Migrate Socket.IO from Version 2 to Version 3 🚀 (#6152)

* feat :migrate socket.io 2 -> 3

* fix: backend test

* fix: ts error

* rm

* reset the test timeout

* Updated cli client.

* Updated lock file.

* Use updated load tester.

---------

Co-authored-by: SamTV12345 <40429738+samtv12345@users.noreply.github.com>

src/tests/backend/common.js

@@ -147,7 +147,6 @@ exports.connect = async (res = null) => {
   }
   const socket = io(`${exports.baseUrl}/`, {
     forceNew: true, // Different tests will have different query parameters.
-    path: '/socket.io',
     // socketio.js-client on node.js doesn't support cookies (see https://git.io/JU8u9), so the
     // express_sid cookie must be passed as a query parameter.
     query: {cookie: reqCookieHdr, padId},
@@ -172,7 +171,7 @@ exports.connect = async (res = null) => {
  */
 exports.handshake = async (socket, padId, token = padutils.generateAuthorToken()) => {
   logger.debug('sending CLIENT_READY...');
-  socket.send({
+  socket.emit('message', {
     component: 'pad',
     type: 'CLIENT_READY',
     padId,
@@ -189,7 +188,7 @@ exports.handshake = async (socket, padId, token = padutils.generateAuthorToken()
  * Convenience wrapper around `socket.send()` that waits for acknowledgement.
  */
 exports.sendMessage = async (socket, message) => await new Promise((resolve, reject) => {
-  socket.send(message, (errInfo) => {
+  socket.emit('message', message, (errInfo) => {
     if (errInfo != null) {
       const {name, message} = errInfo;
       const err = new Error(message);

src/tests/backend/specs/chat.js

@@ -32,7 +32,7 @@ const checkHook = async (hookName, checkFn) => {
 };
 
 const sendMessage = (socket, data) => {
-  socket.send({
+  socket.emit('message', {
     type: 'COLLABROOM',
     component: 'pad',
     data,

src/tests/backend/specs/messages.js

@@ -38,6 +38,7 @@ describe(__filename, function () {
     res = await agent.get(`/p/${roPadId}`).expect(200);
     roSocket = await common.connect(res);
     await common.handshake(roSocket, roPadId);
+    await new Promise(resolve => setTimeout(resolve, 1000));
   });
 
   afterEach(async function () {

src/tests/backend/specs/socketio.js

@@ -390,7 +390,7 @@ describe(__filename, function () {
         handleMessage(socket, message) { assert.fail('wrong handler called'); }
       }());
       socket = await common.connect();
-      socket.send(want);
+      socket.emit('message', want);
       assert.deepEqual(await got, want);
     });
 
@@ -398,7 +398,7 @@ describe(__filename, function () {
       const AckErr = class extends Error {
         constructor(name, ...args) { super(...args); this.name = name; }
       };
-      socket.send(message,
+      socket.emit('message', message,
           (errj, val) => errj != null ? reject(new AckErr(errj.name, errj.message)) : resolve(val));
     });