@Test
    public void shouldEvalSuccessfulAssertionScript() throws Exception {
        final GremlinExecutor gremlinExecutor = GremlinExecutor.build().create();
        assertNull(gremlinExecutor.eval("assert 1==1").get());
        gremlinExecutor.close();
    }
Temporary "useless" plugin definition to force GremlinExecutor to use GremlinScriptEngineManager - will be
removed when the old functionality of ScriptEngines is removed.
gremlin-groovy/src/test/java/org/apache/tinkerpop/gremlin/groovy/engine/GremlinExecutorTest.java