~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

"""Test branches with inaccessible parents."""

import os

from bzrlib import branch, errors

from bzrlib.tests.branch_implementations.test_branch import TestCaseWithBranch

from bzrlib.tests.http_server import HttpServer

from bzrlib.transport.local import LocalURLServer

from bzrlib.transport.chroot import TestingChrootServer

class InaccessibleParentTests(TestCaseWithBranch):

    """Tests with branches with "inaccessible" parents.

    An "inaccessible" parent location is one that cannot be represented, e.g. if

    a child branch says its parent is at "../../my-parent", but that child is at

    "http://host/one" then that parent location is inaccessible.  These

    branches' get_parent method will raise InaccessibleParent.

    """

    def setUp(self):

        super(InaccessibleParentTests, self).setUp()

        if self.transport_server in (LocalURLServer, None):

            self.transport_readonly_server = TestingChrootServer

    def get_branch_with_invalid_parent(self):

        """Get a branch whose get_parent will raise InaccessibleParent."""

        self.build_tree(

            ['parent/', 'parent/path/', 'parent/path/to/',

             'child/', 'child/path/', 'child/path/to/'],

            transport=self.get_transport())

        self.make_branch('parent/path/to/a').bzrdir.sprout(self.get_url('child/path/to/b'))

        # The child branch internally will have recorded that its parent is at

        # "../../../../parent/path/to/a" or similar.  So we move the child

        # branch up several directories, so that its parent path will point to

        # somewhere outside the directory served by the HTTP server.  Thus its

        # parent is now inaccessible.

        self.get_transport().rename('child/path/to/b', 'b')

        branch_b = branch.Branch.open(self.get_readonly_url('b'))

        return branch_b

    def test_get_parent_invalid(self):

        # When you have a branch whose parent URL cannot be calculated, this

        # exception will be raised.

        branch_b = self.get_branch_with_invalid_parent()

        self.assertRaises(errors.InaccessibleParent, branch_b.get_parent)

    def test_clone_invalid_parent(self):

        # If clone can't determine the location of the parent of the branch

        # being cloned, then the new branch will have no parent set.

        branch_b = self.get_branch_with_invalid_parent()

        branch_c = branch_b.bzrdir.clone('c').open_branch()

        self.assertEqual(None, branch_c.get_parent())

    def test_sprout_invalid_parent(self):

        # A sprouted branch will have a parent of the branch it was sprouted

        # from, even if that branch has an invalid parent.

        branch_b = self.get_branch_with_invalid_parent()

        branch_c = branch_b.bzrdir.sprout('c').open_branch()

        self.assertEqual(branch_b.base, branch_c.get_parent())