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_case_options.rb
    path of file: ./repos/artichoke/artichoke-backend/vendor/ruby/test/ruby/enc
    
    the code of the file until where you have to start completion: # Copyright © 2016 Kimihito Matsui (松井 仁人) and Martin J. Dürst (duerst@it.aoyama.ac.jp)

require "test/unit"

class TestCaseOptions < Test::Unit::TestCase
  def assert_raise_functional_operations(arg, *options)
    assert_raise(ArgumentError) 
    
  def test_option_errors
    assert_raise_both_types :invalid
    assert_raise_both_types :lithuanian, :turkic, :fold
    assert_raise_both_types :fold, :fold
    assert_raise_both_types :ascii, :fold
    assert_raise_both_types :fold, :ascii
    assert_raise_both_types :ascii, :turkic
    assert_raise_both_types :turkic, :ascii
    assert_raise_both_types :ascii, :lithuanian
    assert_raise_both_types :lithuanian, :ascii
  end