rubenada commented on a change in pull request #2007:
URL: https://github.com/apache/calcite/pull/2007#discussion_r436546022
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File path:
core/src/test/java/org/apache/calcite/util/graph/DirectedGraphTest.java
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@@ -215,6 +215,34 @@
assertEquals("[D, E]", frozenGraph.getShortestPath("D", "E").toString());
}
+ @Test void testDistances() {
+ // B -> C
+ // / \
+ // A E
+ // \ /
+ // D -->
+ final DefaultDirectedGraph<String, DefaultEdge> graph =
+ DefaultDirectedGraph.create();
+ graph.addVertex("A");
+ graph.addVertex("B");
+ graph.addVertex("C");
+ graph.addVertex("D");
+ graph.addVertex("E");
+ graph.addVertex("F");
+ graph.addEdge("A", "B");
+ graph.addEdge("B", "C");
+ graph.addEdge("A", "D");
+ graph.addEdge("D", "E");
+ graph.addEdge("C", "E");
+ final Graphs.FrozenGraph<String, DefaultEdge> frozenGraph =
+ Graphs.makeImmutable(graph);
+ assertEquals(1, frozenGraph.getShortestDistance("A", "B"));
Review comment:
(minor) Maybe adding a unit test for the same node scenario?
`assertEquals(0, frozenGraph.getShortestDistance("B", "B"));`
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