## app/controllers/public_controller.rb
class PublicController < ApplicationController
end

## app/controllers/events_controller.rb
class EventsController < ApplicationController
end

## spec/controllers/public_controller_spec.rb
require 'spec_helper'

describe PublicController do
  describe 'about' do
    before do
      get :about
    end

    it 'should render the about template' do
      response.should render_template(:about)
    end
  end
end

## spec/controllers/events_controller_spec.rb
require 'spec_helper'

describe EventsController do
  describe 'index' do
    before do
      get :index
    end

    it 'should render the index template' do
      response.should render_template(:index)
    end
  end
end

## `rake spec:controllers`
F.

Failures:

  1) EventsController index should render the index template
     Failure/Error: response.should render_template(:index)
       Expected block to return true value.
     # ./spec/controllers/events_controller_spec.rb:11:in `block (3 levels) in <top (required)>'