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_gem_request_set_lockfile_tokenizer.rb
    path of file: ./repos/ruby-packer/ruby/test/rubygems
    
    the code of the file until where you have to start completion: # frozen_string_literal: true
require 'rubygems/test_case'
require 'rubygems/request_set'
require 'rubygems/request_set/lockfile'
require 'rubygem
    
  def test_tokenize_git
    write_lockfile <<-LOCKFILE
DEPENDENCIES
  a!
    LOCKFILE

    expected = [
      [:section, 'DEPENDENCIES',  0,  0],
      [:newline, nil,            12,  0],

      [:text,    'a',             2,  1],
      [:bang,    nil,             3,  1],
      [:newline, nil,             4,  1],
    ]

    assert_equal expected, tokenize_lockfile
  end