aga,agar: New shortcut2 sample graph and testcases based on it

[ccan] / ccan / agar / test / simple-graphr.h

diff --git a/ccan/agar/test/simple-graphr.h b/ccan/agar/test/simple-graphr.h
index 168ee2902a9a3941b94712785b3d8a84869b58ca..2fe98a48776c9c2ddbc8bdd9a85100ad0a9b0685 100644 (file)
--- a/ccan/agar/test/simple-graphr.h
+++ b/ccan/agar/test/simple-graphr.h
@@ -219,4 +219,25 @@ static const struct adjacency_listr shortcut1_adjacencyr[] = {
        {},
 };
 
+/* Shortcut-2 graph
+ *
+ *   A ---- (2) -----> C
+ *    \             /
+ *     (2)-> B  --(-1)
+ *
+ * This provides an example of a graph with a negative edge cost, but
+ * no negative cost cycles (and so still with well defined shortest
+ * paths).
+ */
+struct shortcut2_graphr {
+       struct agar_graph gr;
+};
+void shortcut2_graphr_init(struct shortcut2_graphr *s2gr);
+static const struct adjacency_listr shortcut2_adjacencyr[] = {
+       {1, {3, 2}},
+       {2, {3}},
+       {3, {}},
+       {},
+};
+
 #endif /* _SIMPLE_GRAPHR_H */