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_undef.rb
    path of file: ./repos/ruby/test/ruby
    
    the code of the file until where you have to start completion: # frozen_string_literal: false
require 'test/unit'

class Test
    
  def test_special_const_undef
    assert_raise(TypeError) do
      1.instance_eval do
        undef to_s
      end
    end
  end