Update to the Scriptable Web Test Plugin
I've updated my web test scriptable parameters plugin to fix a bug with scripted context parameters and extracted tests and add the ability to to script the file name property of any file upload params.
For more information see:
https://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=3006040&SiteID=1
Many thanks to Lewis for his hard work in developing a repro and to Duat Le for spotting the casting crime I was committing.
Hope this is useful.
Neil Kidd.