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

class TestMkmfSignedness < TestMkmf
  def test_typeof_builtin
    bug4144 = '[ruby-dev:42731]'
    [["", "-1"], ["signed ", "-1"], ["unsigned ", "+1"]].each do |signed, expect|
      %w[short int long].each do |type|
        assert_equal(expect.to_i, mkmf {check_signedness(signed+type)}, mkmflog(bug4144))
      end
    end
  end

  def test_typeof_typedef
    [["", "-1"], ["signe
    
  def test_typeof_typedef
    [["", "-1"], ["signed ", "-1"], ["unsigned ", "+1"]].each do |signed, expect|
      %w[short int long].each do |type|
        open("confdefs.h", "w") {|f|
          f.puts "typedef #{signed}#{type} test1_t;"
        }
        $defs.clear
        assert_equal(expect.to_i, mkmf {check_signedness("test1_t", "confdefs.h")}, MKMFLOG)
        assert_include($defs, "-DSIGNEDNESS_OF_TEST1_T=#{expect}")
      end
    end
  ensure
    File.unlink("confdefs.h")
  end