A spec for a filter

privacy_filter.rb

class PrivacyFilter
  class << self 
    def filter(controller)
      @controller = controller

      first_article? or administrator? or user?
    end
    
    def first_article?
      @controller.params[:id] == 1
    end

    def administrator?
      @controller.authenticate_administrator!
    end

    def user?
      @controller.authenticate_user!
    end
  end
end

privacy_filter_spec.rb

require "app/models/privacy_filter"

describe PrivacyFilter do
  let(:controller) do
    mock("controller", :frist_post? => false,
                       :authenticate_administrator! => false,
                       :authenticate_user! => false)
  end

  it "allows access to the root article" do
    # Note - changed to ask the controller, not poke at the params directly
    controller.should_receive(:frist_post?)
    PrivacyFilter.filter(controller)
  end

  it "allows access for administrators" do
    controller.should_receive(:authenticate_administrator!)
    PrivacyFilter.filter(controller)
  end

  it "allows access to users" do
    controller.should_receive(:authenticate_user!)
    PrivacyFilter.filter(controller)
  end
end