Helper for setting cookies with Capybara for both Selenium and Webkit

cookie_helper.rb

module CookieHelper
  def set_cookie(name, value)
    driver = Capybara.current_session.driver

    case driver
    when Capybara::Selenium::Driver
      driver.browser.manage.add_cookie(name: name, value: value)
    when Capybara::Webkit::Driver
      driver.browser.set_cookie("#{name}=#{value}; domain=127.0.0.1; path=/")
    end
  end
end