I haven't done an online test, but when we did such exercises at school, I managed to do sort of well, though not easily. To do such things, I always need to make gestures, imagine a lot, speak to myself out loud, etc.
I guess being okay but having trouble makes me average.
Though still about spatial stuff, I SUCK at orientation. Back when I still drove, I sometimes got lost in my hometown which I have seldom left. And a few months ago, I got lost WALKING just a few Km. With a map.