Writing tests using FactoryGirl and validating presence of nested attributes (http://homeonrails.com/2012/10/validating-nested-associations-in-rails/) P.S. code not tested

companies.rb

require 'factory_girl'

FactoryGirl.define do
  factory :company do
    name "Twitter Corp."
    
    before(:create) do |company, evaluator|
      offices_attributes = []
      3.times do # 3 offices per company
        offices_attributes << attributes_for(:office)
      end
      company.offices_attributes = offices_attributes
    end
  end
end
 

offices.rb

require 'factory_girl'

FactoryGirl.define do
  factory :office do
    name "North America"
  end
end