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

class TestResolvResource < Test::Unit::TestCase
  def setup
    address = "192.168.0.1"
    @name1 = Resolv::DNS::Resource::IN::A.new(address)
    @name1.instance_variable_
    
  def test_caa_flags
    assert_equal 255,
      Resolv::DNS::Resource::IN::CAA.new(255, 'issue', 'ca1.example.net').flags
    assert_raise(ArgumentError) do
      Resolv::DNS::Resource::IN::CAA.new(256, 'issue', 'ca1.example.net')
    end

    assert_raise(ArgumentError) do
      Resolv::DNS::Resource::IN::CAA.new(-1, 'issue', 'ca1.example.net')
    end
  end