factory :media_file_for_image, class: MediaFile do

    before :create do
      unless File.exist?(Rails.root.join("db/media_files",Rails.env,'attachments/b/b8bf2eb322e04a29a52fbb06d4866af8'))
        System.execute_cmd! "tar xf #{Rails.root.join "spec/data/grumpy-cat_files.tar.gz"} -C #{Rails.root.join  "db/media_files/", Rails.env}"