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from bzrlib.tests import TestCase
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from bzrlib.graph import node_distances, nodes_by_distance, Graph
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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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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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self.assert_(nodes[1] in ('N', 'C'))
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self.assert_(nodes[2] in ('N', 'C'))
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self.assert_(nodes[3] in ('B', 'M'))
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self.assert_(nodes[4] in ('B', 'M'))
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#Ensure we don't shortcut through B when there's only a difference of
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self.edge_add('A', 'B', 'C')
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self.edge_add('A', 'D', 'E', 'C')
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descendants = self.node_descendants()
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distances = node_distances(self.graph, descendants, 'A')
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self.assertEqual(distances['C'], 3)
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class TestGraph(TestCase):
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def test_get_descendants(self):
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# Graph objects let you get a descendants graph in
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# node: {direct-children:distance} which contains
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# known children, including ghost children
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graph.add_ghost('ghost')
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graph.add_node('rev1', ['ghost'])
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# check the result contains ghosts:
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self.assertEqual({'ghost': {'rev1': 1}, 'rev1': {}},
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graph.get_descendants())
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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')