title: How do I configure Eclipse to run your tests automatically?
body: <p>I read this article: Configure your IDE to run your tests automatically
  <a href="http://eclipse.dzone.com/videos/configure-your-ide-run-your" rel="noreferrer">http://eclipse.dzone.com/videos/configure-your-ide-run-your</a></p>
  
  <p>It's pretty easy to configure Eclipse IDE to run an Ant target every time a file is saved.
  MyProject -> Right-click : Properties -> Builders -> New -> Ant Builder</p>
  
  <p>The problem is that the builder has to rebuild the jar on every save, which is very long. The JUnit tests run using the .classes in the jar.</p>
  
  <p>We already have JUnit configurations (EclipseIde .launch files which contains the whole classpath to run the tests). I wish I could create a builder that wraps those JUnit launch files. This would have the benefit of running the tests against Eclipse .classes (faster than rebuilding the jar). Also the test results are displayed in the JUnit view.</p>
  
  <p>Has anybody manage to do that?</p>