new_contents: __author__ = 'nino'
  
  import unittest
  from jadrolinija import Vozilo
  
  
  class VoziloTest(unittest.TestCase):
  
      def test_something(self):
          v = Vozilo('NM DK-34J', 425)
          self.assertEqual(v.tablica, 'NM DK-34J')
          self.assertEqual(v.dolzina, 425)
  
  
  if __name__ == '__main__':
      unittest.main()
  
subject: Add unittests for Task 4