~bzr-pqm/bzr/bzr.dev

# 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

"""Basic tests for AtomicFile"""

import os

import stat

import sys

from bzrlib import (

    atomicfile,

    errors,

    osutils,

    symbol_versioning,

    )

from bzrlib.tests import TestCaseInTempDir, TestSkipped

class TestAtomicFile(TestCaseInTempDir):

    def test_commit(self):

        f = atomicfile.AtomicFile('test')

        self.failIfExists('test')

        f.write('foo\n')

        f.commit()

        self.assertEqual(['test'], os.listdir('.'))

        self.check_file_contents('test', 'foo\n')

        self.assertRaises(errors.AtomicFileAlreadyClosed, f.commit)

        self.assertRaises(errors.AtomicFileAlreadyClosed, f.abort)

        # close is re-entrant safe

        f.close()

    def test_abort(self):

        f = atomicfile.AtomicFile('test')

        f.write('foo\n')

        f.abort()

        self.assertEqual([], os.listdir('.'))

        self.assertRaises(errors.AtomicFileAlreadyClosed, f.abort)

        self.assertRaises(errors.AtomicFileAlreadyClosed, f.commit)

        # close is re-entrant safe

        f.close()

    def test_close(self):

        f = atomicfile.AtomicFile('test')

        f.write('foo\n')

        # close on an open file is an abort

        f.close()

        self.assertEqual([], os.listdir('.'))

        self.assertRaises(errors.AtomicFileAlreadyClosed, f.abort)

        self.assertRaises(errors.AtomicFileAlreadyClosed, f.commit)

        # close is re-entrant safe

        f.close()

    def test_text_mode(self):

        f = atomicfile.AtomicFile('test', mode='wt')

        f.write('foo\n')

        f.commit()

        contents = open('test', 'rb').read()

        if sys.platform == 'win32':

            self.assertEqual('foo\r\n', contents)

        else:

            self.assertEqual('foo\n', contents)

    def can_sys_preserve_mode(self):

        # PLATFORM DEFICIENCY/ TestSkipped

        return sys.platform not in ('win32',)

    def _test_mode(self, mode):

        if not self.can_sys_preserve_mode():

            raise TestSkipped("This test cannot be run on your platform")

        f = atomicfile.AtomicFile('test', mode='wb', new_mode=mode)

        f.write('foo\n')

        f.commit()

        st = os.lstat('test')

        self.assertEqualMode(mode, stat.S_IMODE(st.st_mode))

    def test_mode_0666(self):

        self._test_mode(0666)

    def test_mode_0664(self):

        self._test_mode(0664)

    def test_mode_0660(self):

        self._test_mode(0660)

    def test_mode_0660(self):

        self._test_mode(0660)

    def test_mode_0640(self):

        self._test_mode(0640)

    def test_mode_0600(self):

        self._test_mode(0600)

    def test_mode_0400(self):

        self._test_mode(0400)

        # Make it read-write again so cleanup doesn't complain

        os.chmod('test', 0600)

    def test_no_mode(self):

        # The default file permissions should be based on umask

        umask = osutils.get_umask()

        f = atomicfile.AtomicFile('test', mode='wb')

        f.write('foo\n')

        f.commit()

        st = os.lstat('test')

        self.assertEqualMode(0666 & ~umask, stat.S_IMODE(st.st_mode))

    def test_closed(self):

        local_warnings = []

        def capture_warnings(msg, cls, stacklevel=None):

            self.assertEqual(cls, DeprecationWarning)

            local_warnings.append(msg)

        method = symbol_versioning.warn

        try:

            symbol_versioning.set_warning_method(capture_warnings)

            f = atomicfile.AtomicFile('test', mode='wb')

            self.assertEqual(False, f.closed)

            f.abort()

            self.assertEqual(True, f.closed)

            f = atomicfile.AtomicFile('test', mode='wb')

            f.close()

            self.assertEqual(True, f.closed)

            f = atomicfile.AtomicFile('test', mode='wb')

            f.commit()

            self.assertEqual(True, f.closed)

        finally:

            symbol_versioning.set_warning_method(method)

        txt = 'AtomicFile.closed deprecated in bzr 0.10'

        self.assertEqual([txt]*4, local_warnings)