rails_helper.rb

# spec/helpers/rails_helper.rb

RSpec.shared_context "Authorization helpers" do
  let(:current_ability){
    Abilities::Base.new(user).tap do |ability|
      ability.can(:manage, :all)
    end
  }

  let(:user){
    build(:user)
  }
end

RSpec.shared_context "graphiti contexts", type: :resource do |parameter|
  let(:graphiti_context){
    OpenStruct.new.tap do |ctx|
      ctx.current_user = user
      ctx.current_ability = current_ability

      class << ctx
        delegate :authorize!, to: :current_ability
      end
    end
  }
end

module SharedContexts
  def self.included(klass)
    ::RSpec.configure do |rspec|
      rspec.include_context "Authorization helpers"
      rspec.include_context "graphiti contexts", type: :resource
    end
  end
end

RSpec.configure do |config|
  # ...
  config.include SharedContexts
  # ...
  config.before :each do
    # ...
    allow(Abilities::Factory).to receive(:ability_for).and_return(current_ability)
  end
end