def test_ensure_percent_reserve(self):
s = Size("8 GiB")
self.assertAlmostEqual(s.ensure_percent_reserve(20),
Size("10 GiB"),
delta=Size("1 MiB"))
for s in (Size("4 GiB"), Size("5 GiB"), Size("100 GiB")):
for percent in (10, 15, 20, 35, 80):
with_reserve = s.ensure_percent_reserve(percent)
self.assertAlmostEqual(with_reserve - s,
with_reserve * (percent / 100),
delta=Size("1 MiB"))
