How to rspec AbstractController methods?

I have two users, admin and local, i have assign update and delete method access to admin user only. Now i am trying to rspec my methods od active admin.

controller

def action_methods
      if current_admin_user.admin?
        super
      elsif current_admin_user.local?
        super - ['edit', 'destroy']
      else
        super
      end
    end

Rspec

it "should not allow agency admin to delete global tag" do
      @user.add_as_admin_of(@agency)
      delete admin_tag_path(@tag)
      expect(response).to have_http_status(404)#anything as per our requirment this is for show sample.
end

rspec is passing for admin as they can access all the CRUD operation, where as on local user it throws `Failure/Error: delete admin_tag_path(@tag)

 AbstractController::ActionNotFound:
   AbstractController::ActionNotFound`

which is correct because it can't access those method but how can i Test them in rails.