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_http_request.rb
    path of file: ./repos/truffleruby/test/mri/tests/net/http
    
    the code of the file until where you have to start completion: # frozen_string_literal: false
require 'net/http'
require 'test/unit'

class HTTPRequestTest < Test::Unit::TestCase

  def test_initialize_GET
    req = Net::HTTP::Get.new '/'

    assert_equal 'GET', req.method
    assert_not_predicate req, :request_body_permitted?
    assert_predicate req, :response_body_permitted?

    expected = 
    
  def test_initialize_HEAD
    req = Net::HTTP::Head.new '/'

    assert_equal 'HEAD', req.method
    assert_not_predicate req, :request_body_permitted?
    assert_not_predicate req, :response_body_permitted?

    expected = {
      'accept'          => %w[*/*],
      "accept-encoding" => %w[gzip;q=1.0,deflate;q=0.6,identity;q=0.3],
      'user-agent'      => %w[Ruby],
    }

    assert_equal expected, req.to_hash
  end