allow registering multiple function-style tests in one compilation unit
allow registering multiple function-style tests in one compilation unit

Co-Authored-By: Hannes Rantzsch <c1190df9b3e23bbda5d5c600e898565346e3a1ec@nexenio.com>

randombit/botan,randombit/botan,randombit/botan,randombit/botan,randombit/botan