rails 3, rspec-rails, capybara, capybara-webkit, headless in order to run request specs that can test javascript

Gemfile

source 'https://rubygems.org'

gem 'rails', '3.2.0'

# Bundle edge Rails instead:
# gem 'rails', :git => 'git://github.com/rails/rails.git'

gem 'sqlite3'


# Gems used only for assets and not required
# in production environments by default.
group :assets do
  gem 'sass-rails',   '~> 3.2.3'
  gem 'coffee-rails', '~> 3.2.1'

  # See https://github.com/sstephenson/execjs#readme for more supported runtimes
  # gem 'therubyracer'

  gem 'uglifier', '>= 1.0.3'
end

gem 'jquery-rails'

# To use ActiveModel has_secure_password
# gem 'bcrypt-ruby', '~> 3.0.0'

# To use Jbuilder templates for JSON
# gem 'jbuilder'

# Use unicorn as the web server
# gem 'unicorn'

# Deploy with Capistrano
# gem 'capistrano'

# To use debugger
# gem 'ruby-debug19', :require => 'ruby-debug'
group :development, :test do
  gem 'rspec-rails'
  gem 'capybara'
  gem 'capybara-webkit'
  gem 'headless'
  gem 'database_cleaner'
end

search_comment_spec.rb

require 'spec_helper'

describe 'Search' do
  context 'when logged in' do
    # :js => true means JavaScript will execute
    describe 'search result add comment link', :js => true do 

      it 'shows user comment form' do
        search_for shared_keyword
        within('#search-results') do
          click_link('Add Comment')
          page.should have_content('Share your ideas')
        end
      end

    end
  end
end

spec_helper.rb

# This file is copied to spec/ when you run 'rails generate rspec:install'
ENV["RAILS_ENV"] ||= 'test'
require File.expand_path("../../config/environment", __FILE__)
require 'rspec/rails'
require 'capybara/rspec'
require 'capybara-webkit'
require 'headless'
require 'database_cleaner'
 
# Requires supporting ruby files with custom matchers and macros, etc,
# in spec/support/ and its subdirectories.
Dir[Rails.root.join("spec/support/**/*.rb")].each {|f| require f}

RSpec.configure do |config|
  Capybara.javascript_driver = :webkit
 
  config.use_transactional_fixtures = false

  config.before(:suite) do
    # Use the headless gem to manage your Xvfb server
    # Do not destroy X server incase another process is using it
    Headless.new(:destroy_on_exit => false).start
    DatabaseCleaner.strategy = :truncation
  end

  config.before(:each) do
    DatabaseCleaner.start
  end

  config.after(:each) do
    DatabaseCleaner.clean
  end

end