js-factories
v1.1.1
Published
Object factory to create dynamic test fixtures
Downloads
7,236
Maintainers
Readme
js-factories
js-factories is a library to use dynamic fixtures using Factories in javascript/coffeescript. Ideal to combine using Mocha/chai frameworks and test rich classes for MV** Frameworks like Backbone.js
Usage
Include js-factories.js
in your test suite.
Factory support is added to quickly be able to build models or other objects as you see fit:
Factory.define 'user', (attributes = {}) ->
new User attributes
Factory.create 'user', name: 'Matthijs'
Factory.createList 10, 'user', name: 'Matthijs'
Traits
you can also use 'traits'. Traits are flags that are set when the user calls create with the factory name prefixed with terms separated by dashes.
Like: 'female-admin-user'
This will call the 'user' factory, and provide the terms 'female' and 'admin' as traits for this user
this list is accessible in the factory callback using this.traits
There are 2 helper methods to help check if traits are set:
this.trait('returns', 'one', 'of', 'these', 'values')
and
this.is('admin') # returns a boolean value
Extended example:
Factory.define 'user', (attributes = {}) ->
attributes.gender = @trait('male', 'female') || 'male'
returningClass = User
if @is('admin')
returningClass = AdminUser
new returningClass attributes
Factory.create 'user', name: 'Matthijs' # => new User name: 'Matthijs'
Factory.create 'male-user', name: 'Matthijs' # => new User name: 'Matthijs', gender: 'male'
Factory.create 'male-admin-user', name: 'Matthijs' # => new AdminUser name: 'Matthijs', gender: 'male'
Factory.create 'female-user', name: 'Beppie' # => new User name: 'Beppie', gender: 'female'
Sequences
Sequences are also supported:
Factory.define 'counter', ->
{
amount: @sequence('amount')
other: @sequence('other')
}
This does not conflict with similar names in other factory definitions.
You can also yield results:
Factory.define 'abc', ->
@sequence (i) -> ['a','b','c'][i]
# results in:
Factory.create('abc') => 'a'
Factory.create('abc') => 'b'
Sampling
You can sample a value from a list
Factory.define 'sampler', ->
@sample 'a', 'b', 'c'
Will randomly return a, b or c every time
License
Copyright (c) 2012-2014 Matthijs Groen
MIT License (see the LICENSE file)