role scoped pundit spec for rspec 3

admin_policy_spec.rb

# -*- encoding : utf-8 -*-
# attempting to get something like http://thunderboltlabs.com/blog/2013/03/27/testing-pundit-policies-with-rspec again
require 'rails_helper'

RSpec.describe AdminPolicy, type: :policy do
  subject { AdminPolicy }

  def self.permits(action)
    permissions action do
      it { expect(subject).to permit(current_admin, admin)    }
    end
  end

  def self.doesnt_permit(action)
    permissions action do
      it { expect(subject).not_to permit(current_admin, admin)    }
    end
  end

  context "for a product owner" do
    let(:current_admin) { create :product_owner }

    context "creating a new admin" do
      let(:admin) { Admin.new }
      permits :new?
      permits :create?
    end
    
    context "accessing themselves" do
      let(:admin) {current_admin}
      permits :show?
      permits :edit?
      permits :update?
      doesnt_permit :destroy?
    end

    context "accessing another admin" do
      let(:admin) { Admin.new }
      permits :show?
      permits :edit?
      permits :update?
      doesnt_permit :destroy?
    end
  end

  context "for a question contributor" do
    let(:current_admin) { create :question_contributor }
    context "creating a new admin" do
      let(:admin) { Admin.new }
      doesnt_permit :new?
      doesnt_permit :create?
    end

    context "accessing themselves" do
      let(:admin) {current_admin}
      permits :show?
      permits :edit?
      permits :update?
      doesnt_permit :destroy?
    end

    context "accessing another admin" do
      let(:admin) { Admin.new }
      doesnt_permit :show?
      doesnt_permit :edit?
      doesnt_permit :update?
      doesnt_permit :destroy?
    end
  end

  context "for a non role" do
    let(:current_admin) { build :admin }
    context "creating a new admin" do
      let(:admin) { Admin.new }
      doesnt_permit :new?
      doesnt_permit :create?
    end

    context "accessing themselves" do
      let(:admin) {current_admin}
      permits :show?
      doesnt_permit :edit?
      doesnt_permit :update?
      doesnt_permit :destroy?
    end

    context "accessing another admin" do
      let(:admin) { Admin.new }
      doesnt_permit :show?
      doesnt_permit :edit?
      doesnt_permit :update?
      doesnt_permit :destroy?
    end
  end
end