field.setAccessible(true);
LinkedList pool = (LinkedList) field.get(callbackClientInvoker);
assertEquals(1, pool.size());
Object o = pool.iterator().next();
assertTrue(o instanceof ClientSocketWrapper);
ClientSocketWrapper clientWrapper = (ClientSocketWrapper) o;
assertEquals(3000, clientWrapper.getTimeout());
client.removeListener(callbackHandler);
client.disconnect();
connector.stop();
}