def test_from_timestamp(self):
t = DateTime.from_timestamp(0)
self.assertEqual(t.year, 1970)
self.assertEqual(t.month, 1)
self.assertEqual(t.day, 1)
self.assertEqual(t.hour, 0)
self.assertEqual(t.minute, 0)
self.assertEqual(t.second, 0.0)
self.assertIsNone(t.tzinfo)
def test_from_timestamp_with_tz(self):
t = DateTime.from_timestamp(0, eastern)
self.assertEqual(t.year, 1969)
self.assertEqual(t.month, 12)
self.assertEqual(t.day, 31)
self.assertEqual(t.hour, 19)
self.assertEqual(t.minute, 0)
self.assertEqual(t.second, 0.0)
self.assertEqual(t.utcoffset(), timedelta(seconds=-18000))
self.assertEqual(t.dst(), timedelta())
self.assertEqual(t.tzname(), "EST")
def test_from_overflowing_timestamp(self):
with self.assertRaises(ValueError):
_ = DateTime.from_timestamp(999999999999999999)
