Refreshing detached entities

[Jerry Carter]

Possible gap in my understanding, but I would expect an exception in this case 
based on section 3.2.5 of the JPA 2.0 specification: "If [entity] X is new, 
detached, or removed entity, the IllegalArgumentException is thrown".

try {
        TestEntity refreshDetached = new TestEntity("refresh detached");
        em.persist(refreshDetached);
        em.flush();
        em.detach(refreshDetached);
        em.refresh(refreshDetached);
        logger.error("ERROR: No exception from em.refresh(detached)");
} catch (IllegalArgumentException e) {
        logger.info("SUCCESS: Refresh detached");
} catch (Exception e) {
        logger.error("ERROR: Unexpected exception from em.refresh(detached): " 
+ e.toString());
}

ERROR: No exception from em.refresh(detached)