@Test
    public void shouldWriteCrewGraphAsGraphSONV2NoTypes() throws IOException {
        final OutputStream os = new FileOutputStream(new File(tempPath, "tinkerpop-crew-v2.json"));
        GraphSONWriter.build().mapper(GraphSONMapper.build().version(GraphSONVersion.V2_0).typeInfo(TypeInfo.NO_TYPES).create()).create()
                .writeGraph(os, TinkerFactory.createTheCrew());
        os.close();
    }
No assertions.  Just write out the graph for convenience.
tinkergraph-gremlin/src/test/java/org/apache/tinkerpop/gremlin/tinkergraph/structure/IoDataGenerationTest.java