WaleedAshraf

How to mock express session?

sinon is being used to mock methods in tests. It is one of the most used package for testing. But Is there a way to mock session objects in tests for express?

I'm working on a project where I upload images to s3 in bulk (albums) and than further apply some processing like resizing/compression/editing on them.

It's a express app with middlewares for authorization, authentication, setting context and is working fine. Recently I started adding testcases for different routes using mocha. I'm using cookie-session for session handling in app.

For one route, I needed to mock req.session object. (Need to set it's value before calling the other route.)

WaleedAshraf

exports.create = function(req, res) {
  // upload image to s3
  var photos = PhotosTable.create(req.files.names); // add entries in database
  req.session.count = photos.length; // set count in req.session
  res.redirect(`api/image/submit`);
}

WaleedAshraf

exports.submit = function(req, res) {
  if (req.session.count && req.session.count > 0) { // get count from req.session
    // perform further tasks
    res.sendStatus(200); 
  } else {
    res.sendStatus(400); 
  }
}

WaleedAshraf

// name = "my-session" ->  base64 value of required object (cookie)
// name.sig = "my-session.sig" -> signed value of cookie using Keygrip

let cookie = Buffer.from(JSON.stringify({"count":2})).toString('base64'); // base64 converted value of cookie

let kg = Keygrip(['testKey']) // same key as I'm using in my app
let hash = kg.sign('my-session=' + cookie);

await request(app).get('api/image/submit').set("Accept", "text/html")
    .set('cookie', ['my-session=' + cookie + '; ' + 'my-session.sig=' + hash + ';'])

WaleedAshraf

exports.submit = function(req, res) {         
  if(req.session.count && req.session.count > 0) { // true                      
    //do something                
    res.sendStatus(200);                    
  }
}

WaleedAshraf

var cluster = require('cluster');
const numCPUs = require('os').cpus().length;

module.exports.create = function(options, callback){
  
  if (cluster.isMaster) {
    // fork child process for notif/sms/email worker
    global.smsWorker    = require('child_process').fork('./smsWorker');
    global.emailWorker  = require('child_process').fork('./emailWorker');
    global.notifiWorker = require('child_process').fork('./notifWorker');

WaleedAshraf

var cluster = require('cluster');
const numCPUs = require('os').cpus().length;

module.exports.create = function(options, callback){
  
  if (cluster.isMaster) {
    // fork child process for notif/sms/email worker
    global.smsWorker    = require('child_process').fork('./smsWorker');
    global.emailWorker  = require('child_process').fork('./emailWorker');
    global.notifiWorker = require('child_process').fork('./notifWorker');

WaleedAshraf

var cluster = require('cluster');
const numCPUs = require('os').cpus().length;

module.exports.create = function (options, callback) {

  if (cluster.isMaster) { 
    // fork child process for notif/sms/email worker
    global.smsWorker    = require('child_process').fork('./smsWorker');
    global.emailWorker  = require('child_process').fork('./emailWorker');
    global.notifiWorker = require('child_process').fork('./notifWorker');

WaleedAshraf

process.on('message', function(data) {
  sendSMS(data); // use twilio or something to send sms
});

WaleedAshraf

var pm2Config = {
    "apps": [
      {
        "name": "app",
        "script": "app.js",
        "exec_mode": "cluster_mode",
        "instances": "max"
      },
      {
        "name": "smsWorker",