Rails issue #23640 test

begin
  require 'bundler/inline'
rescue LoadError => e
  $stderr.puts 'Bundler version 1.10 or later is required. Please update your Bundler'
  raise e
end

gemfile(true) do
  source 'https://rubygems.org'
  # Activate the gem you are reporting the issue against.
  gem 'rails', '4.2.0'
end

require 'rack/test'
require 'action_controller/railtie'

class TestApp < Rails::Application
  config.root = File.dirname(__FILE__)
  config.session_store :cookie_store, key: 'cookie_store_key'
  secrets.secret_token    = 'secret_token'
  secrets.secret_key_base = 'secret_key_base'

  config.logger = Logger.new($stdout)
  Rails.logger  = config.logger

  routes.draw do
    post '/' => 'test#index'
  end
end

class TestController < ActionController::Base
  include Rails.application.routes.url_helpers

  def index
    render json: params.permit(param1: [param2: [[[:attr, :op, :val]]]])
  end
end

require 'minitest/autorun'

# Ensure backward compatibility with Minitest 4
Minitest::Test = MiniTest::Unit::TestCase unless defined?(Minitest::Test)

class BugTest < Minitest::Test
  include Rack::Test::Methods

  def test_returns_success
    params = {"param1": {"param2": [[{"attr": "1","op": "<", "val": "2" }]] }}
    ac_params = ActionController::Parameters.new params

    assert_equal params.to_json, ac_params.permit(param1: [param2: [[[:attr, :op, :val]]]]).to_json
  end

  private
    def app
      Rails.application
    end
end