title: Setting up actions for multiple test folders in SBT
body: <p>In relation to a <a href="https://stackoverflow.com/q/6212540/599068">previous question</a>, I'd like to have multiple test folders for different types of test and be able to execute the tests contained in each folder with a separate <a href="http://en.wikipedia.org/wiki/Simple_Build_Tool" rel="nofollow noreferrer">SBT</a> action. </p>
  
  <p>For example, an action 'test-unit' would run only the tests contained under the folder <em>src/test/scala/unit</em>, and a 'test-functional' action would run only the tests under <em>src/test/scala/functional</em>. How would we write actions to do this?</p>