mirror of
https://github.com/python/cpython.git
synced 2025-11-04 07:31:38 +00:00
579 lines
23 KiB
Python
579 lines
23 KiB
Python
import array
|
|
import unittest
|
|
import struct
|
|
import warnings
|
|
|
|
from functools import wraps
|
|
from test.test_support import TestFailed, verbose, run_unittest, catch_warning
|
|
|
|
import sys
|
|
ISBIGENDIAN = sys.byteorder == "big"
|
|
IS32BIT = sys.maxint == 0x7fffffff
|
|
del sys
|
|
|
|
try:
|
|
import _struct
|
|
except ImportError:
|
|
PY_STRUCT_RANGE_CHECKING = 0
|
|
PY_STRUCT_OVERFLOW_MASKING = 1
|
|
PY_STRUCT_FLOAT_COERCE = 2
|
|
else:
|
|
PY_STRUCT_RANGE_CHECKING = getattr(_struct, '_PY_STRUCT_RANGE_CHECKING', 0)
|
|
PY_STRUCT_OVERFLOW_MASKING = getattr(_struct, '_PY_STRUCT_OVERFLOW_MASKING', 0)
|
|
PY_STRUCT_FLOAT_COERCE = getattr(_struct, '_PY_STRUCT_FLOAT_COERCE', 0)
|
|
|
|
def string_reverse(s):
|
|
return "".join(reversed(s))
|
|
|
|
def bigendian_to_native(value):
|
|
if ISBIGENDIAN:
|
|
return value
|
|
else:
|
|
return string_reverse(value)
|
|
|
|
def with_warning_restore(func):
|
|
@wraps(func)
|
|
def decorator(*args, **kw):
|
|
with catch_warning():
|
|
# We need this function to warn every time, so stick an
|
|
# unqualifed 'always' at the head of the filter list
|
|
warnings.simplefilter("always")
|
|
warnings.filterwarnings("error", category=DeprecationWarning)
|
|
return func(*args, **kw)
|
|
return decorator
|
|
|
|
@with_warning_restore
|
|
def deprecated_err(func, *args):
|
|
try:
|
|
func(*args)
|
|
except (struct.error, TypeError):
|
|
pass
|
|
except DeprecationWarning:
|
|
if not PY_STRUCT_OVERFLOW_MASKING:
|
|
raise TestFailed, "%s%s expected to raise DeprecationWarning" % (
|
|
func.__name__, args)
|
|
else:
|
|
raise TestFailed, "%s%s did not raise error" % (
|
|
func.__name__, args)
|
|
|
|
|
|
class StructTest(unittest.TestCase):
|
|
|
|
@with_warning_restore
|
|
def check_float_coerce(self, format, number):
|
|
# SF bug 1530559. struct.pack raises TypeError where it used to convert.
|
|
if PY_STRUCT_FLOAT_COERCE == 2:
|
|
# Test for pre-2.5 struct module
|
|
packed = struct.pack(format, number)
|
|
floored = struct.unpack(format, packed)[0]
|
|
self.assertEqual(floored, int(number),
|
|
"did not correcly coerce float to int")
|
|
return
|
|
try:
|
|
struct.pack(format, number)
|
|
except (struct.error, TypeError):
|
|
if PY_STRUCT_FLOAT_COERCE:
|
|
self.fail("expected DeprecationWarning for float coerce")
|
|
except DeprecationWarning:
|
|
if not PY_STRUCT_FLOAT_COERCE:
|
|
self.fail("expected to raise struct.error for float coerce")
|
|
else:
|
|
self.fail("did not raise error for float coerce")
|
|
|
|
def test_isbigendian(self):
|
|
self.assertEqual((struct.pack('=i', 1)[0] == chr(0)), ISBIGENDIAN)
|
|
|
|
def test_consistence(self):
|
|
self.assertRaises(struct.error, struct.calcsize, 'Z')
|
|
|
|
sz = struct.calcsize('i')
|
|
self.assertEqual(sz * 3, struct.calcsize('iii'))
|
|
|
|
fmt = 'cbxxxxxxhhhhiillffd?'
|
|
fmt3 = '3c3b18x12h6i6l6f3d3?'
|
|
sz = struct.calcsize(fmt)
|
|
sz3 = struct.calcsize(fmt3)
|
|
self.assertEqual(sz * 3, sz3)
|
|
|
|
self.assertRaises(struct.error, struct.pack, 'iii', 3)
|
|
self.assertRaises(struct.error, struct.pack, 'i', 3, 3, 3)
|
|
self.assertRaises(struct.error, struct.pack, 'i', 'foo')
|
|
self.assertRaises(struct.error, struct.pack, 'P', 'foo')
|
|
self.assertRaises(struct.error, struct.unpack, 'd', 'flap')
|
|
s = struct.pack('ii', 1, 2)
|
|
self.assertRaises(struct.error, struct.unpack, 'iii', s)
|
|
self.assertRaises(struct.error, struct.unpack, 'i', s)
|
|
|
|
def test_transitiveness(self):
|
|
c = 'a'
|
|
b = 1
|
|
h = 255
|
|
i = 65535
|
|
l = 65536
|
|
f = 3.1415
|
|
d = 3.1415
|
|
t = True
|
|
|
|
for prefix in ('', '@', '<', '>', '=', '!'):
|
|
for format in ('xcbhilfd?', 'xcBHILfd?'):
|
|
format = prefix + format
|
|
s = struct.pack(format, c, b, h, i, l, f, d, t)
|
|
cp, bp, hp, ip, lp, fp, dp, tp = struct.unpack(format, s)
|
|
self.assertEqual(cp, c)
|
|
self.assertEqual(bp, b)
|
|
self.assertEqual(hp, h)
|
|
self.assertEqual(ip, i)
|
|
self.assertEqual(lp, l)
|
|
self.assertEqual(int(100 * fp), int(100 * f))
|
|
self.assertEqual(int(100 * dp), int(100 * d))
|
|
self.assertEqual(tp, t)
|
|
|
|
def test_new_features(self):
|
|
# Test some of the new features in detail
|
|
# (format, argument, big-endian result, little-endian result, asymmetric)
|
|
tests = [
|
|
('c', 'a', 'a', 'a', 0),
|
|
('xc', 'a', '\0a', '\0a', 0),
|
|
('cx', 'a', 'a\0', 'a\0', 0),
|
|
('s', 'a', 'a', 'a', 0),
|
|
('0s', 'helloworld', '', '', 1),
|
|
('1s', 'helloworld', 'h', 'h', 1),
|
|
('9s', 'helloworld', 'helloworl', 'helloworl', 1),
|
|
('10s', 'helloworld', 'helloworld', 'helloworld', 0),
|
|
('11s', 'helloworld', 'helloworld\0', 'helloworld\0', 1),
|
|
('20s', 'helloworld', 'helloworld'+10*'\0', 'helloworld'+10*'\0', 1),
|
|
('b', 7, '\7', '\7', 0),
|
|
('b', -7, '\371', '\371', 0),
|
|
('B', 7, '\7', '\7', 0),
|
|
('B', 249, '\371', '\371', 0),
|
|
('h', 700, '\002\274', '\274\002', 0),
|
|
('h', -700, '\375D', 'D\375', 0),
|
|
('H', 700, '\002\274', '\274\002', 0),
|
|
('H', 0x10000-700, '\375D', 'D\375', 0),
|
|
('i', 70000000, '\004,\035\200', '\200\035,\004', 0),
|
|
('i', -70000000, '\373\323\342\200', '\200\342\323\373', 0),
|
|
('I', 70000000L, '\004,\035\200', '\200\035,\004', 0),
|
|
('I', 0x100000000L-70000000, '\373\323\342\200', '\200\342\323\373', 0),
|
|
('l', 70000000, '\004,\035\200', '\200\035,\004', 0),
|
|
('l', -70000000, '\373\323\342\200', '\200\342\323\373', 0),
|
|
('L', 70000000L, '\004,\035\200', '\200\035,\004', 0),
|
|
('L', 0x100000000L-70000000, '\373\323\342\200', '\200\342\323\373', 0),
|
|
('f', 2.0, '@\000\000\000', '\000\000\000@', 0),
|
|
('d', 2.0, '@\000\000\000\000\000\000\000',
|
|
'\000\000\000\000\000\000\000@', 0),
|
|
('f', -2.0, '\300\000\000\000', '\000\000\000\300', 0),
|
|
('d', -2.0, '\300\000\000\000\000\000\000\000',
|
|
'\000\000\000\000\000\000\000\300', 0),
|
|
('?', 0, '\0', '\0', 0),
|
|
('?', 3, '\1', '\1', 1),
|
|
('?', True, '\1', '\1', 0),
|
|
('?', [], '\0', '\0', 1),
|
|
('?', (1,), '\1', '\1', 1),
|
|
]
|
|
|
|
for fmt, arg, big, lil, asy in tests:
|
|
for (xfmt, exp) in [('>'+fmt, big), ('!'+fmt, big), ('<'+fmt, lil),
|
|
('='+fmt, ISBIGENDIAN and big or lil)]:
|
|
res = struct.pack(xfmt, arg)
|
|
self.assertEqual(res, exp)
|
|
self.assertEqual(struct.calcsize(xfmt), len(res))
|
|
rev = struct.unpack(xfmt, res)[0]
|
|
if rev != arg:
|
|
self.assert_(asy)
|
|
|
|
def test_native_qQ(self):
|
|
# can't pack -1 as unsigned regardless
|
|
self.assertRaises((struct.error, TypeError), struct.pack, "Q", -1)
|
|
# can't pack string as 'q' regardless
|
|
self.assertRaises(struct.error, struct.pack, "q", "a")
|
|
# ditto, but 'Q'
|
|
self.assertRaises(struct.error, struct.pack, "Q", "a")
|
|
|
|
try:
|
|
struct.pack("q", 5)
|
|
except struct.error:
|
|
# does not have native q/Q
|
|
pass
|
|
else:
|
|
bytes = struct.calcsize('q')
|
|
# The expected values here are in big-endian format, primarily
|
|
# because I'm on a little-endian machine and so this is the
|
|
# clearest way (for me) to force the code to get exercised.
|
|
for format, input, expected in (
|
|
('q', -1, '\xff' * bytes),
|
|
('q', 0, '\x00' * bytes),
|
|
('Q', 0, '\x00' * bytes),
|
|
('q', 1L, '\x00' * (bytes-1) + '\x01'),
|
|
('Q', (1L << (8*bytes))-1, '\xff' * bytes),
|
|
('q', (1L << (8*bytes-1))-1, '\x7f' + '\xff' * (bytes - 1))):
|
|
got = struct.pack(format, input)
|
|
native_expected = bigendian_to_native(expected)
|
|
self.assertEqual(got, native_expected)
|
|
retrieved = struct.unpack(format, got)[0]
|
|
self.assertEqual(retrieved, input)
|
|
|
|
def test_standard_integers(self):
|
|
# Standard integer tests (bBhHiIlLqQ).
|
|
import binascii
|
|
|
|
class IntTester(unittest.TestCase):
|
|
|
|
# XXX Most std integer modes fail to test for out-of-range.
|
|
# The "i" and "l" codes appear to range-check OK on 32-bit boxes, but
|
|
# fail to check correctly on some 64-bit ones (Tru64 Unix + Compaq C
|
|
# reported by Mark Favas).
|
|
BUGGY_RANGE_CHECK = "bBhHiIlL"
|
|
|
|
def __init__(self, formatpair, bytesize):
|
|
self.assertEqual(len(formatpair), 2)
|
|
self.formatpair = formatpair
|
|
for direction in "<>!=":
|
|
for code in formatpair:
|
|
format = direction + code
|
|
self.assertEqual(struct.calcsize(format), bytesize)
|
|
self.bytesize = bytesize
|
|
self.bitsize = bytesize * 8
|
|
self.signed_code, self.unsigned_code = formatpair
|
|
self.unsigned_min = 0
|
|
self.unsigned_max = 2L**self.bitsize - 1
|
|
self.signed_min = -(2L**(self.bitsize-1))
|
|
self.signed_max = 2L**(self.bitsize-1) - 1
|
|
|
|
def test_one(self, x, pack=struct.pack,
|
|
unpack=struct.unpack,
|
|
unhexlify=binascii.unhexlify):
|
|
# Try signed.
|
|
code = self.signed_code
|
|
if self.signed_min <= x <= self.signed_max:
|
|
# Try big-endian.
|
|
expected = long(x)
|
|
if x < 0:
|
|
expected += 1L << self.bitsize
|
|
self.assert_(expected > 0)
|
|
expected = hex(expected)[2:-1] # chop "0x" and trailing 'L'
|
|
if len(expected) & 1:
|
|
expected = "0" + expected
|
|
expected = unhexlify(expected)
|
|
expected = "\x00" * (self.bytesize - len(expected)) + expected
|
|
|
|
# Pack work?
|
|
format = ">" + code
|
|
got = pack(format, x)
|
|
self.assertEqual(got, expected)
|
|
|
|
# Unpack work?
|
|
retrieved = unpack(format, got)[0]
|
|
self.assertEqual(x, retrieved)
|
|
|
|
# Adding any byte should cause a "too big" error.
|
|
self.assertRaises((struct.error, TypeError), unpack, format,
|
|
'\x01' + got)
|
|
# Try little-endian.
|
|
format = "<" + code
|
|
expected = string_reverse(expected)
|
|
|
|
# Pack work?
|
|
got = pack(format, x)
|
|
self.assertEqual(got, expected)
|
|
|
|
# Unpack work?
|
|
retrieved = unpack(format, got)[0]
|
|
self.assertEqual(x, retrieved)
|
|
|
|
# Adding any byte should cause a "too big" error.
|
|
self.assertRaises((struct.error, TypeError), unpack, format,
|
|
'\x01' + got)
|
|
|
|
else:
|
|
# x is out of range -- verify pack realizes that.
|
|
if not PY_STRUCT_RANGE_CHECKING and code in self.BUGGY_RANGE_CHECK:
|
|
if verbose:
|
|
print "Skipping buggy range check for code", code
|
|
else:
|
|
deprecated_err(pack, ">" + code, x)
|
|
deprecated_err(pack, "<" + code, x)
|
|
|
|
# Much the same for unsigned.
|
|
code = self.unsigned_code
|
|
if self.unsigned_min <= x <= self.unsigned_max:
|
|
# Try big-endian.
|
|
format = ">" + code
|
|
expected = long(x)
|
|
expected = hex(expected)[2:-1] # chop "0x" and trailing 'L'
|
|
if len(expected) & 1:
|
|
expected = "0" + expected
|
|
expected = unhexlify(expected)
|
|
expected = "\x00" * (self.bytesize - len(expected)) + expected
|
|
|
|
# Pack work?
|
|
got = pack(format, x)
|
|
self.assertEqual(got, expected)
|
|
|
|
# Unpack work?
|
|
retrieved = unpack(format, got)[0]
|
|
self.assertEqual(x, retrieved)
|
|
|
|
# Adding any byte should cause a "too big" error.
|
|
self.assertRaises((struct.error, TypeError), unpack, format,
|
|
'\x01' + got)
|
|
|
|
# Try little-endian.
|
|
format = "<" + code
|
|
expected = string_reverse(expected)
|
|
|
|
# Pack work?
|
|
got = pack(format, x)
|
|
self.assertEqual(got, expected)
|
|
|
|
# Unpack work?
|
|
retrieved = unpack(format, got)[0]
|
|
self.assertEqual(x, retrieved)
|
|
|
|
# Adding any byte should cause a "too big" error.
|
|
self.assertRaises((struct.error, TypeError), unpack, format,
|
|
'\x01' + got)
|
|
|
|
else:
|
|
# x is out of range -- verify pack realizes that.
|
|
if not PY_STRUCT_RANGE_CHECKING and code in self.BUGGY_RANGE_CHECK:
|
|
if verbose:
|
|
print "Skipping buggy range check for code", code
|
|
else:
|
|
deprecated_err(pack, ">" + code, x)
|
|
deprecated_err(pack, "<" + code, x)
|
|
|
|
def run(self):
|
|
from random import randrange
|
|
|
|
# Create all interesting powers of 2.
|
|
values = []
|
|
for exp in range(self.bitsize + 3):
|
|
values.append(1L << exp)
|
|
|
|
# Add some random values.
|
|
for i in range(self.bitsize):
|
|
val = 0L
|
|
for j in range(self.bytesize):
|
|
val = (val << 8) | randrange(256)
|
|
values.append(val)
|
|
|
|
# Try all those, and their negations, and +-1 from them. Note
|
|
# that this tests all power-of-2 boundaries in range, and a few out
|
|
# of range, plus +-(2**n +- 1).
|
|
for base in values:
|
|
for val in -base, base:
|
|
for incr in -1, 0, 1:
|
|
x = val + incr
|
|
try:
|
|
x = int(x)
|
|
except OverflowError:
|
|
pass
|
|
self.test_one(x)
|
|
|
|
# Some error cases.
|
|
for direction in "<>":
|
|
for code in self.formatpair:
|
|
for badobject in "a string", 3+42j, randrange:
|
|
self.assertRaises((struct.error, TypeError),
|
|
struct.pack, direction + code,
|
|
badobject)
|
|
|
|
for args in [("bB", 1),
|
|
("hH", 2),
|
|
("iI", 4),
|
|
("lL", 4),
|
|
("qQ", 8)]:
|
|
t = IntTester(*args)
|
|
t.run()
|
|
|
|
def test_p_code(self):
|
|
# Test p ("Pascal string") code.
|
|
for code, input, expected, expectedback in [
|
|
('p','abc', '\x00', ''),
|
|
('1p', 'abc', '\x00', ''),
|
|
('2p', 'abc', '\x01a', 'a'),
|
|
('3p', 'abc', '\x02ab', 'ab'),
|
|
('4p', 'abc', '\x03abc', 'abc'),
|
|
('5p', 'abc', '\x03abc\x00', 'abc'),
|
|
('6p', 'abc', '\x03abc\x00\x00', 'abc'),
|
|
('1000p', 'x'*1000, '\xff' + 'x'*999, 'x'*255)]:
|
|
got = struct.pack(code, input)
|
|
self.assertEqual(got, expected)
|
|
(got,) = struct.unpack(code, got)
|
|
self.assertEqual(got, expectedback)
|
|
|
|
def test_705836(self):
|
|
# SF bug 705836. "<f" and ">f" had a severe rounding bug, where a carry
|
|
# from the low-order discarded bits could propagate into the exponent
|
|
# field, causing the result to be wrong by a factor of 2.
|
|
import math
|
|
|
|
for base in range(1, 33):
|
|
# smaller <- largest representable float less than base.
|
|
delta = 0.5
|
|
while base - delta / 2.0 != base:
|
|
delta /= 2.0
|
|
smaller = base - delta
|
|
# Packing this rounds away a solid string of trailing 1 bits.
|
|
packed = struct.pack("<f", smaller)
|
|
unpacked = struct.unpack("<f", packed)[0]
|
|
# This failed at base = 2, 4, and 32, with unpacked = 1, 2, and
|
|
# 16, respectively.
|
|
self.assertEqual(base, unpacked)
|
|
bigpacked = struct.pack(">f", smaller)
|
|
self.assertEqual(bigpacked, string_reverse(packed))
|
|
unpacked = struct.unpack(">f", bigpacked)[0]
|
|
self.assertEqual(base, unpacked)
|
|
|
|
# Largest finite IEEE single.
|
|
big = (1 << 24) - 1
|
|
big = math.ldexp(big, 127 - 23)
|
|
packed = struct.pack(">f", big)
|
|
unpacked = struct.unpack(">f", packed)[0]
|
|
self.assertEqual(big, unpacked)
|
|
|
|
# The same, but tack on a 1 bit so it rounds up to infinity.
|
|
big = (1 << 25) - 1
|
|
big = math.ldexp(big, 127 - 24)
|
|
self.assertRaises(OverflowError, struct.pack, ">f", big)
|
|
|
|
if PY_STRUCT_RANGE_CHECKING:
|
|
def test_1229380(self):
|
|
# SF bug 1229380. No struct.pack exception for some out of
|
|
# range integers
|
|
import sys
|
|
for endian in ('', '>', '<'):
|
|
for cls in (int, long):
|
|
for fmt in ('B', 'H', 'I', 'L'):
|
|
deprecated_err(struct.pack, endian + fmt, cls(-1))
|
|
|
|
deprecated_err(struct.pack, endian + 'B', cls(300))
|
|
deprecated_err(struct.pack, endian + 'H', cls(70000))
|
|
|
|
deprecated_err(struct.pack, endian + 'I', sys.maxint * 4L)
|
|
deprecated_err(struct.pack, endian + 'L', sys.maxint * 4L)
|
|
|
|
def XXXtest_1530559(self):
|
|
# XXX This is broken: see the bug report
|
|
# SF bug 1530559. struct.pack raises TypeError where it used to convert.
|
|
for endian in ('', '>', '<'):
|
|
for fmt in ('B', 'H', 'I', 'L', 'b', 'h', 'i', 'l'):
|
|
self.check_float_coerce(endian + fmt, 1.0)
|
|
self.check_float_coerce(endian + fmt, 1.5)
|
|
|
|
def test_unpack_from(self):
|
|
test_string = 'abcd01234'
|
|
fmt = '4s'
|
|
s = struct.Struct(fmt)
|
|
for cls in (str, buffer):
|
|
data = cls(test_string)
|
|
self.assertEqual(s.unpack_from(data), ('abcd',))
|
|
self.assertEqual(s.unpack_from(data, 2), ('cd01',))
|
|
self.assertEqual(s.unpack_from(data, 4), ('0123',))
|
|
for i in xrange(6):
|
|
self.assertEqual(s.unpack_from(data, i), (data[i:i+4],))
|
|
for i in xrange(6, len(test_string) + 1):
|
|
self.assertRaises(struct.error, s.unpack_from, data, i)
|
|
for cls in (str, buffer):
|
|
data = cls(test_string)
|
|
self.assertEqual(struct.unpack_from(fmt, data), ('abcd',))
|
|
self.assertEqual(struct.unpack_from(fmt, data, 2), ('cd01',))
|
|
self.assertEqual(struct.unpack_from(fmt, data, 4), ('0123',))
|
|
for i in xrange(6):
|
|
self.assertEqual(struct.unpack_from(fmt, data, i), (data[i:i+4],))
|
|
for i in xrange(6, len(test_string) + 1):
|
|
self.assertRaises(struct.error, struct.unpack_from, fmt, data, i)
|
|
|
|
def test_pack_into(self):
|
|
test_string = 'Reykjavik rocks, eow!'
|
|
writable_buf = array.array('c', ' '*100)
|
|
fmt = '21s'
|
|
s = struct.Struct(fmt)
|
|
|
|
# Test without offset
|
|
s.pack_into(writable_buf, 0, test_string)
|
|
from_buf = writable_buf.tostring()[:len(test_string)]
|
|
self.assertEqual(from_buf, test_string)
|
|
|
|
# Test with offset.
|
|
s.pack_into(writable_buf, 10, test_string)
|
|
from_buf = writable_buf.tostring()[:len(test_string)+10]
|
|
self.assertEqual(from_buf, test_string[:10] + test_string)
|
|
|
|
# Go beyond boundaries.
|
|
small_buf = array.array('c', ' '*10)
|
|
self.assertRaises(struct.error, s.pack_into, small_buf, 0, test_string)
|
|
self.assertRaises(struct.error, s.pack_into, small_buf, 2, test_string)
|
|
|
|
def test_pack_into_fn(self):
|
|
test_string = 'Reykjavik rocks, eow!'
|
|
writable_buf = array.array('c', ' '*100)
|
|
fmt = '21s'
|
|
pack_into = lambda *args: struct.pack_into(fmt, *args)
|
|
|
|
# Test without offset.
|
|
pack_into(writable_buf, 0, test_string)
|
|
from_buf = writable_buf.tostring()[:len(test_string)]
|
|
self.assertEqual(from_buf, test_string)
|
|
|
|
# Test with offset.
|
|
pack_into(writable_buf, 10, test_string)
|
|
from_buf = writable_buf.tostring()[:len(test_string)+10]
|
|
self.assertEqual(from_buf, test_string[:10] + test_string)
|
|
|
|
# Go beyond boundaries.
|
|
small_buf = array.array('c', ' '*10)
|
|
self.assertRaises(struct.error, pack_into, small_buf, 0, test_string)
|
|
self.assertRaises(struct.error, pack_into, small_buf, 2, test_string)
|
|
|
|
def test_unpack_with_buffer(self):
|
|
# SF bug 1563759: struct.unpack doens't support buffer protocol objects
|
|
data1 = array.array('B', '\x12\x34\x56\x78')
|
|
data2 = buffer('......\x12\x34\x56\x78......', 6, 4)
|
|
for data in [data1, data2]:
|
|
value, = struct.unpack('>I', data)
|
|
self.assertEqual(value, 0x12345678)
|
|
|
|
def test_bool(self):
|
|
for prefix in tuple("<>!=")+('',):
|
|
false = (), [], [], '', 0
|
|
true = [1], 'test', 5, -1, 0xffffffffL+1, 0xffffffff/2
|
|
|
|
falseFormat = prefix + '?' * len(false)
|
|
packedFalse = struct.pack(falseFormat, *false)
|
|
unpackedFalse = struct.unpack(falseFormat, packedFalse)
|
|
|
|
trueFormat = prefix + '?' * len(true)
|
|
packedTrue = struct.pack(trueFormat, *true)
|
|
unpackedTrue = struct.unpack(trueFormat, packedTrue)
|
|
|
|
self.assertEqual(len(true), len(unpackedTrue))
|
|
self.assertEqual(len(false), len(unpackedFalse))
|
|
|
|
for t in unpackedFalse:
|
|
self.assertFalse(t)
|
|
for t in unpackedTrue:
|
|
self.assertTrue(t)
|
|
|
|
packed = struct.pack(prefix+'?', 1)
|
|
|
|
self.assertEqual(len(packed), struct.calcsize(prefix+'?'))
|
|
|
|
if len(packed) != 1:
|
|
self.assertFalse(prefix, msg='encoded bool is not one byte: %r'
|
|
%packed)
|
|
|
|
for c in '\x01\x7f\xff\x0f\xf0':
|
|
self.assertTrue(struct.unpack('>?', c)[0])
|
|
|
|
if IS32BIT:
|
|
def test_crasher(self):
|
|
self.assertRaises(MemoryError, struct.pack, "357913941c", "a")
|
|
|
|
|
|
|
|
def test_main():
|
|
run_unittest(StructTest)
|
|
|
|
if __name__ == '__main__':
|
|
test_main()
|