Cucumber capybara and rails asset pipeline in debug mode

features/support/env.rb

Capybara.server_port = 3001
Capybara.app_host = "http://localhost:3001"

ActionController::Base.asset_host = Capybara.app_host

config/environments/cucumber.rb

config.assets.enabled = true
config.assets.debug = true

---

Source: http://johnbintz.github.com/blog/2012/01/07/cucumber-capybara-asset-pipeline-debug-mode/