@Test
        @FeatureRequirement(featureClass = Graph.Features.VertexFeatures.class, feature = Graph.Features.VertexFeatures.FEATURE_ADD_VERTICES)
        public void shouldEvaluateEquivalentVerticesWithNoSuppliedIds() {
            final Vertex v = graph.addVertex();
            assertNotNull(v);

            final Vertex u = graph.vertices(v.id()).next();
            assertNotNull(u);
            assertEquals(v, u);

            assertEquals(graph.vertices(u.id()).next(), graph.vertices(u.id()).next());
            assertEquals(graph.vertices(v.id()).next(), graph.vertices(u.id()).next());
            assertEquals(graph.vertices(v.id()).next(), graph.vertices(v.id()).next());
        }
@author Marko A. Rodriguez (http://markorodriguez.com)
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/structure/VertexTest.java