I used Test::Unit for a long time, but I found it to be a poor tool when doing integration tests. RSpec lets me do both within the same DSL quite easily. That's probably why a lot of people flock to RSpec. I still have old Test::Unit code sitting in my RSpec suite that I haven't moved over to RSpec's DSL.
That being said, to a developer writing tests and doing TDD, Cucumber is a speed bump that doesn't need to be there. RSpec is great without lumping more crap on top of it.
That being said, to a developer writing tests and doing TDD, Cucumber is a speed bump that doesn't need to be there. RSpec is great without lumping more crap on top of it.