title: Unit Test not running
body: <p>I'm getting stuck with some unittests.</p>
  
  <p>Here's the simplest example I could come up with:</p>
  
  <pre><code>#testito.py
  import unittest
  
  class Prueba(unittest.TestCase):
  
      def setUp(self):
          pass
      def printsTrue(self):
          self.assertTrue(True)
  
  if __name__=="__main__":
      unittest.main()
  </code></pre>
  
  <p>Problem is, running this has no effect:</p>
  
  <pre><code>$ python testito.py 
  
  ----------------------------------------------------------------------
  Ran 0 tests in 0.000s
  
  OK
  </code></pre>
  
  <p>I'm scratching my head as I don't see any problem with the code above.
  It happened with a couple of tests now and I don't really know what to do next.
  Any idea?</p>