functional_controller_test.rb

require 'minitest_helper'
require 'action_controller' 

class ControllerStuff < ActionController::Base
  def create
    local_activity.action("yay!")
  end
end

class ControllerStuffTest < ActionController::TestCase
    def test_create
       get :index
       #post(:create, book: { title: "Love Hina" })
       assert_response :ok
    end
end