Capybara feature caching

spec_helper.rb

before(:each, :capybara_feature => true)
  @cache_store = ActionController::Base.cache_store
  ActionController::Base.perform_caching = true
  ActionController::Base.cache_store = :memory_store
end

after(:each, :capybara_feature => true)
  ActionController::Base.perform_caching = false
  ActionController::Base.cache_store = @cache_store
end