There are a few good ways to find out just how much stress you and the people you care about can survive putting yourselves through. Really, if you want to know if you and your significant other are going to be a long-term deal, go shopping at Ikea together.
And, if you can actually navigate the store and agree on furniture without clawing at each other's throats, take things up a notch by assembling the furniture together.
Or, you can just break out the old Monopoly board.