old_contents: import unittest
  
  from calexicon.calendars.tests.test_calendar import JulianGregorianConversion
  
  from calexicon.fn import julian_to_gregorian, gregorian_to_julian
  from calexicon.fn import julian_to_julian_day_number, julian_day_number_to_julian
  
  
  class TestJulianConversion(JulianGregorianConversion):
      def setUp(self):
          pass
  
      def Julian_to_Gregorian_conversion(self, julian_args, gregorian_args):
          result = julian_to_gregorian(*julian_args)
          self.assertEqual(
              result,
              gregorian_args,
          )
  
      def Gregorian_to_Julian_conversion(self, julian_args, gregorian_args):
          result = gregorian_to_julian(*gregorian_args)
          self.assertEqual(
              result,
              julian_args,
          )
  
  
  class TestJulianNumberConversion(unittest.TestCase):
      def test_number_to_julian_date(self):
          self.assertEqual(julian_to_julian_day_number(-4713, 1, 1), 0)
          self.assertEqual(julian_to_julian_day_number(-4712, 1, 1), 365)
  
      def test_julian_date_to_number(self):
          self.assertEqual(julian_day_number_to_julian(1), (-4713, 1, 1))
  
new_contents: import unittest
  
  from calexicon.calendars.tests.test_calendar import JulianGregorianConversion
  
  from calexicon.fn import julian_to_gregorian, gregorian_to_julian
  from calexicon.fn import julian_to_julian_day_number, julian_day_number_to_julian
  
  
  class TestJulianConversion(JulianGregorianConversion):
      def setUp(self):
          pass
  
      def Julian_to_Gregorian_conversion(self, julian_args, gregorian_args):
          result = julian_to_gregorian(*julian_args)
          self.assertEqual(
              result,
              gregorian_args,
          )
  
      def Gregorian_to_Julian_conversion(self, julian_args, gregorian_args):
          result = gregorian_to_julian(*gregorian_args)
          self.assertEqual(
              result,
              julian_args,
          )
  
  
  class TestJulianNumberConversion(unittest.TestCase):
      def test_number_to_julian_date(self):
          self.assertEqual(julian_to_julian_day_number(-4713, 1, 1), 0)
          self.assertEqual(julian_to_julian_day_number(-4712, 1, 1), 365)
  
      def test_julian_date_to_number(self):
          self.assertEqual(julian_day_number_to_julian(0), (-4713, 1, 1))
  
subject: Correct test to match the inverse test.