How to tell if a newly built bicycle wheel is safe to ride?
You said that it is laterally and radially true, dished correctly and properly tensioned. Sounds like its ready to ride! As far as i know there is no real true test method other than riding. I would just take an easy ride around the block or on a tame trail. You may find that after riding for a bit you will need to re-tension some of the spokes after they have settled in. This is pretty normal with use.