Currently we cannot do any testing on the PS4, and we get that due to Sonys strict rules, most PS4 users would be able to accept.
There a significant issue with this though, and it gives PC users a definite advantage.
The ability to forge in testing allows new methods to be worked out and practiced without any loss of in game items.
If I wanted to practice and work out new methods I would have to burn so many mats, and it leaves me with either keeping the same method or relying on the kindness of other to post their methods.
I am pretty sure that if I could freely practice different methods with all the mats available to me, I could work out a more efficient method.
I am not saying PC users should have this taken away, but finding a way to include a practice forge into the PS4 version should be a matter of high priority.
The devs have stated that they aim for all platform parity, this creates a significant imbalance!