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: flag_test.rb
    path of file: ./repos/open-build-service/src/api/test/unit
    
    the code of the file until where you have to start completion: require_relative '../test_helper'

class FlagTest < ActiveSupport::TestCase
  fixtures :all

  def test_validation
    # only a flag with a set project_id OR package_id can be saved!
    f = Flag.new(p
    
  def test_to_xml_error
    # if no flagstatus set, an error should be raised!
    f = Flag.new(project: projects(:home_Iggy), architecture: architectures(:i586), repo: '999.999')
    f.flag = 'build'
    assert_equal false, f.save
    f.status = 'enabled'
    assert_equal false, f.save
    f.status = 'enable'
    assert_equal true, f.save

    f = Flag.find_by_repo('999.999')
    assert_kind_of Flag, f

    builder = Nokogiri::XML::Builder.new
    f.to_xml(builder)
    assert_xml_tag builder.to_xml, tag: 'enable', attributes: { repository: '999.999', arch: 'i586' }
  end