~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2005, 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

from StringIO import StringIO

import bzrlib

from bzrlib.branch import Branch

import bzrlib.errors as errors

from bzrlib.errors import BzrBadParameterNotString, NoSuchFile, ReadOnlyError

from bzrlib.lockable_files import LockableFiles, TransportLock

from bzrlib.lockdir import LockDir

from bzrlib.tests import TestCaseInTempDir

from bzrlib.tests.test_transactions import DummyWeave

from bzrlib.transactions import (PassThroughTransaction,

                                 ReadOnlyTransaction,

                                 WriteTransaction,

                                 )

from bzrlib.transport import get_transport

# these tests are applied in each parameterized suite for LockableFiles

class _TestLockableFiles_mixin(object):

    def test_read_write(self):

        self.assertRaises(NoSuchFile, self.lockable.get, 'foo')

        self.assertRaises(NoSuchFile, self.lockable.get_utf8, 'foo')

        self.lockable.lock_write()

        try:

            unicode_string = u'bar\u1234'

            self.assertEqual(4, len(unicode_string))

            byte_string = unicode_string.encode('utf-8')

            self.assertEqual(6, len(byte_string))

            self.assertRaises(UnicodeEncodeError, self.lockable.put, 'foo', 

                              StringIO(unicode_string))

            self.lockable.put('foo', StringIO(byte_string))

            self.assertEqual(byte_string,

                             self.lockable.get('foo').read())

            self.assertEqual(unicode_string,

                             self.lockable.get_utf8('foo').read())

            self.assertRaises(BzrBadParameterNotString,

                              self.lockable.put_utf8,

                              'bar',

                              StringIO(unicode_string)

                              )

            self.lockable.put_utf8('bar', unicode_string)

            self.assertEqual(unicode_string,

                             self.lockable.get_utf8('bar').read())

            self.assertEqual(byte_string,

                             self.lockable.get('bar').read())

            self.lockable.put_bytes('raw', 'raw\xffbytes')

            self.assertEqual('raw\xffbytes',

                             self.lockable.get('raw').read())

        finally:

            self.lockable.unlock()

    def test_locks(self):

        self.lockable.lock_read()

        try:

            self.assertRaises(ReadOnlyError, self.lockable.put, 'foo', 

                              StringIO('bar\u1234'))

        finally:

            self.lockable.unlock()

    def test_transactions(self):

        self.assertIs(self.lockable.get_transaction().__class__,

                      PassThroughTransaction)

        self.lockable.lock_read()

        try:

            self.assertIs(self.lockable.get_transaction().__class__,

                          ReadOnlyTransaction)

        finally:

            self.lockable.unlock()

        self.assertIs(self.lockable.get_transaction().__class__,

                      PassThroughTransaction)

        self.lockable.lock_write()

        self.assertIs(self.lockable.get_transaction().__class__,

                      WriteTransaction)

        # check that finish is called:

        vf = DummyWeave('a')

        self.lockable.get_transaction().register_dirty(vf)

        self.lockable.unlock()

        self.assertTrue(vf.finished)

    def test__escape(self):

        self.assertEqual('%25', self.lockable._escape('%'))

    def test__escape_empty(self):

        self.assertEqual('', self.lockable._escape(''))

    def test_break_lock(self):

        # some locks are not breakable

        self.lockable.lock_write()

        try:

            self.assertRaises(AssertionError, self.lockable.break_lock)

        except NotImplementedError:

            # this lock cannot be broken

            self.lockable.unlock()

            return

        l2 = self.get_lockable()

        orig_factory = bzrlib.ui.ui_factory

        # silent ui - no need for stdout

        bzrlib.ui.ui_factory = bzrlib.ui.SilentUIFactory()

        bzrlib.ui.ui_factory.stdin = StringIO("y\n")

        try:

            l2.break_lock()

        finally:

            bzrlib.ui.ui_factory = orig_factory

        try:

            l2.lock_write()

            l2.unlock()

        finally:

            self.assertRaises(errors.LockBroken, self.lockable.unlock)

            self.assertFalse(self.lockable.is_locked())

# This method of adapting tests to parameters is different to 

# the TestProviderAdapters used elsewhere, but seems simpler for this 

# case.  

class TestLockableFiles_TransportLock(TestCaseInTempDir,

                                      _TestLockableFiles_mixin):

    def setUp(self):

        super(TestLockableFiles_TransportLock, self).setUp()

        transport = get_transport('.')

        transport.mkdir('.bzr')

        self.sub_transport = transport.clone('.bzr')

        self.lockable = self.get_lockable()

        self.lockable.create_lock()

    def tearDown(self):

        super(TestLockableFiles_TransportLock, self).tearDown()

        # free the subtransport so that we do not get a 5 second

        # timeout due to the SFTP connection cache.

        del self.sub_transport

    def get_lockable(self):

        return LockableFiles(self.sub_transport, 'my-lock', TransportLock)

class TestLockableFiles_LockDir(TestCaseInTempDir,

                              _TestLockableFiles_mixin):

    """LockableFile tests run with LockDir underneath"""

    def setUp(self):

        super(TestLockableFiles_LockDir, self).setUp()

        self.transport = get_transport('.')

        self.lockable = self.get_lockable()

        # the lock creation here sets mode - test_permissions on branch 

        # tests that implicitly, but it might be a good idea to factor 

        # out the mode checking logic and have it applied to loackable files

        # directly. RBC 20060418

        self.lockable.create_lock()

    def get_lockable(self):

        return LockableFiles(self.transport, 'my-lock', LockDir)

    def test_lock_created(self):

        self.assertTrue(self.transport.has('my-lock'))

        self.lockable.lock_write()

        self.assertTrue(self.transport.has('my-lock/held/info'))

        self.lockable.unlock()

        self.assertFalse(self.transport.has('my-lock/held/info'))

        self.assertTrue(self.transport.has('my-lock'))

    # TODO: Test the lockdir inherits the right file and directory permissions

    # from the LockableFiles.