~bzr-pqm/bzr/bzr.dev

# Copyright (C) 2005 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

from cStringIO import StringIO

import os

import sys

from bzrlib.tests import TestCaseWithMemoryTransport

from bzrlib.branch import Branch

from bzrlib.revision import is_ancestor

class TestAncestry(TestCaseWithMemoryTransport):

    def assertAncestryEqual(self, expected, revision_id, branch):

        """Assert that the ancestry of revision_id in branch is as expected."""

        ancestry = branch.repository.get_ancestry(revision_id)

        self.assertEqual(expected, ancestry)

    def test_straightline_ancestry(self):

        """Test ancestry file when just committing."""

        tree = self.make_branch_and_memory_tree('.')

        branch = tree.branch

        tree.lock_write()

        tree.add('')

        rev_id_one = tree.commit('one')

        rev_id_two = tree.commit('two', allow_pointless=True)

        tree.unlock()

        self.assertAncestryEqual([None, rev_id_one, rev_id_two],

            rev_id_two, branch)

        self.assertAncestryEqual([None, rev_id_one], rev_id_one, branch)

    def test_none_is_always_an_ancestor(self):

        tree = self.make_branch_and_memory_tree('.')

        tree.lock_write()

        tree.add('')

        # note this is tested before any commits are done.

        self.assertTrue(is_ancestor(None, None, tree.branch))

        rev_id = tree.commit('one')

        tree.unlock()

        self.assertTrue(is_ancestor(None, None, tree.branch))

        self.assertTrue(is_ancestor(rev_id, None, tree.branch))

        self.assertFalse(is_ancestor(None, rev_id, tree.branch))

# TODO: check that ancestry is updated to include indirectly merged revisions