--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/symbian-qemu-0.9.1-12/python-2.6.1/Lib/test/test_struct.py Fri Jul 31 15:01:17 2009 +0100
@@ -0,0 +1,579 @@
+import array
+import unittest
+import struct
+import warnings
+
+from functools import wraps
+from test.test_support import TestFailed, verbose, run_unittest
+
+import sys
+ISBIGENDIAN = sys.byteorder == "big"
+IS32BIT = sys.maxsize == 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 warnings.catch_warnings():
+ # 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()