Spec for the code technique described in http://blog.obiefernandez.com/content/2012/02/metaprogramming-your-activerecord-objects-at-runtime.html

special_nomination_spec.rb

# See http://blog.obiefernandez.com/content/2012/02/metaprogramming-your-activerecord-objects-at-runtime.html for an explanation

require 'spec_helper'

describe Nomination do
  let(:user1) { FactoryGirl.create(:user) }
  let(:user2) { FactoryGirl.create(:user_with_nominations_received) }
  let(:user3) { FactoryGirl.create(:user_with_nominations_received) }
  let(:user4) { FactoryGirl.create(:user) }
  let(:user5) { FactoryGirl.create(:user) }
  let(:params) { {:description => "Great Work!", :submitter => user1} }

  context "Teamwork Props" do
    let(:teamwork_props) do
      returning(FactoryGirl.create(:award, name: "Teamwork")) do |award|
        award.modifier_expr = <<-EOF
          def normal_validations
            if users.size == 1 && users.include?(submitter)
              errors.add(:user_ids, "You can't give Teamwork Props to only yourself")
            end
          end
        EOF
      end
    end
    it "can include the submitter and another recipient" do
      nomination = Nomination.create params.merge(award: teamwork_props, :user_ids => [user1.id, user2.id])
      nomination.should be_valid
    end
    it "cannot include only the submitter" do
      nomination = Nomination.create params.merge(award: teamwork_props, :user_ids => [user1.id])
      nomination.should_not be_valid
    end
    it "mod doesn't affect another unrelated award" do
      nomination = Nomination.create params.merge(award: FactoryGirl.create(:award, name: "Thank You"), :user_ids => [user1.id, user2.id])
      nomination.should_not be_valid
    end
  end

  context "Dynamic Duo" do
    let(:dynamic_duo_props) do
      returning(FactoryGirl.create(:award, name: "Dynamic Duo")) do |award|
        award.modifier_expr = <<-EOF
          def normal_validations
            if users.size == 1 && users.include?(submitter)
              errors.add(:user_ids, "You can't give Teamwork Props to only yourself")
            end
            if users.size != 2
              errors.add(:user_ids, "You can only give Dynamic Duo to two recipients at a time.")
            end
          end
        EOF
      end
    end
    it "can include the submitter and another recipient" do
      nomination = Nomination.create params.merge(award: dynamic_duo_props, :user_ids => [user1.id, user2.id])
      nomination.should be_valid
    end
    it "cannot include only the submitter" do
      nomination = Nomination.create params.merge(award: dynamic_duo_props, :user_ids => [user1.id])
      nomination.should_not be_valid
    end
    it "cannot have more than two recipients" do
      nomination = Nomination.create params.merge(award: dynamic_duo_props, :user_ids => [user1.id, user2.id, user3.id])
      nomination.should_not be_valid
    end
    it "mod doesn't affect another unrelated award" do
      nomination = Nomination.create params.merge(award: FactoryGirl.create(:award, name: "Thank You"), :user_ids => [user1.id, user2.id])
      nomination.should_not be_valid
    end
  end
end