def testRoundToNearest(self):
size = Size("1.5 KiB")
conv = size.round_to_nearest(Size("1 KiB"), rounding=ROUND_UP)
self.assertEqual(conv, Size("2 KiB"))
conv = size.round_to_nearest(KiB, rounding=ROUND_DOWN)
self.assertEqual(conv, Size("1 KiB"))
with self.assertRaises(ValueError):
size.round_to_nearest(-1, rounding=ROUND_UP)
