@Test
    public void shouldHandleVoidResult() throws Exception {
        final ResultSet results = client.submit("g.V().drop().iterate()");
        assertEquals(0, results.all().get().size());
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-server/src/test/java/org/apache/tinkerpop/gremlin/server/GremlinResultSetIntegrateTest.java