title: How to get the list of all test?
body: <p>In <code>sbt</code> when I type <code>testOnly</code> and after press the <code>tab</code> key, then I will get all available tests: </p>
  
  <pre><code>sbt:plugger&gt; testOnly 
  --                                       com.sweetsoft.detector.DetectorSpec      com.sweetsoft.sender.SenderMessageSpec  
  </code></pre>
  
  <p>Is there a command to get all available test, instead press the <code>tab</code> key?</p>