My best advice is to try it both ways (assuming you are interested in Test First/TDD). You'll find a sweet spot that works well for you. This is an area where

My best advice is to try it both ways (assuming you are interested in Test First/TDD). You'll find a sweet spot that works well for you. This is an area where I think there are lots of things that can work well. For me, my TDD is probably the sharpest knife in my kit, so I rely on it. For others, maybe there are other things. Don't let anyone tell you that there is only one way to do it. Of course you have to find a way to collaborate effectively (and that's the real difficult part), but in terms of growing as a developer I think you've got a lot of viable paths.