Rails tests with activeadmin

I am using activeadmin on my Rails project and I would like to know how to make test on it. I looked over on internet but there is no documentation about it. I have a settings resource, and I disabled the possibility to create a new one or to delete it.

I would like to know how to test these routes doesn’t exists or another way to be sure it can’t be accessible. In my actual though I was trying to assert this page to be a 404 but the test seems to throw this error (which is what I tried to test !!!): ActionController::UrlGenerationError: No route matches {:action=>"new", :controller=>"admin/settings"}

I precise I DON’T USE RSPEC but MINITEST from Rails.

Thanks for your help !

My activeadmin file:

ActiveAdmin.register Setting do
    actions :all, except: [:new, :destroy]
    …
end

My tests:

require 'test_helper'

class Admin::SettingsControllerTest < ActionController::TestCase
   include Devise::TestHelpers
   setup :initialize_settings

   test 'should throw 404 if trying to access new action' do
     get :new
     assert_response 404
   end

   def initialize_settings
     sign_in users(:one)
   end
end

My project:

• Rails 4.2


• Ruby 2.2.0


• Minitest (NOT RSPEC)