Bug templates for Rails Engine Issue #20738 - assertions last passed on Rails Version 4.1.9

rails_bug_20738.rb

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'
  gem 'rails', '4.1.9'
end

require 'rack/test'
require 'action_controller/railtie'
require 'rails/engine'

module Blog
  class MyEngine < Rails::Engine
    def self.inspect
      "Blog::Engine"
    end

    def config
      @config ||= Configuration.new
    end

    routes.draw do
      resources :posts do
        resources :comments
      end
    end
  end

  class PostsController < ActionController::Base
    def index
    end
  end
end

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
    get '/' => 'test#index'

    mount Blog::MyEngine => "/blog", as: "blog"
    namespace :blog do
      resources :news_stories
    end
  end
end

class Blog::NewsStoriesController < ActionController::Base
  include Rails.application.routes.url_helpers
  include ActionDispatch::Routing::RouteSet::MountedHelpers

  def index
    # on rails 4.1.9
    # [1] pry(#<Blog::NewsStoriesController>)> blog.posts_path
    # => "/blog/posts"

    # on rails 4.2.0
    # [1] pry(#<Blog::NewsStoriesController>)> blog.posts_path
    # => "/posts"
    redirect_to blog.posts_path
  end
end

require 'minitest/autorun'

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

class Blog::NewsStoriesControllerTest < ActionController::TestCase
  include Rack::Test::Methods

  test "should redirect to the expected location" do
    response = get '/blog/news_stories'
    assert_equal 302, response.status
    assert_equal response.headers["location"], "http://example.org/blog/posts"
  end

  private
  def app
    Rails.application
  end
end

# Running:

I, [2015-09-12T04:58:32.800335 #7801]  INFO -- : ------------------------------------------------------------------------------
I, [2015-09-12T04:58:32.800400 #7801]  INFO -- : Blog::NewsStoriesControllerTest: test_should_redirect_to_the_expected_location
I, [2015-09-12T04:58:32.800413 #7801]  INFO -- : ------------------------------------------------------------------------------
D, [2015-09-12T04:58:32.816405 #7801] DEBUG -- :
D, [2015-09-12T04:58:32.816447 #7801] DEBUG -- :
I, [2015-09-12T04:58:32.816740 #7801]  INFO -- : Started GET "/blog/news_stories" for 127.0.0.1 at 2015-09-12 04:58:32 +0100
.

Finished in 0.027469s, 36.4050 runs/s, 72.8101 assertions/s.

1 runs, 2 assertions, 0 failures, 0 errors, 0 skips