rails-locale-default_url_options.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'
  # Activate the gem you are reporting the issue against.
  gem 'rails', '5.0.0'
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.i18n.available_locales = [:fr, :en]
  config.i18n.default_locale = :en

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

  routes.draw do
    scope '(:locale)' do
      root to: 'test#index'
    end
  end
end

class TestController < ActionController::Base
  include Rails.application.routes.url_helpers
  
  def default_url_options
    { locale: I18n.locale }
  end

  def index
    I18n.with_locale(:fr) { root_path }
    render plain: root_path
  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
    I18n.backend.store_translations(:fr , { test: 'FR' } )
    I18n.backend.store_translations(:en , { test: 'EN' } )
    
    get '/'
    assert_equal '/en', last_response.body
    assert last_response.ok?
  end

  private
    def app
      Rails.application
    end
end