How to mock request and response in nodejs to test middleware/controllers?

Question

My application has several layers: middleware, controllers, managers. Controllers interface is identical to middlewares one: (req, res, next).

So my question is: how ca

Answer 1

Since JavaScript is a dynamically typed language you can create mock objects and passing them to your controllers as follow:

var req = {};
var res = {};
var next = function(err) {console.log('lala')}
controller.get_user(req, res, next)

If your controller needs a particular piece of data or functionality from your request or response object you'll need to provide such data or functionality in your mocks. For example,

var req = {};
req.url = "http://google.com"; // fake the Url

var res = {};
res.write = function(chunk, encoding) { 
  // fake the write method 
};

var next = function(err) {console.log('lala')}
controller.get_user(req, res, next)