How to test after_sign_in_path_for(resource)?

Question

I have devise authentication and registration set up on my Rails app. I'm using after_sign_in_path_for() to customise the redirect when the user signs in based on various scenarios.

What I'm asking is how to test this method? It seems hard to isolate since it is called automatically by Devise when the user signes in. I want to do something like this:

describe ApplicationController do
  describe "after_sign_in_path_for" do
    before :each do
      @user = Factory :user
      @listing = Factory :listing
      sign_in @user
    end

    describe "with listing_id on the session" do
      before :each do
        session[:listing_id] = @listing.id
      end

      describe "and a user in one team" do
        it "should save the listing from the session" do
          expect {
            ApplicationController.new.after_sign_in_path_for(@user)
          }.to change(ListingStore, :count).by(1)
        end

        it "should return the path to the users team page" do
          ApplicationController.new.after_sign_in_path_for(@user).should eq team_path(@user.team)
        end
      end
    end
  end
end

but that's obviously not the way to do it because I just get an error:

 Failure/Error: ApplicationController.new.after_sign_in_path_for(@user)
 RuntimeError:
   ActionController::Metal#session delegated to @_request.session, but @_request is nil: #<ApplicationController:0x00000104581c68 @_routes=nil, @_action_has_layout=true, @_view_context_class=nil, @_headers={"Content-Type"=>"text/html"}, @_status=200, @_request=nil, @_response=nil>

So, how can I test this method?

Answer 1

Oddly, I was wondering this very thing today. Here's what I came up with. I created an anonymous subclass of ApplicationController. In this anonymous subclass, I exposed the protected methods that I wanted to test as public methods. Then I tested them directly.

describe ApplicationController do
  controller do
    def after_sign_in_path_for(resource)
        super resource
    end
  end

  before (:each) do
    @user = FactoryGirl.create(:user)
  end

  describe "After sigin-in" do
    it "redirects to the /jobs page" do
        controller.after_sign_in_path_for(@user).should == jobs_path
    end
  end

end