is assert_select_rjs deprecated in Rails 3.1 ?

I have seen it in 3.0.9 doc (
http://apidock.com/rails/v3.0.9/ActionDispatch/Assertions/SelectorAssertions/assert_select_rjs
)
but it's not mentioned in the latest guide (
http://guides.rubyonrails.org/testing.html#integration-testing-examples)

if deprecated how can I check the view from an Ajax call
( assert_match + gsub could work ? ... )
am I missing any doc ?

xhr :get, :change_area, { :area => south_west.id}

thanks for feedback

I have seen it in 3.0.9 doc (http://apidock.com/rails/v3.0.9/ActionDispatch/Assertions/SelectorAss
)
but it's not mentioned in the latest guide (http://guides.rubyonrails.org/testing.html#integration-testing-examples)

All of rjs (including assert_select_rjs) was removed from rails 3.1
and extracted into prototype-rails ( https://github.com/rails/prototype-rails/
) plugin

Fred