thoughtbot--factory_bot/spec/acceptance/parent_spec.rb

require 'spec_helper'
require 'acceptance/acceptance_helper'

describe "an instance generated by a factory that inherits from another factory" do
  before do
    define_model("User", :name => :string, :admin => :boolean, :email => :string)

    FactoryGirl.define do
      factory :user do
        name  "John"
        email "john@example.com"

        factory :admin do
          admin true
          email "admin@example.com"
        end
      end
    end
  end

  describe "the parent class" do
    subject     { FactoryGirl.create(:user) }
    it          { should_not be_admin }
    its(:email) { should == "john@example.com" }
  end

  describe "the child class" do
    subject     { FactoryGirl.create(:admin) }
    it          { should be_kind_of(User) }
    it          { should be_admin }
    its(:name)  { should == "John" }
    its(:email) { should == "admin@example.com" }
  end
end