factory-lady.js

Factory-lady is a factory library for Node.js / JavaScript inspired by Factory_girl. It works asynchronously and supports lazy attributes as well as associations.

It works as long as new keyword is used on the model to instantiate new objects and save method is used to persist objects. For example, Mongoose models follow such convention.

Installation

Node.js:

npm install factory-lady

To use Factory-lady in the browser or other JavaScript environments, just copy and include factory-lady.js under lib directory.

Defining Factories

JavaScript:

var Factory = require('factory-lady')
  , User    = require('../../app/models/user')
  , Post    = require('../../app/models/post');

var emailCounter = 1;

Factory.define('user', User, {
  email    : function(cb) { cb('user' + emailCounter++ + '@example.com'); } // lazy attribute
, state    : 'activated'
, password : '123456'
});

Factory.define('post', Post, {
  user_id  : Factory.assoc('user', 'id') // simply Factory.assoc('user') for user object itself
, subject  : 'Hello World'
, content  : 'Lorem ipsum dolor sit amet...'
});

CoffeeScript:

Factory = require 'factory-lady'
User    = require '../../app/models/user'
Post    = require '../../app/models/post'

emailCounter = 1

Factory.define 'user', User,
  email    : (cb) -> cb("user#{emailCounter++}@example.com") # lazy attribute
  state    : 'activated'
  password : '123456'

Factory.define 'post', Post,
  user_id  : Factory.assoc 'user', 'id' # simply Factory.assoc 'user' for user object itself
  title    : 'Hello World'
  content  : 'Lorem ipsum dolor sit amet...'

Using Factories