I've not tested my sobriety - I've never been sober before. But I have tested my nicotine recovery - many times. I have now got it through my thick head that if I have just 1 cigarette I will be back chain-smoking within a month.
I am just as sure that if I have just 1 drink, I will be back pouring wine down my neck every evening within a month.
The thought of testing that, scares me.. a lot.