WebSockets

1import { randomString, randomIntBetween } from "https://jslib.k6.io/k6-utils/1.1.0/index.js";
2import ws from 'k6/ws';
3import { check, sleep } from 'k6';
4
5let sessionDuration = randomIntBetween(10000, 60000); // user session between 10s and 1m
6let chatRoomName = 'publicRoom'; // choose your chat room name
7
8export let options = {
9  vus: 10,
10  iterations: 10, 
11};
12
13export default function () {
14  let url = `wss://test-api.k6.io/ws/crocochat/${chatRoomName}/`;
15  let params = { tags: { my_tag: 'my ws session' } };
16
17  let res = ws.connect(url, params, function (socket) {
18    socket.on('open', function open() {
19      console.log(`VU ${__VU}: connected`);
20
21      socket.send(JSON.stringify({'event': 'SET_NAME', 'new_name': `Croc ${__VU}`}));
22
23      socket.setInterval(function timeout() {
24        socket.send(JSON.stringify({'event': 'SAY', 'message': `I'm saying ${randomString(5)}`}));
25      }, randomIntBetween(2000, 8000)); // say something every 2-8seconds
26    });
27
28    socket.on('ping', function () {
29      console.log('PING!');
30    });
31
32    socket.on('pong', function () {
33      console.log('PONG!');
34    });
35
36    socket.on('close', function () {
37      console.log(`VU ${__VU}: disconnected`);
38    });
39
40    socket.on('message', function (message){
41      let msg = JSON.parse(message);
42      if(msg.event === 'CHAT_MSG'){
43        console.log(`VU ${__VU} received: ${msg.user} says: ${msg.message}`)
44      }
45      else if(msg.event === 'ERROR'){
46        console.error(`VU ${__VU} received:: ${msg.message}`)
47      }
48      else{
49        console.log(`VU ${__VU} received unhandled message: ${msg.message}`)
50      }
51    });
52
53    socket.setTimeout(function () {
54      console.log(`VU ${__VU}: ${sessionDuration}ms passed, leaving the chat`);
55      socket.send(JSON.stringify({'event': 'LEAVE'}));
56
57    }, sessionDuration);
58
59    socket.setTimeout(function () {
60      console.log(`Closing the socket forcefully 3s after graceful LEAVE`);
61      socket.close();
62    }, sessionDuration+3000);
63  });
64
65  check(res, { 'Connected successfully': (r) => r && r.status === 101 });
66}