public void testLaplacian() { UndirectedGraph<String, DefaultEdge> g = new SimpleGraph<String, DefaultEdge>(DefaultEdge.class); g.addVertex(V1); g.addVertex(V2); g.addEdge(V1, V2); g.addVertex(V3); g.addEdge(V3, V1); StringWriter w = new StringWriter(); exporter.exportLaplacianMatrix(w, g); assertEquals(LAPLACIAN, w.toString()); w = new StringWriter(); exporter.exportNormalizedLaplacianMatrix(w, g); assertEquals(NORMALIZED_LAPLACIAN, w.toString()); }