@Test
    @LoadGraphWith(MODERN)
    public void g_V_aggregateXaX_byXfooX_capXaX_unfold_sum() {
        final Traversal<Vertex, Number> traversal = get_g_V_aggregateXaX_byXfooX_capXaX_unfold_sum();
        printTraversalForm(traversal);;
        assertFalse(traversal.hasNext());
    }
@author Daniel Kuppitz (http://gremlin.guru)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/process/traversal/step/map/SumTest.java