gistfile1.js

var ioClient = require('socket.io-client')
var should = require('should');
var chai = require('chai');

var options ={
    transports: ['websocket'],
    'force new connection': true,
    'reconnection delay' : 0,
    'reopen delay' : 0
};

var socketUrl = 'http://localhost:3000';

describe('chat server', function() {
    
    // The maintaining-state issue is fixed by using beforeEach()
    // to create a new ioServer.
    beforeEach(function(done) {
        console.log('before called');
        var ioServer = require('../index.js');
        done();
    });

    // Overkill, I think, to set ioServer back to null after each test.

    // afterEach(function(done) {
    //     console.log('after called')
    //     var ioServer = null;
    //     done();
    // })

    // 'user join' event should receive 'login' event
    it('should emit "user joined" and receive "login"', function(done) {        

        // I thought it might be useful to define all the clients at the bottom
        // of the describe function, but this seems to work fine, as well
        // as being easier to read and isolating variable to their test cases.

        var client1 = ioClient(socketUrl, options);
        client1.on('connect', function () {
            console.log('test client 1 connected');
            
            client1.on('user joined', function (data) {
                console.log('test client got a user joined event');
            });
            client1.on('login', function (data) {
                console.log('test client got a login event');
                chai.assert.equal(data.numUsers, 1)
                client1.disconnect();
                done();
            })
            client1.emit('add user', 'Foobert');
        });
    });

    // 2 clients log in, one client sends a message, the other client gets it.
    it('should dispatch chat messages from client2 to client3', function (done) {
        var client2 = ioClient(socketUrl, options);
        var client3 = ioClient(socketUrl, options);
        client2.on('connect', function () {
            console.log('test client 2 connected');
            client3.on('connect', function () {
                console.log('test client 3 connected');
                client2.emit('new message', 'Hello Donovan!');
                client3.on('new message', function (data) {
                    chai.assert.equal(data.message, 'Hello Donovan!');
                    client2.disconnect();
                    client3.disconnect();
                    done();
                });
            })
        });
    });
    
});