heartcombo--devise/test/controllers/load_hooks_controller_test.rb

require 'test_helper'

class LoadHooksControllerTest < ActionController::TestCase
  setup do
    ActiveSupport.on_load(:devise_controller) do
      define_method :defined_by_load_hook do
        puts 'I am defined dynamically by activesupport load hook'
      end
    end
  end

  teardown do
    DeviseController.class_eval { undef :defined_by_load_hook }
  end

  test 'load hook called when controller is loaded' do
    assert DeviseController.instance_methods.include? :defined_by_load_hook
  end
end