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

Question

What are some good example open source Ruby 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.

Answer 1

From Quora:

Teng Siong Ong, Ruby, Python, etc.

https://github.com/teambox/teambox

Answer 2

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