Alfonso, I'd question whether "picking a fight" is actually testing your aikido, win or lose, as I'd consider you've already failed by instigating the fight in the first place. Using your knowledge if attacked, different matter.
Bryan, hope to hell that's not the point of aikido, I'm rubbish at DIY. Thanks for the addition of the "how you deal with the aftermath" part, totally agree. I'd hate to train with someone who could feel nothing for someone they've injured.