What are some good example open source Ruby projects that use Cucumber and RSpec well?

What are some good example open source Ruby 开发者_如何转开发projects that use Cucumber and RSpec well?

Update: While the suggestions below where quite impressive, I wanted to see how others are using RSpec and Cucumber to drive product development.

From Quora:

Teng Siong Ong, Ruby, Python, etc.

https://github.com/teambox/teambox

I find it really nice that the RSpec project is tested with both Cucumber and RSpec itself:

• https://github.com/rspec/rspec-core/tree/master/features
• https://github.com/rspec/rspec-core/tree/master/spec

Cucumber is also self-hosted test-wise:

• https://github.com/aslakhellesoy/cucumber/tree/master/features

I've also found it very useful that Aruba, a library of steps for testing CLI apps with Cucumber, is itself tested with Cucumber:

• https://github.com/aslakhellesoy/aruba/tree/master/features

RubySpec is a rather ambitious effort to write specs for the Ruby language.