	@Test
	public void testCC()
	{

		Graph<String, String> graph = new UndirectedSparseGraph<String, String>();
		
		graph.addEdge("0", "a", "b");
		graph.addEdge("1", "b", "c");
		graph.addEdge("2", "c", "d");
		graph.addEdge("3", "d", "a");
		graph.addEdge("4", "a", "c");
		

		System.out.println(Graphs.clusteringCoefficient(graph));
	}