Rewire and Classes + Constructors + Prototypes

[basdag]

Hello everyone,

First I would like to thanks in advance for any help or guidance that could be provided. I am new with rewire and I wanted to mock up a class with a constructor and several prototypes. A really trivial example of what I am trying to do, is to mock User Class in the code bellow, I would appreciate any guidance.

---

User Class

function User(name) {
    this.name = name;
}

User.prototype.getName = function getName() {
    return this.name;
};

module.exports = User;

---

Company Module

var user = require('user');

var users = [];

exports.setUser = function setUser(firstName, lastName) {
    users.push(new User(firstName + lastName));
}

exports.getUser = function getUser(id) {
    return users[id].getName();
}

---

Test Module

var company = rewire('./company');

// Here is were I would need to mock the User class.
var userMock = {
    .... // How to set the User constructor?
    .... // Prototypes follow the same pattern as exports?
    getName: function getName() {
         // Testing code behavior with empty results for example
         return null;
    }
}

company.__set__('user', userMock);

Thanks in advance for your time and support

[ameykpatil]

@basdag How did you solve it? How do you mock constructors & protoypes using rewire? Any reference or link would be appreciated.

[jhnns]

@ameykpatil There should be no limitation. You can rewire just every variable. So in this case you just need to re-define the user variable with your mock:

function UserMock() {}

// Put your prototype methods here

company.__set__('user', UserMock);