Puppet – Unit Testing with RSpec

http://puppetlabs.com/blog/the-next-generation-of-puppet-module-testing

http://puppetlabs.com/presentations/puppet-loves-rspec-why-you-should-too

http://puppetlabs.com/blog/verifying-puppet-checking-syntax-and-writing-automated-tests

http://puppetlabs.com/presentations/beaker-automated-cloud-based-acceptance-testing-alice-nodelman-puppet-labs

http://rspec-puppet.com/tutorial/

Beaker:

http://puppetlabs.com/search/node/beaker

http://puppetlabs.com/presentations/beaker-automated-cloud-based-acceptance-testing-alice-nodelman-puppet-labs

http://puppetlabs.com/podcasts/podcast-beaker-cloud-enabled-acceptance-testing-tool