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  • Committer: Aaron Bentley
  • Date: 2008-11-15 19:59:29 UTC
  • mto: This revision was merged to the branch mainline in revision 3838.
  • Revision ID: aaron@aaronbentley.com-20081115195929-2w9zzm3f9vi39f2q
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bzrlib/tests/test_atomicfile.py
 
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# Copyright (C) 2006 Canonical Ltd
 
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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,
 
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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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#
 
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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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"""Basic tests for AtomicFile"""
 
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import os
 
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import stat
 
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import sys
 
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from bzrlib import (
 
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    atomicfile,
 
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    errors,
 
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    osutils,
 
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    symbol_versioning,
 
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    )
 
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from bzrlib.tests import TestCaseInTempDir, TestSkipped
 
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class TestAtomicFile(TestCaseInTempDir):
 
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    def test_commit(self):
 
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        f = atomicfile.AtomicFile('test')
 
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        self.failIfExists('test')
 
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        f.write('foo\n')
 
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        f.commit()
 
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        self.assertEqual(['test'], os.listdir('.'))
 
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        self.check_file_contents('test', 'foo\n')
 
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        self.assertRaises(errors.AtomicFileAlreadyClosed, f.commit)
 
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        self.assertRaises(errors.AtomicFileAlreadyClosed, f.abort)
 
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        # close is re-entrant safe
 
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        f.close()
 
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    def test_abort(self):
 
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        f = atomicfile.AtomicFile('test')
 
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        f.write('foo\n')
 
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        f.abort()
 
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        self.assertEqual([], os.listdir('.'))
 
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        self.assertRaises(errors.AtomicFileAlreadyClosed, f.abort)
 
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        self.assertRaises(errors.AtomicFileAlreadyClosed, f.commit)
 
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        # close is re-entrant safe
 
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        f.close()
 
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    def test_close(self):
 
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        f = atomicfile.AtomicFile('test')
 
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        f.write('foo\n')
 
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        # close on an open file is an abort
 
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        f.close()
 
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        self.assertEqual([], os.listdir('.'))
 
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        self.assertRaises(errors.AtomicFileAlreadyClosed, f.abort)
 
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        self.assertRaises(errors.AtomicFileAlreadyClosed, f.commit)
 
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        # close is re-entrant safe
 
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        f.close()
 
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    def test_text_mode(self):
 
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        f = atomicfile.AtomicFile('test', mode='wt')
 
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        f.write('foo\n')
 
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        f.commit()
 
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        contents = open('test', 'rb').read()
 
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        if sys.platform == 'win32':
 
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            self.assertEqual('foo\r\n', contents)
 
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        else:
 
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            self.assertEqual('foo\n', contents)
 
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    def can_sys_preserve_mode(self):
 
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        # PLATFORM DEFICIENCY/ TestSkipped
 
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        return sys.platform not in ('win32',)
 
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    def _test_mode(self, mode):
 
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        if not self.can_sys_preserve_mode():
 
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            raise TestSkipped("This test cannot be run on your platform")
 
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        f = atomicfile.AtomicFile('test', mode='wb', new_mode=mode)
 
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        f.write('foo\n')
 
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        f.commit()
 
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        st = os.lstat('test')
 
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        self.assertEqualMode(mode, stat.S_IMODE(st.st_mode))
 
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    def test_mode_0666(self):
 
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        self._test_mode(0666)
 
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    def test_mode_0664(self):
 
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        self._test_mode(0664)
 
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    def test_mode_0660(self):
 
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        self._test_mode(0660)
 
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    def test_mode_0660(self):
 
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        self._test_mode(0660)
 
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    def test_mode_0640(self):
 
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        self._test_mode(0640)
 
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    def test_mode_0600(self):
 
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        self._test_mode(0600)
 
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    def test_mode_0400(self):
 
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        self._test_mode(0400)
 
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        # Make it read-write again so cleanup doesn't complain
 
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        os.chmod('test', 0600)
 
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    def test_no_mode(self):
 
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        # The default file permissions should be based on umask
 
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        umask = osutils.get_umask()
 
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        f = atomicfile.AtomicFile('test', mode='wb')
 
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        f.write('foo\n')
 
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        f.commit()
 
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        st = os.lstat('test')
 
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        self.assertEqualMode(0666 & ~umask, stat.S_IMODE(st.st_mode))
 
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    def test_closed(self):
 
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        local_warnings = []
 
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        def capture_warnings(msg, cls, stacklevel=None):
 
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            self.assertEqual(cls, DeprecationWarning)
 
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            local_warnings.append(msg)
 
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        method = symbol_versioning.warn
 
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        try:
 
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            symbol_versioning.set_warning_method(capture_warnings)
 
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            f = atomicfile.AtomicFile('test', mode='wb')
 
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            self.assertEqual(False, f.closed)
 
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            f.abort()
 
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            self.assertEqual(True, f.closed)
 
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            f = atomicfile.AtomicFile('test', mode='wb')
 
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            f.close()
 
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            self.assertEqual(True, f.closed)
 
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            f = atomicfile.AtomicFile('test', mode='wb')
 
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            f.commit()
 
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            self.assertEqual(True, f.closed)
 
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        finally:
 
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            symbol_versioning.set_warning_method(method)
 
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        txt = 'AtomicFile.closed deprecated in bzr 0.10'
 
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        self.assertEqual([txt]*4, local_warnings)