) |
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self.assertFalse(self.notified[self.NOTIFIER_NORM]) |
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self.assertEquals(self.notifiers[self.NOTIFIER_TERM].error_count, 0) |
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self.assertEquals(self.notifiers[self.NOTIFIER_NORM].error_count, 0) |
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def testDoubleEnable(self): |
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self.ihandler[self.NOTIFIER_TERM].enable() |
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self.ihandler[self.NOTIFIER_TERM].enable() |
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utils.WriteFile(self.chk_files[self.NOTIFIER_TERM], data="dummy") |
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self.mainloop.Run()
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self.assert_(self.notified[self.NOTIFIER_TERM]) |
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self.assertFalse(self.notified[self.NOTIFIER_NORM]) |
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self.assertEquals(self.notifiers[self.NOTIFIER_TERM].error_count, 0) |
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self.assertEquals(self.notifiers[self.NOTIFIER_NORM].error_count, 0) |
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def testDefaultDisabled(self): |
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utils.WriteFile(self.chk_files[self.NOTIFIER_NORM], data="dummy") |
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utils.WriteFile(self.chk_files[self.NOTIFIER_TERM], data="dummy") |
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self.mainloop.Run()
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self.assert_(self.notified[self.NOTIFIER_TERM]) |
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# NORM notifier is disabled by default
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self.assertFalse(self.notified[self.NOTIFIER_NORM]) |
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self.assertEquals(self.notifiers[self.NOTIFIER_TERM].error_count, 0) |
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self.assertEquals(self.notifiers[self.NOTIFIER_NORM].error_count, 0) |
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def testBothEnabled(self): |
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self.ihandler[self.NOTIFIER_NORM].enable() |
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utils.WriteFile(self.chk_files[self.NOTIFIER_NORM], data="dummy") |
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utils.WriteFile(self.chk_files[self.NOTIFIER_TERM], data="dummy") |
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self.mainloop.Run()
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self.assert_(self.notified[self.NOTIFIER_TERM]) |
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self.assert_(self.notified[self.NOTIFIER_NORM]) |
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self.assertEquals(self.notifiers[self.NOTIFIER_TERM].error_count, 0) |
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self.assertEquals(self.notifiers[self.NOTIFIER_NORM].error_count, 0) |
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def testError(self): |
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self.ihandler[self.NOTIFIER_ERR].enable() |
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utils.WriteFile(self.chk_files[self.NOTIFIER_ERR], data="dummy") |
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self.assertRaises(errors.GenericError, self.mainloop.Run) |
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self.assert_(self.notified[self.NOTIFIER_ERR]) |
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self.assertEquals(self.notifiers[self.NOTIFIER_ERR].error_count, 1) |
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self.assertEquals(self.notifiers[self.NOTIFIER_NORM].error_count, 0) |
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self.assertEquals(self.notifiers[self.NOTIFIER_TERM].error_count, 0) |
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class TestSingleFileEventHandlerError(unittest.TestCase): |
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def setUp(self): |
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self.tmpdir = tempfile.mkdtemp()
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def tearDown(self): |
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shutil.rmtree(self.tmpdir)
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def test(self): |
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wm = pyinotify.WatchManager() |
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handler = asyncnotifier.SingleFileEventHandler(wm, None,
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utils.PathJoin(self.tmpdir,
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"nonexist"))
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self.assertRaises(errors.InotifyError, handler.enable)
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self.assertRaises(errors.InotifyError, handler.enable)
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handler.disable() |
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self.assertRaises(errors.InotifyError, handler.enable)
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if __name__ == "__main__": |
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testutils.GanetiTestProgram() |