I'd say both the person and the techniques have to be tested. Ideally in as many ways possible (for both the person and the techniques).
The thing is the techniques in themselves don't need to be tested, they work, what you are doing is testing whether you can do the techniques when you need to, physically the techniques are easy, doing them under duress with a calm mind rather than a panicking one not so easy. People are concentrating on techniques as if they've just been invented and they don't know they work, of course they do, you are testing your ability to use them not the actual techniques themselves.
A roundhouse kick to the head works, no one can dispute that so it's not the roundhouse kick you are testing it's your abilities to use it. people need to separate the technique from the ability to make the technique work, if you can't make it work it's not the techniques fault is it?