# Copyright (C) 2006 Canonical Ltd # # This program is free software; you can redistribute it and/or modify # it under the terms of the GNU General Public License as published by # the Free Software Foundation; either version 2 of the License, or # (at your option) any later version. # # This program is distributed in the hope that it will be useful, # but WITHOUT ANY WARRANTY; without even the implied warranty of # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the # GNU General Public License for more details. # # You should have received a copy of the GNU General Public License # along with this program; if not, write to the Free Software # Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA """Test locks across all branch implemenations""" from bzrlib.tests.branch_implementations.test_branch import TestCaseWithBranch from bzrlib.tests.lock_helpers import TestPreventLocking, LockWrapper class TestBranchLocking(TestCaseWithBranch): def get_instrumented_branch(self): """Get a Branch object which has been instrumented""" # TODO: jam 20060630 It may be that not all formats have a # 'control_files' member. So we should fail gracefully if # not there. But assuming it has them lets us test the exact # lock/unlock order. self.locks = [] b = LockWrapper(self.locks, self.get_branch(), 'b') b.repository = LockWrapper(self.locks, b.repository, 'r') bcf = b.control_files rcf = b.repository.control_files # Look out for branch types that reuse their control files self.combined_control = bcf is rcf b.control_files = LockWrapper(self.locks, b.control_files, 'bc') b.repository.control_files = \ LockWrapper(self.locks, b.repository.control_files, 'rc') return b def test_01_lock_read(self): # Test that locking occurs in the correct order b = self.get_instrumented_branch() self.assertFalse(b.is_locked()) self.assertFalse(b.repository.is_locked()) b.lock_read() try: self.assertTrue(b.is_locked()) self.assertTrue(b.repository.is_locked()) finally: b.unlock() self.assertFalse(b.is_locked()) self.assertFalse(b.repository.is_locked()) self.assertEqual([('b', 'lr', True), ('r', 'lr', True), ('rc', 'lr', True), ('bc', 'lr', True), ('b', 'ul', True), ('bc', 'ul', True), ('r', 'ul', True), ('rc', 'ul', True), ], self.locks) def test_02_lock_write(self): # Test that locking occurs in the correct order b = self.get_instrumented_branch() self.assertFalse(b.is_locked()) self.assertFalse(b.repository.is_locked()) b.lock_write() try: self.assertTrue(b.is_locked()) self.assertTrue(b.repository.is_locked()) finally: b.unlock() self.assertFalse(b.is_locked()) self.assertFalse(b.repository.is_locked()) self.assertEqual([('b', 'lw', True), ('r', 'lw', True), ('rc', 'lw', True), ('bc', 'lw', True), ('b', 'ul', True), ('bc', 'ul', True), ('r', 'ul', True), ('rc', 'ul', True), ], self.locks) def test_03_lock_fail_unlock_repo(self): # Make sure branch.unlock() is called, even if there is a # failure while unlocking the repository. b = self.get_instrumented_branch() b.repository.disable_unlock() self.assertFalse(b.is_locked()) self.assertFalse(b.repository.is_locked()) b.lock_write() try: self.assertTrue(b.is_locked()) self.assertTrue(b.repository.is_locked()) self.assertRaises(TestPreventLocking, b.unlock) if self.combined_control: self.assertTrue(b.is_locked()) else: self.assertFalse(b.is_locked()) self.assertTrue(b.repository.is_locked()) # We unlock the branch control files, even if # we fail to unlock the repository self.assertEqual([('b', 'lw', True), ('r', 'lw', True), ('rc', 'lw', True), ('bc', 'lw', True), ('b', 'ul', True), ('bc', 'ul', True), ('r', 'ul', False), ], self.locks) finally: # For cleanup purposes, make sure we are unlocked b.repository._other.unlock() def test_04_lock_fail_unlock_control(self): # Make sure repository.unlock() is called, if we fail to unlock self b = self.get_instrumented_branch() b.control_files.disable_unlock() self.assertFalse(b.is_locked()) self.assertFalse(b.repository.is_locked()) b.lock_write() try: self.assertTrue(b.is_locked()) self.assertTrue(b.repository.is_locked()) self.assertRaises(TestPreventLocking, b.unlock) self.assertTrue(b.is_locked()) if self.combined_control: self.assertTrue(b.repository.is_locked()) else: self.assertFalse(b.repository.is_locked()) # We unlock the repository even if # we fail to unlock the control files self.assertEqual([('b', 'lw', True), ('r', 'lw', True), ('rc', 'lw', True), ('bc', 'lw', True), ('b', 'ul', True), ('bc', 'ul', False), ('r', 'ul', True), ('rc', 'ul', True), ], self.locks) finally: # For cleanup purposes, make sure we are unlocked b.control_files._other.unlock() def test_05_lock_read_fail_repo(self): # Test that the branch is not locked if it cannot lock the repository b = self.get_instrumented_branch() b.repository.disable_lock_read() self.assertRaises(TestPreventLocking, b.lock_read) self.assertFalse(b.is_locked()) self.assertFalse(b.repository.is_locked()) self.assertEqual([('b', 'lr', True), ('r', 'lr', False), ], self.locks) def test_06_lock_write_fail_repo(self): # Test that the branch is not locked if it cannot lock the repository b = self.get_instrumented_branch() b.repository.disable_lock_write() self.assertRaises(TestPreventLocking, b.lock_write) self.assertFalse(b.is_locked()) self.assertFalse(b.repository.is_locked()) self.assertEqual([('b', 'lw', True), ('r', 'lw', False), ], self.locks) def test_07_lock_read_fail_control(self): # Test the repository is unlocked if we can't lock self b = self.get_instrumented_branch() b.control_files.disable_lock_read() self.assertRaises(TestPreventLocking, b.lock_read) self.assertFalse(b.is_locked()) self.assertFalse(b.repository.is_locked()) self.assertEqual([('b', 'lr', True), ('r', 'lr', True), ('rc', 'lr', True), ('bc', 'lr', False), ('r', 'ul', True), ('rc', 'ul', True), ], self.locks) def test_08_lock_write_fail_control(self): # Test the repository is unlocked if we can't lock self b = self.get_instrumented_branch() b.control_files.disable_lock_write() self.assertRaises(TestPreventLocking, b.lock_write) self.assertFalse(b.is_locked()) self.assertFalse(b.repository.is_locked()) self.assertEqual([('b', 'lw', True), ('r', 'lw', True), ('rc', 'lw', True), ('bc', 'lw', False), ('r', 'ul', True), ('rc', 'ul', True), ], self.locks)