~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

"""Tests for WorkingTree.check_state."""

from bzrlib import (

    errors,

    tests,

    )

from bzrlib.tests.per_workingtree import TestCaseWithWorkingTree

class TestCaseWithState(TestCaseWithWorkingTree):

    def make_tree_with_broken_dirstate(self, path):

        tree = self.make_branch_and_tree(path)

        self.break_dirstate(tree)

        return tree

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

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

        if getattr(tree, 'current_dirstate', None) is None:

            raise tests.TestNotApplicable(

                'Only applies to dirstate-based trees')

        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()

class TestCheckState(TestCaseWithState):

    def test_check_state(self):

        tree = self.make_branch_and_tree('tree')

        # Everything should be fine with an unmodified tree, no exception

        # should be raised.

        tree.check_state()

    def test_check_broken_dirstate(self):

        tree = self.make_tree_with_broken_dirstate('tree')

        self.assertRaises(errors.BzrError, tree.check_state)

class TestResetState(TestCaseWithState):

    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('initial')

        return tree

    def test_reset_state_forgets_changes(self):

        tree = self.make_initial_tree()

        foo_id = tree.path2id('foo')

        tree.rename_one('foo', 'baz')

        self.assertEqual(None, tree.path2id('foo'))

        self.assertEqual(foo_id, tree.path2id('baz'))

        tree.reset_state()

        # After reset, we should have forgotten about the rename, but we won't

        # have

        self.assertEqual(foo_id, tree.path2id('foo'))

        self.assertEqual(None, tree.path2id('baz'))

        self.assertPathDoesNotExist('tree/foo')

        self.assertPathExists('tree/baz')

    def test_reset_state_handles_corrupted_dirstate(self):

        tree = self.make_initial_tree()

        rev_id = tree.last_revision()

        self.break_dirstate(tree)

        tree.reset_state()

        tree.check_state()

        self.assertEqual(rev_id, tree.last_revision())

    def test_reset_state_handles_destroyed_dirstate(self):

        # If you pass the revision_id, we can handle a completely destroyed

        # dirstate file.

        tree = self.make_initial_tree()

        rev_id = tree.last_revision()

        self.break_dirstate(tree, completely=True)

        tree.reset_state(revision_ids=[rev_id])

        tree.check_state()

        self.assertEqual(rev_id, tree.last_revision())