~bzr-pqm/bzr/bzr.dev

# (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 bzrlib.selftest import FunctionalTestCase

def make_branches():

    from bzrlib.branch import Branch

    from bzrlib.commit import commit

    from bzrlib.revision import validate_revision_id

    import os

    os.mkdir("branch1")

    br1 = Branch("branch1", init=True)

    commit(br1, "Commit one", rev_id="a@u-0-0")

    commit(br1, "Commit two", rev_id="a@u-0-1")

    commit(br1, "Commit three", rev_id="a@u-0-2")

    os.mkdir("branch2")

    br2 = Branch("branch2", init=True)

    br2.update_revisions(br1)

    commit(br2, "Commit four", rev_id="b@u-0-3")

    commit(br2, "Commit five", rev_id="b@u-0-4")

    revisions_2 = br2.revision_history()

    br1.add_pending_merge(revisions_2[4])

    commit(br1, "Commit six", rev_id="a@u-0-3")

    commit(br1, "Commit seven", rev_id="a@u-0-4")

    commit(br2, "Commit eight", rev_id="b@u-0-5")

    br1.add_pending_merge(br2.revision_history()[5])

    commit(br1, "Commit nine", rev_id="a@u-0-5")

    br2.add_pending_merge(br1.revision_history()[4])

    commit(br2, "Commit ten", rev_id="b@u-0-6")

    return br1, br2

class TestIsAncestor(FunctionalTestCase):

    def test_is_ancestor(self):

        """Test checking whether a revision is an ancestor of another revision"""

        from bzrlib.revision import is_ancestor, MultipleRevisionSources

        from bzrlib.errors import NoSuchRevision

        br1, br2 = make_branches()

        revisions = br1.revision_history()

        revisions_2 = br2.revision_history()

        sources = MultipleRevisionSources(br1, br2)

        assert is_ancestor(revisions[0], revisions[0], sources)

        assert is_ancestor(revisions[1], revisions[0], sources)

        assert not is_ancestor(revisions[0], revisions[1], sources)

        assert is_ancestor(revisions_2[3], revisions[0], sources)

        self.assertRaises(NoSuchRevision, is_ancestor, revisions_2[3],

                          revisions[0], br1)        

        assert is_ancestor(revisions[3], revisions_2[4], sources)

        assert is_ancestor(revisions[3], revisions_2[4], br1)

        assert is_ancestor(revisions[3], revisions_2[3], sources)

        assert not is_ancestor(revisions[3], revisions_2[3], br1)

class TestCommonAncestor(FunctionalTestCase):

    """Test checking whether a revision is an ancestor of another revision"""

    def test_common_ancestor(self):

        from bzrlib.revision import find_present_ancestors, common_ancestor

        from bzrlib.revision import MultipleRevisionSources

        br1, br2 = make_branches()

        revisions = br1.revision_history()

        revisions_2 = br2.revision_history()

        sources = MultipleRevisionSources(br1, br2)

        expected_ancestors_list = {revisions[3]:(0, 0), 

                                   revisions[2]:(1, 1),

                                   revisions_2[4]:(2, 1), 

                                   revisions[1]:(3, 2),

                                   revisions_2[3]:(4, 2),

                                   revisions[0]:(5, 3) }

        ancestors_list = find_present_ancestors(revisions[3], sources)

        assert len(expected_ancestors_list) == len(ancestors_list)

        for key, value in expected_ancestors_list.iteritems():

            self.assertEqual(ancestors_list[key], value, 

                              "key %r, %r != %r" % (key, ancestors_list[key],

                                                    value))

        self.assertEqual(common_ancestor(revisions[0], revisions[0], sources),

                          revisions[0])

        self.assertEqual(common_ancestor(revisions[1], revisions[2], sources),

                          revisions[1])

        self.assertEqual(common_ancestor(revisions[1], revisions[1], sources),

                          revisions[1])

        self.assertEqual(common_ancestor(revisions[2], revisions_2[4], sources),

                          revisions[2])

        self.assertEqual(common_ancestor(revisions[3], revisions_2[4], sources),

                          revisions_2[4])

        self.assertEqual(common_ancestor(revisions[4], revisions_2[5], sources),

                          revisions_2[4])

        self.assertEqual(common_ancestor(revisions[5], revisions_2[6], sources),

                          revisions[4])

        self.assertEqual(common_ancestor(revisions_2[6], revisions[5], sources),

                          revisions_2[5])