MethodInterceptor interceptor =  new NoOpInterceptor();
    public void testEnhance()throws Throwable{                MethodInterceptor interceptor =  new NoOpInterceptor();                java.util.Vector vector1 = (java.util.Vector)Enhancer.enhance(        java.util.Vector.class,        new Class[]{java.util.List.class},interceptor );                java.util.Vector vector2  = (java.util.Vector)Enhancer.enhance(        java.util.Vector.class,        new Class[]{java.util.List.class},interceptor );                                        assertTrue("Cache failed",vector1.getClass() == vector2.getClass());            }