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Viewing changes to bzrlib/tests/test_atomicfile.py

  • Committer: Ian Clatworthy
  • Date: 2009-03-02 06:35:43 UTC
  • mto: (0.23.30 groupcompress_rabin)
  • mto: This revision was merged to the branch mainline in revision 4280.
  • Revision ID: ian.clatworthy@canonical.com-20090302063543-czciz25uppelwhv0
groupcompress.py code cleanups

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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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 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)