This is generally bad advice in many states -- and can put his unemployment claim at risk (if he's a full-time employee, which is usually what most states require before allowing you to tap unemployment benefits).
Typically the states will have specific requirements about what constitutes a "no-fault" loss of employment. He should definitely look into what those are (and think carefully about whether what he intends to to meet those criteria) before simply resigning.
I had a friend who quit because his guaranteed bonus was not paid (he still received his salary), and the Unemployment insurance considered it a valid reason to quit. UI was paid even though the employer fought it.
My advice to the poster is that he simply check explicitly as to what the regulations say, before taking the plunge -- rather than simply guess, and hope for the best after the fact.
If he says he "can't" then quit, go to the unemployment office and tell them. I don't know if you can collect unemployment after working for such a short period, but they will investigate and you will eventually get paid.