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_filesystem_tools.rb
    path of file: ./repos/nanoc/nanoc/test/data_sources
    
    the code of the file until where you have to start completion: # frozen_string_literal: true

require 'helper'

class Nanoc::DataSources::FilesystemToolsTest < Nanoc::TestCase
  def setup
    super
    skip_unless_
    
  def test_resolve_symlink
    File.write('foo', 'o hai')
    File.symlink('foo', 'bar')
    File.symlink('bar', 'baz')
    File.symlink('baz', 'qux')

    expected = File.expand_path('foo')
    actual   = Nanoc::DataSources::Filesystem::Tools.resolve_symlink('qux')

    assert_equal expected, actual
  end