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bzrlib/tests/per_repository_reference/test_graph.py
 
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# Copyright (C) 2011 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
 
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"""Tests for graph operations on stacked repositories."""
 
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from bzrlib.tests.per_repository import TestCaseWithRepository
 
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class TestGraph(TestCaseWithRepository):
 
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    def test_get_known_graph_ancestry_stacked(self):
 
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        """get_known_graph_ancestry works correctly on stacking.
 
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        See <https://bugs.launchpad.net/bugs/715000>.
 
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        """
 
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        branch_a, branch_b, branch_c, revid_1 = self.make_double_stacked_branches()
 
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        for br in [branch_a, branch_b, branch_c]:
 
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            self.assertEquals(
 
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                [revid_1],
 
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                br.repository.get_known_graph_ancestry([revid_1]).topo_sort())
 
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    def make_double_stacked_branches(self):
 
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        wt_a = self.make_branch_and_tree('a')
 
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        branch_a = wt_a.branch
 
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        branch_b = self.make_branch('b')
 
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        branch_b.set_stacked_on_url('../a')
 
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        branch_c = self.make_branch('c')
 
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        branch_c.set_stacked_on_url('../b')
 
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        revid_1 = wt_a.commit('first commit')
 
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        return branch_a, branch_b, branch_c, revid_1