controller not rendering existing js.erb file

In my PlaceController, I have a search method, called remotely from a form

the method is executed, but rendering is not executed as the template is stated as missing …

but it’s there …

post :search, :locale => I18n.locale, :format => :js, :country => “United”

Error: test_should_search_places(Backoffice::PlacesControllerTest)

ActionView::MissingTemplate: Missing template backoffice/places/search with {:locale=>[:en], :formats=>[:js, :html], :handlers=>[:erb, :builder, :coffee, :haml]}. Searched in:

and I have a template in my views located at :

views / backoffice/ places / search.js.erb

what could be wrong ? where should I look for any clue ?

thanks

template created manually as "search.js.erb " the trailing space was invisible