Factory

Building JavaScript objects inspired by rosie and factory_girl.

Factory can integrate with JavaScript framework persistence layer through Adapters.

Setup for Ember.js

Call Factory.setupForEmber(App) before factory definitions. See live example at jsbin

NOTE: You need to call Factory.reset() to reset sequences for each test run.

Usage

Factory.define('vote', function() {
  this.sequence('id');
  this.attr('value', 0);
  this.trait('up', function() {
    return this.attr('value', 1);
  });
  return this.trait('down', function() {
    return this.attr('value', -1);
  });
});

Factory.define('post', function() {
  this.sequence('id');
  this.sequence('title', function(i) {
    return "Post " + i;
  });
  this.attr('content', null);
  this.hasMany('votes', 'vote');
  return this.after(function() {
    if (!this.content) {
      return this.content = "" + this.title + " content";
    }
  });
});

Factory.define('category', function() {
  this.sequence('id');
  this.sequence('name', function(i) {
    return "Category " + i;
  });
  this.ignore('postsCount', 0);
  return this.after(function(attributes) {
    return this.posts = Factory.buildList('post', attributes.postsCount);
  });
});

NOTE: looks better with CoffeeScript ;-)

Build with no attributes

Factory.build('post')

result:

{
  "id":1,
  "title":"Post 1",
  "content":"Post 1 content"
}

Build with attributes

Factory.build('post', {content: 'my content'})

result:

{
  "id":1,
  "title":"Post 1",
  "content":"my content"
}

Build with ignored attribute and after() callback

Factory.build('category',{name: 'First category', postsCount: 2})

result:

{
  "name":"First category",
  "id":1,
  "posts":[
    {"id":1,"title":"Post 1","content":"Post 1 content"},
    {"id":2,"title":"Post 2","content":"Post 2 content"}
  ]
}

Build post with votes count

Factory.build('post', {votes: 2})

result:

{
  "content" : "Post 1 content",
  "id" : 1,
  "title" : "Post 1",
  "votes" : [
      {"id":1,"value":1},
      {"id":2,"value":1}
    ]
}

Build post with votes traits or attributes

Factory.build('post', {votes: ['up', 'down', 'up']})

or

Factory.build('post', {votes: [{value: 1}, {value: -1}, {value: 1}]})

result:

{
  "content" : "Post 1 content",
  "id" : 1,
  "title" : "Post 1",
  "votes" : [
      {"id":1,"value":1},
      {"id":2,"value":-1},
      {"id":3,"value":1}
    ]
}

Adapters

By default factory is building JavaScript objects using default Factory.Adapter

class Factory.Adapter
  constructor: (factory) -> @factory = factory
  build: (name, attrs) -> attrs
  create: (name, attrs) -> attrs
  push: (name, object) -> @[name].push object

Factory integrates with Ember.js through Factory.EmberDataAdapter (used by Factory.setupForEmber(App))

class Factory.EmberDataAdapter extends Factory.Adapter
  build: (name, attrs) -> Ember.run => App.__container__.lookup('store:main').createRecord name, attrs
  create: (name, attrs) -> @build name, attrs
  push: (name, object) -> Ember.run => @get(name).addObject object

You can set adapter globally

Factory.adapter = Factory.YourAdapter

or per factory definition

Factory.define 'yourModel', ->
  @adapter Factory.YourAdapter

Contributing

git clone [email protected]:tb/factory.git
cd factory
npm install
grunt build