}
@Test
public void handleMessageToClientConnectedWithHeartbeats() {
SockJsSession sockJsSession = Mockito.mock(SockJsSession.class);
StompHeaderAccessor headers = StompHeaderAccessor.create(StompCommand.CONNECTED);
headers.setHeartbeat(0,10);
Message<byte[]> message = MessageBuilder.createMessage(EMPTY_PAYLOAD, headers.getMessageHeaders());
this.protocolHandler.handleMessageToClient(sockJsSession, message);