@Override
    public void execute(GraphModel graphModel) {
        final Graph graph;
        if (useUndirected) {
            graph = graphModel.getUndirectedGraphVisible();
        } else {
            graph = graphModel.getDirectedGraphVisible();
        }
        execute(graph);
    }
@Test
    public void testColumnCreation() {
        GraphModel graphModel = GraphGenerator.generateNullUndirectedGraph(1);

        Hits h = new Hits();
        h.execute(graphModel);

        Assert.assertTrue(graphModel.getNodeTable().hasColumn(Hits.HUB));
    }