def test_isValidGregorian(self):
     date = Date(12, 1, 2000)
     self.assertEqual(date._isValidGregorian(333, 30, 2000), False)
     self.assertEqual(date._isValidGregorian(12, 1, 2000), True)
     self.assertEqual(date._isValidGregorian(2, 29, 2000 ), True)
     self.assertEqual(date._isValidGregorian(2, 30, 2000 ), False)