find unused factories

gistfile1.rb

module FactoryGirl
  mattr_accessor :used_factories

  self.used_factories = []

  def self.factory_by_name(name)
    self.used_factories << name

    factories.find(name)
  end

  def self.unused_factories
    self.factories.map(&:name) - self.used_factories
  end
end

RSpec.configure do |config|
  config.after(:suite) do
    if FactoryGirl.unused_factories.present?
      puts "\nWARNING: You have #{FactoryGirl.unused_factories.count} unused factories: #{FactoryGirl.unused_factories}"
    end
  end
end