Taking Screenshots with Capybara and Webkit

screenshot.rb

require 'capybara'
require 'capybara/dsl'

Capybara.current_driver = :webkit

module Screenshot
  class Test
    include Capybara::DSL

    def take_screenshot(url)
      visit(url)
      page.save_screenshot("screenshot.png")
    end
  end
end

Screenshot::Test.new.take_screenshot("http://pornhub.com")

don't forget capybara and capybara-webkit gems