@Test
    public void shouldEvalSuccessfulAssert() throws Exception {
        final GremlinGroovyScriptEngine engine = new GremlinGroovyScriptEngine();
        assertNull(engine.eval("assert 1==1"));
    }
@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-groovy/src/test/java/org/apache/tinkerpop/gremlin/groovy/jsr223/GremlinGroovyScriptEngineTest.java