In ShrinkWrap UrlAsset downloaded an asset from a URL, which can be external and then it creates the Archive element with that info. The problem is that sometimes you might want to download a big file (2MB) to put inside an Archive, and this means that for each test class that you execute you end up by downloading this file.

A possible solution could be create a CacheUrlAsset that downloads the content and stores it in

/shrinkwrap so in successive calls before downloading the file again, it can take it directly from cache directory.