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_tag_parser.rb
    path of file: ./repos/jekyll_picture_tag/test/unit/parsers
    
    the code of the file until where you have to start completion: require 'test_helper'
class TagParserTest < Minitest::Test
  include PictureTag
  include TestHelper

  def setup
  
    
  def test_aspect
    params = 'img.jpg entropy 3:2 mobile: img.jpg 4:3 center'
    correct = {
      nil => '3:2',
      'mobile' => '4:3'
    }

    assert_equal correct, tested(params).crop
  end