FactoryGirl

To find out what does factory girl do in console:

1. require “factory_girl” => require the gem
2. require “./factories” => require the setting of the factory girl
3. include FactoryGirl::Syntax::Methods

After Step 2, we can use FactoryGirl.new, FactoryGirl.create, but we can user some syntax sugar by include ‘FactoryGirl::Syntax::Methods’

• build(:user)
• attributes_for(:user)
• attributes_for_pair(:user) =>used for relationship, it contains object_id
• build_stubbed(:user)

If you need a uniq data, you can use: sequence

factory :user do
  name 'John'  => do not be uniq
  sequence(:email) {|n| "#{n}@example.com"  =>  must be uniq
end

https://github.com/thoughtbot/factory_girl/blob/master/GETTING_STARTED.md#configure-your-test-suite