ActionController::UrlWriter removed without deprecation

Any idea on what the replacement for this is?

Back in Rails 2 I found that my sweepers didn't have access to named URL helper methods when running under the test environment. So I got around this by doing:

include ActionController::UrlWriter

in my sweepers.

Under Rails 3 I observe the same behaviour: named URL helper methods don't work in sweepers (they all return nil). I think this is because some method_missing magic is going on in actionpack/lib/action_controller/caching/sweeping.rb:

def method_missing(method, *arguments, &block)
  return if @controller.nil?
  @controller.__send__(method, *arguments, &block)
end

For some reason, under the test environment, the helper methods are not included and there is no real @controller object here when the sweeper is called. So a sweeper which does something like:

expire_page(product_path(product) + '.html')

Ends up evaluating it like this:

expire_path(nil + '.html')

Which obviously doesn't work.

No idea why, but under development and production environments, the helper methods are included, and so the "method_missing" stuff never kicks in and calls to methods like "product_path(product)" work fine in the sweeper.

So this seems like long-standing behavior, and under Rails 2 I could work around it by explicitly including UrlWriter. Wondering what I should be doing to get the same kind of workaround in Rails 3.

Ok, via some lucky grepping found this:

# this is the Rails 2 way
include ActionController::UrlWriter

# this is the Rails 3 equivalent
include Rails.application.routes.url_helpers