RSpec + Capybara as Cucumber replacement.

account_management_helpers.rb

# -*- encoding : utf-8 -*-

# spec/support/features/helpers/account_management_helpers.rb

module Features
  module Helpers
    module AccountManagementHelpers
      private
      def when_visit_account_page
        visit account_path(@account)
      end

      def and_fill_in_account_form_with(data)
        within('form#edit_account') do
          data.each do |field, value|
            fill_in field.to_s.titleize, with: value
          end

          click_button 'Update account'
        end
      end

      def user_sees_notice(text)
        expect(page).to have_css('div#flash.notice', text: text)
      end

      def it_should_be_forbidden
        expect(page.status_code).to be(403)
        expect(page).to have_content('Only the account holder can make changes.')
      end
    end
  end
end

login_helpers.rb

# -*- encoding : utf-8 -*-

# spec/support/features/helpers/login_helpers.rb

module Features
  module Helpers
    module LoginHelpers
      def login_as(user, password = 'secret')
        visit login_path

        fill_in 'Email Address', with: user.email
        fill_in 'Password',      with: password
        click_button 'Log in'
      end
    end
  end
end

manage_account_spec.rb

# -*- encoding : utf-8 -*-

# spec/features/manage_account_spec.rb

require 'spec_helper'

feature 'Account holder manages account' do
  include Features::Helpers::AccountManagementHelpers

  background do
    @account = create(:account)
  end
  
  scenario 'Account holder changes the account name' do
    login_as @account.holder

    when_visit_account_page
    and_fill_in_account_form_with(name: 'Acme Inc.')

    user_sees_notice(%(Your account has been successfully updated.))
  end
  
  scenario 'A common user cannot access to the account management' do
    login_as create(:user)

    when_visit_account_page
    it_should_be_forbidden
  end
end

spec_helper.rb

# -*- encoding : utf-8 -*-

# spec/spec_helper.rb

ENV["RAILS_ENV"] = 'test'
require File.expand_path("../../config/environment", __FILE__)
require 'rspec/rails'
require 'capybara/poltergeist'

# 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|
  config.fail_fast = true
  config.infer_base_class_for_anonymous_controllers = false

  with_options(type: :feature) do |rspec|
    rspec.config.before(:all) do
      Capybara.default_host      = 'http://test.host'
      Capybara.javascript_driver = :poltergeist
    end

    rspec.config.include FactoryGirl::Syntax::Methods
    rspec.config.include Features::Helpers::LoginHelpers
  end
end