@Test
    public void shouldHaveCoreImportsInPlace() throws Exception {
        final GremlinScriptEngine scriptEngine = manager.getEngineByName(ENGINE_TO_TEST);
        final List<Class> classesToCheck = Arrays.asList(Vertex.class, Edge.class, Graph.class, VertexProperty.class);
        for (Class clazz : classesToCheck) {
            assertEquals(clazz, scriptEngine.eval(clazz.getSimpleName()));
        }
    }
This is an important test case in that it validates that core features of {@code ScriptEngine} instances that claim
to be "Gremlin-enabled" work in the expected fashion.

@author Stephen Mallette (http://stephen.genoprime.com)
gremlin-test/src/main/java/org/apache/tinkerpop/gremlin/jsr223/GremlinEnabledScriptEngineTest.java