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Viewing changes to bzrlib/selftest/testgraph.py

  • Committer: Aaron Bentley
  • Date: 2005-09-18 19:21:48 UTC
  • mto: (1185.1.29)
  • mto: This revision was merged to the branch mainline in revision 1390.
  • Revision ID: aaron.bentley@utoronto.ca-20050918192148-3f9373ac85a83b02
Refactored and documented graph stuff

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bzrlib/selftest/testgraph.py
 
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from bzrlib.selftest import TestCase
 
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from bzrlib.graph import node_distances, nodes_by_distance
 
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class TestBase(TestCase):
 
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    def edge_add(self, *args):
 
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        for start, end in zip(args[:-1], args[1:]):
 
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            if start not in self.graph:
 
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                self.graph[start] = {}
 
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            if end not in self.graph:
 
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                self.graph[end] = {}
 
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            self.graph[start][end] = 1
 
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    def setUp(self):
 
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        TestCase.setUp(self)
 
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        self.graph = {}
 
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        self.edge_add('A', 'B', 'C', 'D')
 
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        self.edge_add('A', 'E', 'F', 'C')
 
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        self.edge_add('A', 'G', 'H', 'I', 'B')
 
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        self.edge_add('A', 'J', 'K', 'L', 'M', 'N')
 
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        self.edge_add('O', 'N')
 
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    def node_descendants(self):
 
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        descendants = {'A':set()}
 
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        for node in self.graph:
 
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            for ancestor in self.graph[node]:
 
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                if ancestor not in descendants:
 
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                    descendants[ancestor] = set()
 
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                descendants[ancestor].add(node)
 
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        return descendants
 
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    def test_distances(self):
 
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        descendants = self.node_descendants()
 
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        distances = node_distances(self.graph, descendants, 'A')
 
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        nodes = nodes_by_distance(distances)
 
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        self.assertEqual(nodes[0], 'D')
 
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        assert nodes[1] in ('N', 'C')
 
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        assert nodes[2] in ('N', 'C')
 
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        assert nodes[3] in ('B', 'M')
 
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        assert nodes[4] in ('B', 'M')
 
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