require "isolation/abstract_unit" require "rails/command" require "rails/commands/server/server_command" module ApplicationTests class ServerTest < ActiveSupport::TestCase include ActiveSupport::Testing::Isolation def setup build_app end def teardown teardown_app end test "deprecate support of older `config.ru`" do remove_file "config.ru" app_file "config.ru", <<-RUBY require_relative 'config/environment' run AppTemplate::Application RUBY server = Rails::Server.new(config: "#{app_path}/config.ru") server.app log = File.read(Rails.application.config.paths["log"].first) assert_match(/DEPRECATION WARNING: Use `Rails::Application` subclass to start the server is deprecated/, log) end end end