@Test
        @FeatureRequirementSet(FeatureRequirementSet.Package.VERTICES_ONLY)
        public void shouldReturnEmptyPropertyIfKeyNonExistent() {
            final Vertex v = graph.addVertex("name", "marko");
            tryCommit(graph, (graph) -> {
                final Vertex v1 = graph.vertices(v.id()).next();
                final VertexProperty p = v1.property("nonexistentkey");
                assertEquals(VertexProperty.empty(), p);
            });
        }
Basic tests for the {@link Property} class.
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/structure/PropertyTest.java