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add graph topology test

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This commit is contained in:
Ivan Li 2019-01-30 19:23:03 +08:00
parent a5f97492c1
commit efeef701d9
1 changed files with 19 additions and 0 deletions
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19
scala/src/test/scala/ch43_topology_sort/GraphTopologyTest.scala
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@ -42,4 +42,23 @@ class GraphTopologyTest extends FlatSpec with Matchers {
val seq = graphTopology.topologySortByKahn()
seq.map(nodes(_)).mkString(",") should equal("a,b,d,e,c")
}
/*
a -> d <- b
| /|\
\|/ |
e -> c
*/
it should "topologySortByKahn - 3" in {
val nodes = Array("a", "b", "c", "d", "e")
val graphTopology = new GraphTopology(nodes.length)
graphTopology.addEdge(0, 3)
graphTopology.addEdge(3, 4)
graphTopology.addEdge(4, 2)
graphTopology.addEdge(2, 1)
graphTopology.addEdge(1, 3)
val seq = graphTopology.topologySortByKahn()
seq.map(nodes(_)).mkString(",") should equal("a")
}
}