@Test
  public void handleMessageToClientConnectAck() {

    StompHeaderAccessor connectHeaders = StompHeaderAccessor.create(StompCommand.CONNECT);
    connectHeaders.setHeartbeat(10000, 10000);
    connectHeaders.setNativeHeader(StompHeaderAccessor.STOMP_ACCEPT_VERSION_HEADER, "1.0,1.1");
    Message<?> connectMessage =
        MessageBuilder.withPayload(new byte[0]).setHeaders(connectHeaders).build();

    SimpMessageHeaderAccessor connectAckHeaders =
        SimpMessageHeaderAccessor.create(SimpMessageType.CONNECT_ACK);
    connectAckHeaders.setHeader(SimpMessageHeaderAccessor.CONNECT_MESSAGE_HEADER, connectMessage);
    Message<byte[]> connectAckMessage =
        MessageBuilder.withPayload(new byte[0]).setHeaders(connectAckHeaders).build();

    this.protocolHandler.handleMessageToClient(this.session, connectAckMessage);

    verifyNoMoreInteractions(this.channel);

    // Check CONNECTED reply

    assertEquals(1, this.session.getSentMessages().size());
    TextMessage textMessage = (TextMessage) this.session.getSentMessages().get(0);
    Message<?> message =
        new StompDecoder().decode(ByteBuffer.wrap(textMessage.getPayload().getBytes()));
    StompHeaderAccessor replyHeaders = StompHeaderAccessor.wrap(message);

    assertEquals(StompCommand.CONNECTED, replyHeaders.getCommand());
    assertEquals("1.1", replyHeaders.getVersion());
    assertArrayEquals(new long[] {0, 0}, replyHeaders.getHeartbeat());
    assertEquals("joe", replyHeaders.getNativeHeader("user-name").get(0));
  }