Javascript mocking library for websockets and socket.io.
npm install mock-socket
To use within a node environment you can simply import or require the files directly. This option is great for phantomjs or CI environments.
// ES 2015:
const { WebSocket, Server, SocketIO } from 'mock-socket';
// ES5:
var mockWebSocket = require('mock-socket').WebSocket;
var mockServer = require('mock-socket').Server;
var socketIO = require('mock-socket').SocketIO;
// chat.js
function Chat() {
const chatSocket = new WebSocket('ws://localhost:8080');
this.messages = [];
chatSocket.onmessage = (event) => {
this.messages.push(event.data);
};
}
// chat-test.js
import { Server } from 'mock-socket';
describe('Chat Unit Test', () => {
it('basic test', (done) => {
const mockServer = new Server('ws://localhost:8080');
mockServer.on('connection', server => {
mockServer.send('test message 1');
mockServer.send('test message 2');
});
// Now when Chat tries to do new WebSocket() it
// will create a MockWebSocket object \
var chatApp = new Chat();
setTimeout(() => {
const messageLen = chatApp.messages.length;
assert.equal(messageLen, 2, '2 messages where sent from the s server');
mockServer.stop();
done();
}, 100);
});
});
// chat.js
function Chat() {
const chatSocket = new io('http://localhost:8080');
this.messages = [];
socket.on('chat-message', data => {
this.messages.push(data);
};
}
// chat-test.js
import { SocketIO, Server } from 'mock-socket';
describe('Chat Unit Test', () => {
it('basic test', (done) => {
const mockServer = new Server('http://localhost:8080');
mockServer.on('connection', server => {
mockServer.emit('chat-message', 'test message 1');
mockServer.emit('chat-message', 'test message 2');
});
/*
This step is very important! It tells our chat app to use the mocked
websocket object instead of the native one. The great thing
about this is that our actual code did not need to change and
thus is agnostic to how we test it.
*/
window.io = SocketIO;
// Now when Chat tries to do io() or io.connect()
// it will use MockSocketIO object
var chatApp = new Chat();
setTimeout(() => {
const messageLen = chatApp.messages.length;
assert.equal(messageLen, 2, '2 messages where sent from the server');
done();
}, 100);
});
});
The easiest way to work on the project is to clone the repo down via:
git clone [email protected]:thoov/mock-socket.git; cd mock-socket; npm i
Then to create a local build via:
npm run build
Then create a local npm link via:
npm link
At this point you can create other projects / apps locally and reference this local build via:
npm link mock-socket
from within your other projects folder. Make sure that after any changes you run npm run build
!
This project uses mocha as its test framework. Tests are located in /test and have 1 of 3 file name prefixes (functional-, issue-#, or unit-).
npm test
This project uses eslint and a rules set from airbnb's javascript style guides. To run linting:
npm run lint
Code coverage reports are created in /coverage after all of the tests have successfully passed.
If you have any feedback, encounter any bugs, or just have a question, please feel free to create a github issue or send me a tweet at @thoov.