[kscaldef]

Okay, but it's not really all that clear that "sum.should == 3" is actually any more readable than "assert(sum == 3)". (Do you really have non-programmers reading code over your shoulder? I can't think of any case in a 10+ year career where that's happened.)

[kemiller]

I don't personally use the stuff. :) But I have seen environments where that does happen, and it works pretty well for them.

If you're not doing that, I think they're kind of silly.