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 * The internal storage of history, and logical branch identity have now
   been split into Branch, and Repository. The common locking and file 
   management routines are now in bzrlib.lockablefiles. 
   (Aaron Bentley, Robert Collins, Martin Pool)

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bzrlib/tests/test_lockable_files.py
 
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# Copyright (C) 2005 by Canonical Ltd
 
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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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# This program is distributed in the hope that it will be useful,
 
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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# GNU General Public License for more details.
 
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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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
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from StringIO import StringIO
 
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from bzrlib.branch import Branch
 
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from bzrlib.errors import BzrBadParameterNotString, NoSuchFile, ReadOnlyError
 
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from bzrlib.lockable_files import LockableFiles
 
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from bzrlib.tests import TestCaseInTempDir
 
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from bzrlib.transactions import PassThroughTransaction, ReadOnlyTransaction
 
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from bzrlib.transport import get_transport
 
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class TestLockableFiles(TestCaseInTempDir):
 
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    def setUp(self):
 
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        super(TestLockableFiles, self).setUp()
 
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        transport = get_transport('.')
 
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        transport.mkdir('.bzr')
 
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        transport.put('.bzr/my-lock', StringIO(''))
 
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        self.lockable = LockableFiles(transport.clone('.bzr'), 'my-lock')
 
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    def test_read_write(self):
 
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        self.assertRaises(NoSuchFile, self.lockable.get, 'foo')
 
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        self.assertRaises(NoSuchFile, self.lockable.get_utf8, 'foo')
 
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        self.lockable.lock_write()
 
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        try:
 
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            unicode_string = u'bar\u1234'
 
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            self.assertEqual(4, len(unicode_string))
 
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            byte_string = unicode_string.encode('utf-8')
 
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            self.assertEqual(6, len(byte_string))
 
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            self.assertRaises(UnicodeEncodeError, self.lockable.put, 'foo', 
 
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                              StringIO(unicode_string))
 
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            self.lockable.put('foo', StringIO(byte_string))
 
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            self.assertEqual(byte_string,
 
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                             self.lockable.get('foo').read())
 
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            self.assertEqual(unicode_string,
 
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                             self.lockable.get_utf8('foo').read())
 
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            self.assertRaises(BzrBadParameterNotString,
 
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                              self.lockable.put_utf8,
 
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                              'bar',
 
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                              StringIO(unicode_string)
 
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                              )
 
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            self.lockable.put_utf8('bar', unicode_string)
 
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            self.assertEqual(unicode_string, 
 
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                             self.lockable.get_utf8('bar').read())
 
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            self.assertEqual(byte_string, 
 
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                             self.lockable.get('bar').read())
 
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        finally:
 
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            self.lockable.unlock()
 
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    def test_locks(self):
 
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        self.lockable.lock_read()
 
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        try:
 
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            self.assertRaises(ReadOnlyError, self.lockable.put, 'foo', 
 
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                              StringIO('bar\u1234'))
 
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        finally:
 
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            self.lockable.unlock()
 
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    def test_transactions(self):
 
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        self.assertIs(self.lockable.get_transaction().__class__,
 
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                      PassThroughTransaction)
 
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        self.lockable.lock_read()
 
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        try:
 
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            self.assertIs(self.lockable.get_transaction().__class__,
 
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                          ReadOnlyTransaction)
 
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        finally:
 
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            self.lockable.unlock()
 
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        self.assertIs(self.lockable.get_transaction().__class__,
 
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                      PassThroughTransaction)
 
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        self.lockable.lock_write()
 
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        self.assertIs(self.lockable.get_transaction().__class__,
 
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                      PassThroughTransaction)
 
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        self.lockable.unlock()
 
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    def test__escape(self):
 
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        self.assertEqual('%25', self.lockable._escape('%'))
 
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    def test__escape_empty(self):
 
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        self.assertEqual('', self.lockable._escape(''))
 
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