def testSettingConfiguration(self):
""" Test that setting configuration to different values has effect. """
s = Size(64, GiB)
s.set_str_config(StrConfig(strip=False))
prev = str(s)
s.set_str_config(StrConfig(strip=True))
subs = str(s)
self.assertTrue(subs != prev)
def testStrWithSmallDeviations(self):
""" Behavior when deviation from whole value is small. """
Size.set_str_config(StrConfig(strip=True))
eps = Decimal(1024)/100/2 # 1/2 of 1% of 1024
# deviation is less than 1/2 of 1% of 1024
s = Size(16384 - (eps - 1))
self.assertEqual(str(s), "16 KiB")
# deviation is greater than 1/2 of 1% of 1024
s = Size(16384 - (eps + 1))
self.assertEqual(str(s), "15.99 KiB")
# deviation is greater than 1/2 of 1% of 1024
s = Size(16384 + (eps + 1))
self.assertEqual(str(s), "16.01 KiB")
# deviation is less than 1/2 of 1% of 1024
s = Size(16384 + (eps - 1))
self.assertEqual(str(s), "16 KiB")
def testStrConfigs(self):
""" Test str with various configuration options. """
Size.set_str_config(StrConfig(strip=True))
# exactly 4 Pi
s = Size(0x10000000000000)
self.assertEqual(str(s), "4 PiB")
s = Size(300, MiB)
self.assertEqual(str(s), "300 MiB")
s = Size('12.6998', TiB)
self.assertEqual(str(s), "12.7 TiB")
# byte values close to multiples of 2 are shown without trailing zeros
s = Size(0xff)
self.assertEqual(str(s), "255 B")
# a fractional quantity is shown if the value deviates
# from the whole number of units by more than 1%
s = Size(16384 - (Decimal(1024)/100 + 1))
self.assertEqual(str(s), "15.99 KiB")
# test a very large quantity with no associated abbreviation or prefix
s = Size(1024**9)
self.assertEqual(str(s), "1024 YiB")
s = Size(1024**9 - 1)
self.assertEqual(str(s), "1024 YiB")
s = Size(1024**10)
self.assertEqual(str(s), "1048576 YiB")
s = Size(0xfffffffffffff)
self.assertEqual(str(s), "4 PiB")
s = Size(0xffff)
# value is not exactly 64 KiB, but w/ 2 places, value is 64.00 KiB
# so the trailing 0s are stripped.
self.assertEqual(str(s), "64 KiB")
Size.set_str_config(StrConfig(max_places=3, strip=True))
s = Size('23.7874', TiB)
self.assertEqual(str(s), "23.787 TiB")
Size.set_str_config(StrConfig(min_value=10, strip=True))
s = Size(8193)
self.assertEqual(str(s), ("8193 B"))
# if max_places is set to None, all digits are displayed
Size.set_str_config(StrConfig(max_places=None, strip=True))
s = Size(0xfffffffffffff)
self.assertEqual(str(s), "3.9999999999999991118215803 PiB")
s = Size(0x10000)
self.assertEqual(str(s), ("64 KiB"))
s = Size(0x10001)
self.assertEqual(str(s), "64.0009765625 KiB")
Size.set_str_config(StrConfig(strip=False))
s = Size(1024**9 + 1)
self.assertEqual(str(s), "1024.00 YiB")
s = Size(0xfffff)
self.assertEqual(str(s), "1024.00 KiB")
def tearDown(self):
""" Reset configuration to default. """
Size.set_str_config(Defaults.STR_CONFIG)
