You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: test_sorted_set.rb
    path of file: ./repos/artichoke/artichoke-backend/vendor/ruby/test
    
    the code of the file until where you have to start completion: # frozen_string_literal: false
require 'test/unit'
require 'set'

class TC_SortedSet < Test::Unit::TestCase
  def base_dir
   
    
  def test_ok_require
    assert_runs <<~RUBY, options: ['-I', "#{__dir__}/fixtures/fake_sorted_set_gem"]
      require "set"
      require "sorted_set"

      var = SortedSet.new.to_s
    RUBY
  end