In the Java space, JUnit is predominately used and in .NET I believe nUnit is very popular. Is a community agreed upon unit testing framework for the Ruby world?
Ba
You may want to look into the manager gem that I have developed. It not only is a test framework, but is does documentation as well at the same time.
You can stick to Test::Unit
or you can have nice extensions to it using Shoulda or some cool contexts using Context.
On the other side, if you prefer BDD then you can safely stick to RSpec.
As for for acceptance testing use Cucumber .
See also What’s the most commonly used unit testing framework for different types of Ruby applications? question.
The most popular one is RSpec, although both expectations and test/unit are quite well-known.