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_convertible.rb
    path of file: ./repos/truffleruby/test/mri/tests/mkmf
    
    the code of the file until where you have to start completion: # frozen_string_literal: false
require_relative 'base'

class TestMkmfConvertible < TestMkmf
  def test_typeof_builtin
    ["", ["
    
  def test_typeof_builtin
    ["", ["signed ", ""], "unsigned "].each do |signed, prefix|
      %w[short int long].each do |type|
        assert_equal((prefix || signed)+type,
                     mkmf {convertible_int(signed+type)}, MKMFLOG)
      end
    end
  end