def test_olddates(self):
"""
Check that we can convert dates older than 1901
"""
self.assertEqual(dbf2date('18990506'), datetime.date(1899, 5, 6))
self.assertEqual(date2dbf(datetime.date(1899, 5, 6)), '18990506')
self.assertEqual(str2dbf('06.05.1899'), '18990506')
self.assertEqual(dbf2str('18990506'), '06.05.1899')
def test_dbf2str(self):
self.assertEqual(dbf2str(''), None)
self.assertEqual(dbf2str('None'), None)
self.assertEqual(dbf2str(None), None)
self.assertEqual(dbf2str('20060506'), '06.05.2006')
self.assertEqual(dbf2str('0'), None)
self.assertEqual(dbf2str('000'), None)
