Adding instructions on how to run test

README.md

@@ -6,5 +6,33 @@ You can [sign up](http://simperium.com) for a hosted version of Simperium. There
 
 This is not yet a full Simperium library for parsing diffs and changes. It's a wrapper for our [HTTP API](https://simperium.com/docs/http/) intended for scripting and basic backend development.
 
+Testing
+-------
+
+Before running tests you will need to hunt down and install some prerequisites:
+
+- [Bundler](http://gembundler.com) (should be as easy as `gem install bundler`)
+- [MongoDB](http://www.mongodb.org)
+
+### First Run 
+
+To run the tests, clone the repository and `bundle install` to install all of
+the dependencies.
+
+```bash
+$> git clone https://github.com/simperium/simperium-ruby
+$> bundle install
+```
+
+Go to simperium.com and register a new app. Set your shell's environment
+variables `SIMPERIUM_CLIENT_TEST_APPNAME` and `SIMPERIUM_CLIENT_TEST_APIKEY` to
+your new app's "App ID" and "API Key" respectively.
+
+Thereafter running tests should only require:
+
+```bash
+$> bundle exec rake test
+```
+
 ### License
 The Simperium Ruby library is available for free and commercial use under the MIT license.