public void GraphSearchTest() { UndirectedGraph <string> graph = new UndirectedGraph <string>(); GraphNode <string> node1 = new GraphNode <string>("node1"); GraphNode <string> node2 = new GraphNode <string>("node2"); GraphNode <string> node3 = new GraphNode <string>("node3"); GraphNode <string> node4 = new GraphNode <string>("node4"); GraphNode <string> node5 = new GraphNode <string>("node5"); graph.AddPair(node1, node4); graph.AddPair(node4, node5); graph.AddPair(node5, node2); Assert.AreEqual(node2, DFS.FindGraphNode(node1, "node2")); Assert.AreEqual(null, DFS.FindGraphNode(node1, "node3")); }