mirror of
https://github.com/python/cpython.git
synced 2025-08-03 16:39:00 +00:00
8c66326368
Known issues: The string.Formatter class, as discussed in the PEP, is incomplete. Error handling needs to conform to the PEP. Need to fix this warning that I introduced in Python/formatter_unicode.c: Objects/stringlib/unicodedefs.h:26: warning: `STRINGLIB_CMP' defined but not used Need to make sure sign formatting is correct, more tests needed. Need to remove '()' sign formatting, left over from an earlier version of the PEP.
157 lines
6.1 KiB
Python
157 lines
6.1 KiB
Python
|
|
import unittest, struct
|
|
from test import test_support
|
|
|
|
class FormatFunctionsTestCase(unittest.TestCase):
|
|
|
|
def setUp(self):
|
|
self.save_formats = {'double':float.__getformat__('double'),
|
|
'float':float.__getformat__('float')}
|
|
|
|
def tearDown(self):
|
|
float.__setformat__('double', self.save_formats['double'])
|
|
float.__setformat__('float', self.save_formats['float'])
|
|
|
|
def test_getformat(self):
|
|
self.assert_(float.__getformat__('double') in
|
|
['unknown', 'IEEE, big-endian', 'IEEE, little-endian'])
|
|
self.assert_(float.__getformat__('float') in
|
|
['unknown', 'IEEE, big-endian', 'IEEE, little-endian'])
|
|
self.assertRaises(ValueError, float.__getformat__, 'chicken')
|
|
self.assertRaises(TypeError, float.__getformat__, 1)
|
|
|
|
def test_setformat(self):
|
|
for t in 'double', 'float':
|
|
float.__setformat__(t, 'unknown')
|
|
if self.save_formats[t] == 'IEEE, big-endian':
|
|
self.assertRaises(ValueError, float.__setformat__,
|
|
t, 'IEEE, little-endian')
|
|
elif self.save_formats[t] == 'IEEE, little-endian':
|
|
self.assertRaises(ValueError, float.__setformat__,
|
|
t, 'IEEE, big-endian')
|
|
else:
|
|
self.assertRaises(ValueError, float.__setformat__,
|
|
t, 'IEEE, big-endian')
|
|
self.assertRaises(ValueError, float.__setformat__,
|
|
t, 'IEEE, little-endian')
|
|
self.assertRaises(ValueError, float.__setformat__,
|
|
t, 'chicken')
|
|
self.assertRaises(ValueError, float.__setformat__,
|
|
'chicken', 'unknown')
|
|
|
|
BE_DOUBLE_INF = b'\x7f\xf0\x00\x00\x00\x00\x00\x00'
|
|
LE_DOUBLE_INF = bytes(reversed(BE_DOUBLE_INF))
|
|
BE_DOUBLE_NAN = b'\x7f\xf8\x00\x00\x00\x00\x00\x00'
|
|
LE_DOUBLE_NAN = bytes(reversed(BE_DOUBLE_NAN))
|
|
|
|
BE_FLOAT_INF = b'\x7f\x80\x00\x00'
|
|
LE_FLOAT_INF = bytes(reversed(BE_FLOAT_INF))
|
|
BE_FLOAT_NAN = b'\x7f\xc0\x00\x00'
|
|
LE_FLOAT_NAN = bytes(reversed(BE_FLOAT_NAN))
|
|
|
|
# on non-IEEE platforms, attempting to unpack a bit pattern
|
|
# representing an infinity or a NaN should raise an exception.
|
|
|
|
class UnknownFormatTestCase(unittest.TestCase):
|
|
def setUp(self):
|
|
self.save_formats = {'double':float.__getformat__('double'),
|
|
'float':float.__getformat__('float')}
|
|
float.__setformat__('double', 'unknown')
|
|
float.__setformat__('float', 'unknown')
|
|
|
|
def tearDown(self):
|
|
float.__setformat__('double', self.save_formats['double'])
|
|
float.__setformat__('float', self.save_formats['float'])
|
|
|
|
def test_double_specials_dont_unpack(self):
|
|
for fmt, data in [('>d', BE_DOUBLE_INF),
|
|
('>d', BE_DOUBLE_NAN),
|
|
('<d', LE_DOUBLE_INF),
|
|
('<d', LE_DOUBLE_NAN)]:
|
|
self.assertRaises(ValueError, struct.unpack, fmt, data)
|
|
|
|
def test_float_specials_dont_unpack(self):
|
|
for fmt, data in [('>f', BE_FLOAT_INF),
|
|
('>f', BE_FLOAT_NAN),
|
|
('<f', LE_FLOAT_INF),
|
|
('<f', LE_FLOAT_NAN)]:
|
|
self.assertRaises(ValueError, struct.unpack, fmt, data)
|
|
|
|
|
|
# on an IEEE platform, all we guarantee is that bit patterns
|
|
# representing infinities or NaNs do not raise an exception; all else
|
|
# is accident (today).
|
|
# let's also try to guarantee that -0.0 and 0.0 don't get confused.
|
|
|
|
class IEEEFormatTestCase(unittest.TestCase):
|
|
if float.__getformat__("double").startswith("IEEE"):
|
|
def test_double_specials_do_unpack(self):
|
|
for fmt, data in [('>d', BE_DOUBLE_INF),
|
|
('>d', BE_DOUBLE_NAN),
|
|
('<d', LE_DOUBLE_INF),
|
|
('<d', LE_DOUBLE_NAN)]:
|
|
struct.unpack(fmt, data)
|
|
|
|
if float.__getformat__("float").startswith("IEEE"):
|
|
def test_float_specials_do_unpack(self):
|
|
for fmt, data in [('>f', BE_FLOAT_INF),
|
|
('>f', BE_FLOAT_NAN),
|
|
('<f', LE_FLOAT_INF),
|
|
('<f', LE_FLOAT_NAN)]:
|
|
struct.unpack(fmt, data)
|
|
|
|
if float.__getformat__("double").startswith("IEEE"):
|
|
def test_negative_zero(self):
|
|
import math
|
|
def pos_pos():
|
|
return 0.0, math.atan2(0.0, -1)
|
|
def pos_neg():
|
|
return 0.0, math.atan2(-0.0, -1)
|
|
def neg_pos():
|
|
return -0.0, math.atan2(0.0, -1)
|
|
def neg_neg():
|
|
return -0.0, math.atan2(-0.0, -1)
|
|
self.assertEquals(pos_pos(), neg_pos())
|
|
self.assertEquals(pos_neg(), neg_neg())
|
|
|
|
class FormatTestCase(unittest.TestCase):
|
|
def testFormat(self):
|
|
# these should be rewritten to use both format(x, spec) and
|
|
# x.__format__(spec)
|
|
|
|
self.assertEqual(format(0.0, 'f'), '0.000000')
|
|
|
|
# the default is 'g', except for empty format spec
|
|
self.assertEqual(format(0.0, ''), '0.0')
|
|
self.assertEqual(format(0.01, ''), '0.01')
|
|
self.assertEqual(format(0.01, 'g'), '0.01')
|
|
|
|
self.assertEqual(format(0, 'f'), '0.000000')
|
|
|
|
self.assertEqual(format(1.0, 'f'), '1.000000')
|
|
self.assertEqual(format(1, 'f'), '1.000000')
|
|
|
|
self.assertEqual(format(-1.0, 'f'), '-1.000000')
|
|
self.assertEqual(format(-1, 'f'), '-1.000000')
|
|
|
|
self.assertEqual(format( 1.0, ' f'), ' 1.000000')
|
|
self.assertEqual(format(-1.0, ' f'), '-1.000000')
|
|
self.assertEqual(format( 1.0, '+f'), '+1.000000')
|
|
self.assertEqual(format(-1.0, '+f'), '-1.000000')
|
|
|
|
# % formatting
|
|
self.assertEqual(format(-1.0, '%'), '-100.000000%')
|
|
|
|
# conversion to string should fail
|
|
self.assertRaises(ValueError, format, 3.0, "s")
|
|
|
|
|
|
def test_main():
|
|
test_support.run_unittest(
|
|
FormatFunctionsTestCase,
|
|
UnknownFormatTestCase,
|
|
IEEEFormatTestCase,
|
|
FormatTestCase)
|
|
|
|
if __name__ == '__main__':
|
|
test_main()
|