register

# File actionpack/lib/action_dispatch/system_testing/driver.rb, line 30
        def register
          @browser.configure(&@capabilities)

          Capybara.register_driver @name do |app|
            case @name
            when :selenium then register_selenium(app)
            when :poltergeist then register_poltergeist(app)
            when :webkit then register_webkit(app)
            end
          end
        end