// Test connection.
assertEquals(INVOCATION_TEST, client.invoke(INVOCATION_TEST));
// Add callback handler and test callback BisocketClientInvoker socket maps.
TestInvokerCallbackHandler callbackHandler = new TestInvokerCallbackHandler();
client.addListener(callbackHandler, new HashMap());
assertEquals(1, invocationHandler.listeners.size());
Iterator it = invocationHandler.listeners.iterator();
ServerInvokerCallbackHandler serverInvokerCallbackHandler;
serverInvokerCallbackHandler = (ServerInvokerCallbackHandler) it.next();
Client callbackClient = serverInvokerCallbackHandler.getCallbackClient();