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+This module has grown over time based on a range of contributions from
+people using it. If you follow these contributing guidelines your patch
+will likely make it into a release a little quicker.
+
+
+## Contributing
+
+1. Fork the repo.
+
+2. Run the tests. We only take pull requests with passing tests, and
+   it's great to know that you have a clean slate
+
+3. Add a test for your change. Only refactoring and documentation
+   changes require no new tests. If you are adding functionality
+   or fixing a bug, please add a test.
+
+4. Make the test pass.
+
+5. Push to your fork and submit a pull request.
+
+
+## Dependencies
+
+The testing and development tools have a bunch of dependencies,
+all managed by [bundler](http://bundler.io/) according to the
+[Puppet support matrix](http://docs.puppetlabs.com/guides/platforms.html#ruby-versions).
+
+By default the tests use a baseline version of Puppet.
+
+If you have Ruby 2.x or want a specific version of Puppet,
+you must set an environment variable such as:
+
+    export PUPPET_VERSION="~> 3.2.0"
+
+Install the dependencies like so...
+
+    bundle install
+
+## Syntax and style
+
+The test suite will run [Puppet Lint](http://puppet-lint.com/) and
+[Puppet Syntax](https://github.com/gds-operations/puppet-syntax) to
+check various syntax and style things. You can run these locally with:
+
+    bundle exec rake lint
+    bundle exec rake syntax
+
+## Running the unit tests
+
+The unit test suite covers most of the code, as mentioned above please
+add tests if you're adding new functionality. If you've not used
+[rspec-puppet](http://rspec-puppet.com/) before then feel free to ask
+about how best to test your new feature. Running the test suite is done
+with:
+
+    bundle exec rake spec
+
+Note also you can run the syntax, style and unit tests in one go with:
+
+    bundle exec rake test
+
+## Integration tests
+
+The unit tests just check the code runs, not that it does exactly what
+we want on a real machine. For that we're using
+[beaker](https://github.com/puppetlabs/beaker).
+
+This fires up a new virtual machine (using vagrant) and runs a series of
+simple tests against it after applying the module. You can run this
+with:
+
+    bundle exec rake acceptance
+
+This will run the tests on an Ubuntu 12.04 virtual machine. You can also
+run the integration tests against Centos 6.5 with.
+
+    RS_SET=centos-64-x64 bundle exec rake acceptances
+
+If you don't want to have to recreate the virtual machine every time you
+can use `BEAKER_DESTROY=no` and `BEAKER_PROVISION=no`. On the first run you will
+at least need `BEAKER_PROVISION` set to yes (the default). The Vagrantfile
+for the created virtual machines will be in `.vagrant/beaker_vagrant_fies`.
+