When you can successfully execute the techniques against actively resisting and countering attacker, it means you are ready for the test.
I can understand why you'd say that to a degree ..but its not what I'd expect from a lower kyu grade.
I'd expect them to be able to demonstrate what they'd been taught in lessons.
I'd also expect Uke to give the requested attack unless some form of jiyuwaza or randori were taking place.
Maybe its just me...but my view has always been that if uke is free to vary the attack then naturally tori is free to deploy any response.
All in the spirit of harmony of course.