1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
|
from bzrlib.selftest import TestCase
from bzrlib.graph import farthest_nodes
class TestBase(TestCase):
def edge_add(self, *args):
for start, end in zip(args[:-1], args[1:]):
if start not in self.graph:
self.graph[start] = {}
if end not in self.graph:
self.graph[end] = {}
self.graph[start][end] = 1
def setUp(self):
TestCase.setUp(self)
self.graph = {}
self.edge_add('A', 'B', 'C', 'D')
self.edge_add('A', 'E', 'F', 'C')
self.edge_add('A', 'G', 'H', 'I', 'B')
self.edge_add('A', 'J', 'K', 'L', 'M', 'N')
self.edge_add('O', 'N')
def test_farthest(self):
descendants = {'A':set()}
for node in self.graph:
for ancestor in self.graph[node]:
if ancestor not in descendants:
descendants[ancestor] = set()
descendants[ancestor].add(node)
nodes = farthest_nodes(self.graph, descendants, 'A')
self.assertEqual(nodes[0], 'D')
assert nodes[1] in ('N', 'C')
assert nodes[2] in ('N', 'C')
assert nodes[3] in ('B', 'M')
assert nodes[4] in ('B', 'M')
|