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bzrlib/tests/test_ancestry.py
 
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# Copyright (C) 2005, 2007 Canonical Ltd
 
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#
 
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# This program is free software; you can redistribute it and/or modify
 
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# it under the terms of the GNU General Public License as published by
 
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# the Free Software Foundation; either version 2 of the License, or
 
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# (at your option) any later version.
 
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#
 
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# This program is distributed in the hope that it will be useful,
 
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
 
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 
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# GNU General Public License for more details.
 
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#
 
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# You should have received a copy of the GNU General Public License
 
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# along with this program; if not, write to the Free Software
 
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
 
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from cStringIO import StringIO
 
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import os
 
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import sys
 
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from bzrlib.tests import TestCaseWithMemoryTransport
 
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from bzrlib.branch import Branch
 
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from bzrlib.branchbuilder import BranchBuilder
 
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from bzrlib.revision import is_ancestor
 
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class TestAncestry(TestCaseWithMemoryTransport):
 
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    def assertAncestryEqual(self, expected, revision_id, branch):
 
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        """Assert that the ancestry of revision_id in branch is as expected."""
 
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        ancestry = branch.repository.get_ancestry(revision_id)
 
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        self.assertEqual(expected, ancestry)
 
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    def test_straightline_ancestry(self):
 
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        """Test ancestry file when just committing."""
 
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        builder = BranchBuilder(self.get_transport())
 
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        rev_id_one = builder.build_commit()
 
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        rev_id_two = builder.build_commit()
 
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        branch = builder.get_branch()
 
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        self.assertAncestryEqual([None, rev_id_one, rev_id_two],
 
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            rev_id_two, branch)
 
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        self.assertAncestryEqual([None, rev_id_one], rev_id_one, branch)
 
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    def test_none_is_ancestor_empty_branch(self):
 
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        branch = self.make_branch('.')
 
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        self.assertTrue(is_ancestor('null:', 'null:', branch))
 
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    def test_none_is_ancestor_non_empty_branch(self):
 
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        builder = BranchBuilder(self.get_transport())
 
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        rev_id = builder.build_commit()
 
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        branch = builder.get_branch()
 
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        self.assertTrue(is_ancestor('null:', 'null:', branch))
 
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        self.assertTrue(is_ancestor(rev_id, 'null:',  branch))
 
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        self.assertFalse(is_ancestor('null:', rev_id, branch))
 
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# TODO: check that ancestry is updated to include indirectly merged revisions