old_contents: import unittest
  
  from calexicon.internal.julian import distant_julian_to_gregorian
  
  
  class TestJulian(unittest.TestCase):
      def test_distant_julian_to_gregorian(self):
          self.assertEqual(distant_julian_to_gregorian(9999, 12, 1), (10000, 2, 12))
  
new_contents: import unittest
  
  from calexicon.internal.julian import distant_julian_to_gregorian, julian_to_gregorian
  
  
  class TestJulian(unittest.TestCase):
      def test_distant_julian_to_gregorian(self):
          self.assertEqual(distant_julian_to_gregorian(9999, 12, 1), (10000, 2, 12))
  
      def test_julian_to_gregorian(self):
          self.assertEqual(julian_to_gregorian(1984, 2, 29), (1984, 3, 13))
  
subject: Add a test for julian_to_gregorian.