Testing Whiteboard Data Transmission with Socket.IO: A Step‑by‑Step Script Guide

Overview

This article demonstrates how to use the Socket.IO framework to perform functional testing of the whiteboard pixel‑data transmission interface. The same Socket.IO client library version from previous examples is used, and a ready‑to‑run Java test script is provided.

Test Script

private static Logger logger = LoggerFactory.getLogger(ST.class);

static int roomId = 44465;
static int activity_id = roomId;

public static void main(String[] args) {
    def tbase = getTeaBase();
    def sbase = getStuBase();
    initAll();
    registerAll();
    joinRoom(roomId);

    BoardUser boardUser = new BoardUser(Users.getTeaUser(0));
    List<String> list = boardUser.writeCircle();
    teacher.send(EVENT, showWhite(roomId));
    teacher.send(EVENT, showWhiteStatus(roomId));
    list.each {
        teacher.send(EVENT, sendWhiteData(it, roomId));
    }

    sleep(5.0);
    teacher.send(EVENT, showWhite(roomId));
    waitForKey(DEFAULT_STRING);
    leaveRoom(roomId);

    ScoketIOFunClient.closeAll();
}

Console Output

Only a representative portion of the large payload is shown. The logs confirm that the client receives the expected wbDataResponse messages.

10:31:49 INFO org.slf4j.Logger$info$0.call(Unknown Source) - 老师:61951375269 收到响应:[{"msg":"SUCCESS","code":0,"data":{"data":[1,3,-78,-24,...],"pageNo":0,"cmd":"wbData","id":1608883690000433777,"roomId":44465},"cmd":"wbDataResponse"}]
... (additional similar log entries) ...

Business‑Related Interface Verification

The joinRoom API triggers a wbFullDataNotify notification for each user entering the room. This notification pushes the current whiteboard state and drawing details to the client.

10:40:00 INFO org.slf4j.Logger$info$0.call(Unknown Source) - 老师:61951375269 收到响应:[{"msg":"SUCCESS","code":0,"data":{"maxId":1608883690000433800,"data":[1,100,-90,115,...],"roomId":44465,"ts":1611196360610},"cmd":"wbFullDataNotify"}]