def test_best_prefix_identical_result(self):
"""NIST: instance.best_prefix returns the same type if nothing changes
Start with a NIST unit that is already prefectly sized, and apply
best_prefix() to it."""
# This is our perfectly sized unit. No change was required
should_be_EiB = bitmath.EiB(1).best_prefix()
self.assertIs(type(should_be_EiB), bitmath.EiB)
# Let's be thorough and do that one more time
self.assertIs(type(should_be_EiB.best_prefix()), bitmath.EiB)
def setUp(self):
self.bit = bitmath.Bit(1)
self.byte = bitmath.Byte(1)
# NIST units
self.kib = bitmath.KiB(1)
self.mib = bitmath.MiB(1)
self.gib = bitmath.GiB(1)
self.tib = bitmath.TiB(1)
self.pib = bitmath.PiB(1)
self.eib = bitmath.EiB(1)
# SI units
self.kb = bitmath.kB(1)
self.mb = bitmath.MB(1)
self.gb = bitmath.GB(1)
self.tb = bitmath.TB(1)
self.pb = bitmath.PB(1)
self.eb = bitmath.EB(1)
def size_to_bytes(human_size):
PARSE_REGEXP = r"(\d+)([MGTPE]i)"
parse = re.compile(PARSE_REGEXP)
try:
size, unit = re.match(parse, human_size).group(1, 2)
size = int(size)
assert size > 0
if unit == 'Mi':
return int(bitmath.MiB(size).to_Byte())
elif unit == 'Gi':
return int(bitmath.GiB(size).to_Byte())
elif unit == 'Ti':
return int(bitmath.TiB(size).to_Byte())
elif unit == 'Pi':
return int(bitmath.PiB(size).to_Byte())
elif unit == 'Ei':
return int(bitmath.EiB(size).to_Byte())
else:
return 0
except Exception as e:
return 0
def test_extreme_oom_round_up(self):
"""NIST: 2048 EiB (as a KiB()) rounds up into an EiB()"""
huge_KiB = bitmath.KiB.from_other(bitmath.EiB(1))
self.assertIs(type(huge_KiB.best_prefix()), bitmath.EiB)
def test_parse_Eio(self):
"""parse_string works on exbioctet strings"""
self.assertEqual(
bitmath.parse_string("654 Eio"),
bitmath.EiB(654))