In Rails, how do you functional test a Javascript response format?
Pass in a :format
with your normal params to trigger a response in that format.
get :index, :format => 'js'
No need to mess with your request headers.
with rspec:
it "should render js" do xhr :get, 'index' response.content_type.should == Mime::JSend
and in your controller action:
respond_to do |format| format.jsend
Set the accepted content type to the type you want:
@request.accept = "text/javascript"
Combine this with your get :index
test and it will make the appropriate call to the controller.