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# (C) 2005 Canonical Ltd
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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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# 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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# 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 bzrlib.selftest import InTempDir
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from bzrlib.branch import Branch
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from bzrlib.commit import commit
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br1 = Branch("branch1", init=True)
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commit(br1, "Commit one")
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commit(br1, "Commit two")
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commit(br1, "Commit three")
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br2 = Branch("branch2", init=True)
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br2.update_revisions(br1)
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commit(br2, "Commit four")
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commit(br2, "Commit five")
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revisions_2 = br2.revision_history()
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br1.add_pending_merge(revisions_2[4])
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commit(br1, "Commit six")
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class TestIsAncestor(InTempDir):
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"""Test checking whether a revision is an ancestor of another revision"""
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from bzrlib.revision import is_ancestor, MultipleRevisionSources
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from bzrlib.errors import NoSuchRevision
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br1, br2 = make_branches()
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revisions = br1.revision_history()
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revisions_2 = br2.revision_history()
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sources = MultipleRevisionSources(br1, br2)
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assert is_ancestor(revisions[0], revisions[0], sources)
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assert is_ancestor(revisions[1], revisions[0], sources)
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assert not is_ancestor(revisions[0], revisions[1], sources)
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assert is_ancestor(revisions_2[3], revisions[0], sources)
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self.assertRaises(NoSuchRevision, is_ancestor, revisions_2[3],
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assert is_ancestor(revisions[3], revisions_2[4], sources)
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assert is_ancestor(revisions[3], revisions_2[4], br1)
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assert is_ancestor(revisions[3], revisions_2[3], sources)
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assert not is_ancestor(revisions[3], revisions_2[3], br1)