~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2011 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA

from bzrlib import (

    workingtree,

    )

from bzrlib.tests import TestCaseWithTransport

class TestRepairWorkingTree(TestCaseWithTransport):

    def break_dirstate(self, tree, completely=False):

        """Write garbage into the dirstate file."""

        # This test assumes that the format uses a DirState file, which we then

        # manually corrupt. If we change the way to get at that dirstate file,

        # then we can update how this is done

        self.assertIsNot(None, getattr(tree, 'current_dirstate', None))

        tree.lock_read()

        try:

            dirstate = tree.current_dirstate()

            dirstate_path = dirstate._filename

            self.assertPathExists(dirstate_path)

        finally:

            tree.unlock()

        # We have to have the tree unlocked at this point, so we can safely

        # mutate the state file on all platforms.

        if completely:

            f = open(dirstate_path, 'wb')

        else:

            f = open(dirstate_path, 'ab')

        try:

            f.write('garbage-at-end-of-file\n')

        finally:

            f.close()

    def make_initial_tree(self):

        tree = self.make_branch_and_tree('tree')

        self.build_tree(['tree/foo', 'tree/dir/', 'tree/dir/bar'])

        tree.add(['foo', 'dir', 'dir/bar'])

        tree.commit('first')

        return tree

    def test_repair_refuses_uncorrupted(self):

        tree = self.make_initial_tree()

        # If the tree doesn't appear to be corrupt, we refuse, but prompt the

        # user to let them know that:

        # a) they may want to use 'bzr revert' instead of repair-workingtree

        # b) they can use --force if they really want to do this

        self.run_bzr_error(['The tree does not appear to be corrupt',

                            '"bzr revert"',

                            '--force'],

                           'repair-workingtree -d tree')

    def test_repair_forced(self):

        tree = self.make_initial_tree()

        tree.rename_one('dir', 'alt_dir')

        self.assertIsNot(None, tree.path2id('alt_dir'))

        self.run_bzr('repair-workingtree -d tree --force')

        # This requires the tree has reloaded the working state

        self.assertIs(None, tree.path2id('alt_dir'))

        self.assertPathExists('tree/alt_dir')

    def test_repair_corrupted_dirstate(self):

        tree = self.make_initial_tree()

        self.break_dirstate(tree)

        self.run_bzr('repair-workingtree -d tree')

        tree = workingtree.WorkingTree.open('tree')

        # At this point, check should be happy

        tree.check_state()

    def test_repair_naive_destroyed_fails(self):

        tree = self.make_initial_tree()

        self.break_dirstate(tree, completely=True)

        self.run_bzr_error(['the header appears corrupt, try passing'],

                           'repair-workingtree -d tree')

    def test_repair_destroyed_with_revs_passes(self):

        tree = self.make_initial_tree()

        self.break_dirstate(tree, completely=True)

        self.run_bzr('repair-workingtree -d tree -r -1')

        tree = workingtree.WorkingTree.open('tree')

        # At this point, check should be happy

        tree.check_state()