root / test / ganeti.locking_unittest.py @ aaae9bc0
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#!/usr/bin/python
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#
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# Copyright (C) 2006, 2007 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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# 0.0510-1301, USA.
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"""Script for unittesting the locking module"""
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import os |
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import unittest |
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import time |
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import Queue |
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from ganeti import locking |
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from ganeti import errors |
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from threading import Thread |
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class TestSharedLock(unittest.TestCase): |
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"""SharedLock tests"""
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def setUp(self): |
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self.sl = locking.SharedLock()
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# helper threads use the 'done' queue to tell the master they finished.
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self.done = Queue.Queue(0) |
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def testSequenceAndOwnership(self): |
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self.assert_(not self.sl._is_owned()) |
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self.sl.acquire(shared=1) |
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self.assert_(self.sl._is_owned()) |
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self.assert_(self.sl._is_owned(shared=1)) |
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self.assert_(not self.sl._is_owned(shared=0)) |
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self.sl.release()
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self.assert_(not self.sl._is_owned()) |
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self.sl.acquire()
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self.assert_(self.sl._is_owned()) |
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self.assert_(not self.sl._is_owned(shared=1)) |
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self.assert_(self.sl._is_owned(shared=0)) |
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self.sl.release()
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self.assert_(not self.sl._is_owned()) |
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self.sl.acquire(shared=1) |
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self.assert_(self.sl._is_owned()) |
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self.assert_(self.sl._is_owned(shared=1)) |
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self.assert_(not self.sl._is_owned(shared=0)) |
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self.sl.release()
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self.assert_(not self.sl._is_owned()) |
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def testBooleanValue(self): |
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# semaphores are supposed to return a true value on a successful acquire
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self.assert_(self.sl.acquire(shared=1)) |
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self.sl.release()
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self.assert_(self.sl.acquire()) |
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self.sl.release()
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def testDoubleLockingStoE(self): |
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self.sl.acquire(shared=1) |
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self.assertRaises(AssertionError, self.sl.acquire) |
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def testDoubleLockingEtoS(self): |
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self.sl.acquire()
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self.assertRaises(AssertionError, self.sl.acquire, shared=1) |
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def testDoubleLockingStoS(self): |
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self.sl.acquire(shared=1) |
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self.assertRaises(AssertionError, self.sl.acquire, shared=1) |
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def testDoubleLockingEtoE(self): |
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self.sl.acquire()
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self.assertRaises(AssertionError, self.sl.acquire) |
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# helper functions: called in a separate thread they acquire the lock, send
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# their identifier on the done queue, then release it.
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def _doItSharer(self): |
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try:
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self.sl.acquire(shared=1) |
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self.done.put('SHR') |
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self.sl.release()
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except errors.LockError:
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self.done.put('ERR') |
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def _doItExclusive(self): |
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try:
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self.sl.acquire()
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self.done.put('EXC') |
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self.sl.release()
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except errors.LockError:
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self.done.put('ERR') |
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def _doItDelete(self): |
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try:
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self.sl.delete()
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self.done.put('DEL') |
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except errors.LockError:
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self.done.put('ERR') |
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def testSharersCanCoexist(self): |
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self.sl.acquire(shared=1) |
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Thread(target=self._doItSharer).start()
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self.assert_(self.done.get(True, 1)) |
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self.sl.release()
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def testExclusiveBlocksExclusive(self): |
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self.sl.acquire()
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Thread(target=self._doItExclusive).start()
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# give it a bit of time to check that it's not actually doing anything
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self.assertRaises(Queue.Empty, self.done.get, True, 0.2) |
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self.sl.release()
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self.assert_(self.done.get(True, 1)) |
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def testExclusiveBlocksDelete(self): |
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self.sl.acquire()
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Thread(target=self._doItDelete).start()
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# give it a bit of time to check that it's not actually doing anything
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self.assertRaises(Queue.Empty, self.done.get, True, 0.2) |
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self.sl.release()
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self.assert_(self.done.get(True, 1)) |
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def testExclusiveBlocksSharer(self): |
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self.sl.acquire()
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Thread(target=self._doItSharer).start()
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time.sleep(0.05)
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self.assertRaises(Queue.Empty, self.done.get, True, 0.2) |
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self.sl.release()
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self.assert_(self.done.get(True, 1)) |
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def testSharerBlocksExclusive(self): |
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self.sl.acquire(shared=1) |
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Thread(target=self._doItExclusive).start()
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time.sleep(0.05)
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self.assertRaises(Queue.Empty, self.done.get, True, 0.2) |
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self.sl.release()
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self.assert_(self.done.get(True, 1)) |
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def testSharerBlocksDelete(self): |
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self.sl.acquire(shared=1) |
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Thread(target=self._doItDelete).start()
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time.sleep(0.05)
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self.assertRaises(Queue.Empty, self.done.get, True, 0.2) |
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self.sl.release()
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self.assert_(self.done.get(True, 1)) |
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def testWaitingExclusiveBlocksSharer(self): |
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self.sl.acquire(shared=1) |
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# the lock is acquired in shared mode...
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Thread(target=self._doItExclusive).start()
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# ...but now an exclusive is waiting...
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time.sleep(0.05)
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Thread(target=self._doItSharer).start()
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# ...so the sharer should be blocked as well
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self.assertRaises(Queue.Empty, self.done.get, True, 0.2) |
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self.sl.release()
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# The exclusive passed before
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self.assertEqual(self.done.get(True, 1), 'EXC') |
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self.assertEqual(self.done.get(True, 1), 'SHR') |
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def testWaitingSharerBlocksExclusive(self): |
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self.sl.acquire()
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# the lock is acquired in exclusive mode...
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Thread(target=self._doItSharer).start()
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# ...but now a sharer is waiting...
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time.sleep(0.05)
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Thread(target=self._doItExclusive).start()
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# ...the exclusive is waiting too...
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self.assertRaises(Queue.Empty, self.done.get, True, 0.2) |
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self.sl.release()
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# The sharer passed before
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self.assertEqual(self.done.get(True, 1), 'SHR') |
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self.assertEqual(self.done.get(True, 1), 'EXC') |
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def testNoNonBlocking(self): |
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self.assertRaises(NotImplementedError, self.sl.acquire, blocking=0) |
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self.assertRaises(NotImplementedError, self.sl.delete, blocking=0) |
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self.sl.acquire()
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self.sl.delete(blocking=0) # Fine, because the lock is already acquired |
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def testDelete(self): |
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self.sl.delete()
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self.assertRaises(errors.LockError, self.sl.acquire) |
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self.assertRaises(errors.LockError, self.sl.acquire, shared=1) |
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self.assertRaises(errors.LockError, self.sl.delete) |
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def testNoDeleteIfSharer(self): |
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self.sl.acquire(shared=1) |
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self.assertRaises(AssertionError, self.sl.delete) |
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def testDeletePendingSharersExclusiveDelete(self): |
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self.sl.acquire()
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Thread(target=self._doItSharer).start()
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Thread(target=self._doItSharer).start()
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time.sleep(0.05)
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Thread(target=self._doItExclusive).start()
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Thread(target=self._doItDelete).start()
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time.sleep(0.05)
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self.sl.delete()
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# The two threads who were pending return both ERR
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self.assertEqual(self.done.get(True, 1), 'ERR') |
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self.assertEqual(self.done.get(True, 1), 'ERR') |
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self.assertEqual(self.done.get(True, 1), 'ERR') |
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self.assertEqual(self.done.get(True, 1), 'ERR') |
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def testDeletePendingDeleteExclusiveSharers(self): |
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self.sl.acquire()
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Thread(target=self._doItDelete).start()
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Thread(target=self._doItExclusive).start()
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time.sleep(0.05)
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Thread(target=self._doItSharer).start()
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Thread(target=self._doItSharer).start()
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time.sleep(0.05)
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self.sl.delete()
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# The two threads who were pending return both ERR
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self.assertEqual(self.done.get(True, 1), 'ERR') |
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self.assertEqual(self.done.get(True, 1), 'ERR') |
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self.assertEqual(self.done.get(True, 1), 'ERR') |
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self.assertEqual(self.done.get(True, 1), 'ERR') |
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class TestLockSet(unittest.TestCase): |
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"""LockSet tests"""
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def setUp(self): |
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self.resources = ['one', 'two', 'three'] |
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self.ls = locking.LockSet(self.resources) |
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# helper threads use the 'done' queue to tell the master they finished.
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self.done = Queue.Queue(0) |
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def testResources(self): |
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self.assertEquals(self.ls._names(), set(self.resources)) |
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newls = locking.LockSet() |
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self.assertEquals(newls._names(), set()) |
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def testAcquireRelease(self): |
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self.ls.acquire('one') |
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self.assertEquals(self.ls._list_owned(), set(['one'])) |
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self.ls.release()
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self.assertEquals(self.ls._list_owned(), set()) |
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self.ls.acquire(['one']) |
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self.assertEquals(self.ls._list_owned(), set(['one'])) |
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self.ls.release()
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self.assertEquals(self.ls._list_owned(), set()) |
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self.ls.acquire(['one', 'two', 'three']) |
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self.assertEquals(self.ls._list_owned(), set(['one', 'two', 'three'])) |
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self.ls.release('one') |
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self.assertEquals(self.ls._list_owned(), set(['two', 'three'])) |
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self.ls.release(['three']) |
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self.assertEquals(self.ls._list_owned(), set(['two'])) |
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self.ls.release()
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self.assertEquals(self.ls._list_owned(), set()) |
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self.ls.acquire(['one', 'three']) |
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self.assertEquals(self.ls._list_owned(), set(['one', 'three'])) |
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self.ls.release()
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self.assertEquals(self.ls._list_owned(), set()) |
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def testNoDoubleAcquire(self): |
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self.ls.acquire('one') |
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self.assertRaises(AssertionError, self.ls.acquire, 'one') |
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self.assertRaises(AssertionError, self.ls.acquire, ['two']) |
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self.assertRaises(AssertionError, self.ls.acquire, ['two', 'three']) |
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self.ls.release()
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self.ls.acquire(['one', 'three']) |
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self.ls.release('one') |
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self.assertRaises(AssertionError, self.ls.acquire, ['two']) |
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self.ls.release('three') |
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def testNoWrongRelease(self): |
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self.assertRaises(AssertionError, self.ls.release) |
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self.ls.acquire('one') |
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self.assertRaises(AssertionError, self.ls.release, 'two') |
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def testAddRemove(self): |
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self.ls.add('four') |
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self.assertEquals(self.ls._list_owned(), set()) |
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self.assert_('four' in self.ls._names()) |
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self.ls.add(['five', 'six', 'seven'], acquired=1) |
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self.assert_('five' in self.ls._names()) |
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self.assert_('six' in self.ls._names()) |
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self.assert_('seven' in self.ls._names()) |
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self.assertEquals(self.ls._list_owned(), set(['five', 'six', 'seven'])) |
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self.ls.remove(['five', 'six']) |
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self.assert_('five' not in self.ls._names()) |
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self.assert_('six' not in self.ls._names()) |
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self.assertEquals(self.ls._list_owned(), set(['seven'])) |
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self.ls.add('eight', acquired=1, shared=1) |
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self.assert_('eight' in self.ls._names()) |
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self.assertEquals(self.ls._list_owned(), set(['seven', 'eight'])) |
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self.ls.remove('seven') |
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self.assert_('seven' not in self.ls._names()) |
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self.assertEquals(self.ls._list_owned(), set(['eight'])) |
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self.ls.release()
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self.ls.remove(['two']) |
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self.assert_('two' not in self.ls._names()) |
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self.ls.acquire('three') |
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self.ls.remove(['three']) |
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self.assert_('three' not in self.ls._names()) |
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self.assertEquals(self.ls.remove('three'), ['three']) |
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self.assertEquals(self.ls.remove(['one', 'three', 'six']), ['three', 'six']) |
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self.assert_('one' not in self.ls._names()) |
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def testRemoveNonBlocking(self): |
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self.assertRaises(NotImplementedError, self.ls.remove, 'one', blocking=0) |
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self.ls.acquire('one') |
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self.assertEquals(self.ls.remove('one', blocking=0), []) |
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self.ls.acquire(['two', 'three']) |
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self.assertEquals(self.ls.remove(['two', 'three'], blocking=0), []) |
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def testNoDoubleAdd(self): |
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self.assertRaises(errors.LockError, self.ls.add, 'two') |
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self.ls.add('four') |
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self.assertRaises(errors.LockError, self.ls.add, 'four') |
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def testNoWrongRemoves(self): |
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self.ls.acquire(['one', 'three'], shared=1) |
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# Cannot remove 'two' while holding something which is not a superset
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self.assertRaises(AssertionError, self.ls.remove, 'two') |
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# Cannot remove 'three' as we are sharing it
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self.assertRaises(AssertionError, self.ls.remove, 'three') |
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def _doLockSet(self, set, shared): |
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try:
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self.ls.acquire(set, shared=shared) |
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self.done.put('DONE') |
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self.ls.release()
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except errors.LockError:
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self.done.put('ERR') |
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def _doRemoveSet(self, set): |
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self.done.put(self.ls.remove(set)) |
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def testConcurrentSharedAcquire(self): |
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self.ls.acquire(['one', 'two'], shared=1) |
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Thread(target=self._doLockSet, args=(['one', 'two'], 1)).start() |
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self.assertEqual(self.done.get(True, 1), 'DONE') |
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Thread(target=self._doLockSet, args=(['one', 'two', 'three'], 1)).start() |
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self.assertEqual(self.done.get(True, 1), 'DONE') |
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Thread(target=self._doLockSet, args=('three', 1)).start() |
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self.assertEqual(self.done.get(True, 1), 'DONE') |
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Thread(target=self._doLockSet, args=(['one', 'two'], 0)).start() |
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Thread(target=self._doLockSet, args=(['two', 'three'], 0)).start() |
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self.assertRaises(Queue.Empty, self.done.get, True, 0.2) |
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self.ls.release()
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self.assertEqual(self.done.get(True, 1), 'DONE') |
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self.assertEqual(self.done.get(True, 1), 'DONE') |
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def testConcurrentExclusiveAcquire(self): |
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self.ls.acquire(['one', 'two']) |
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Thread(target=self._doLockSet, args=('three', 1)).start() |
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self.assertEqual(self.done.get(True, 1), 'DONE') |
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Thread(target=self._doLockSet, args=('three', 0)).start() |
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self.assertEqual(self.done.get(True, 1), 'DONE') |
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Thread(target=self._doLockSet, args=(['one', 'two'], 0)).start() |
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Thread(target=self._doLockSet, args=(['one', 'two'], 1)).start() |
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Thread(target=self._doLockSet, args=('one', 0)).start() |
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Thread(target=self._doLockSet, args=('one', 1)).start() |
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Thread(target=self._doLockSet, args=(['two', 'three'], 0)).start() |
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Thread(target=self._doLockSet, args=(['two', 'three'], 1)).start() |
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self.assertRaises(Queue.Empty, self.done.get, True, 0.2) |
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self.ls.release()
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self.assertEqual(self.done.get(True, 1), 'DONE') |
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self.assertEqual(self.done.get(True, 1), 'DONE') |
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self.assertEqual(self.done.get(True, 1), 'DONE') |
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self.assertEqual(self.done.get(True, 1), 'DONE') |
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self.assertEqual(self.done.get(True, 1), 'DONE') |
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self.assertEqual(self.done.get(True, 1), 'DONE') |
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def testConcurrentRemove(self): |
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self.ls.add('four') |
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self.ls.acquire(['one', 'two', 'four']) |
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Thread(target=self._doLockSet, args=(['one', 'four'], 0)).start() |
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Thread(target=self._doLockSet, args=(['one', 'four'], 1)).start() |
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Thread(target=self._doLockSet, args=(['one', 'two'], 0)).start() |
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Thread(target=self._doLockSet, args=(['one', 'two'], 1)).start() |
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self.assertRaises(Queue.Empty, self.done.get, True, 0.2) |
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self.ls.remove('one') |
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self.ls.release()
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self.assertEqual(self.done.get(True, 1), 'ERR') |
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self.assertEqual(self.done.get(True, 1), 'ERR') |
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self.assertEqual(self.done.get(True, 1), 'ERR') |
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self.assertEqual(self.done.get(True, 1), 'ERR') |
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self.ls.add(['five', 'six'], acquired=1) |
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Thread(target=self._doLockSet, args=(['three', 'six'], 1)).start() |
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Thread(target=self._doLockSet, args=(['three', 'six'], 0)).start() |
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Thread(target=self._doLockSet, args=(['four', 'six'], 1)).start() |
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Thread(target=self._doLockSet, args=(['four', 'six'], 0)).start() |
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self.ls.remove('five') |
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self.ls.release()
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self.assertEqual(self.done.get(True, 1), 'DONE') |
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self.assertEqual(self.done.get(True, 1), 'DONE') |
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self.assertEqual(self.done.get(True, 1), 'DONE') |
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self.assertEqual(self.done.get(True, 1), 'DONE') |
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self.ls.acquire(['three', 'four']) |
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Thread(target=self._doRemoveSet, args=(['four', 'six'], )).start() |
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self.assertRaises(Queue.Empty, self.done.get, True, 0.2) |
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self.ls.remove('four') |
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self.assertEqual(self.done.get(True, 1), ['four']) |
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Thread(target=self._doRemoveSet, args=(['two'])).start() |
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self.assertEqual(self.done.get(True, 1), []) |
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self.ls.release()
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|
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|
| 415 |
if __name__ == '__main__': |
| 416 |
unittest.main() |
| 417 |
#suite = unittest.TestLoader().loadTestsFromTestCase(TestSharedLock)
|
| 418 |
#unittest.TextTestRunner(verbosity=2).run(suite)
|