diff -r 000000000000 -r ae805ac0140d python-2.5.2/win32/Lib/test/test_struct.py --- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/python-2.5.2/win32/Lib/test/test_struct.py Fri Apr 03 17:19:34 2009 +0100 @@ -0,0 +1,625 @@ +from test.test_support import TestFailed, verbose, verify, vereq +import test.test_support +import struct +import array +import warnings + +import sys +ISBIGENDIAN = sys.byteorder == "big" +del sys +verify((struct.pack('=i', 1)[0] == chr(0)) == ISBIGENDIAN, + "bigendian determination appears wrong") + +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 simple_err(func, *args): + try: + func(*args) + except struct.error: + pass + else: + raise TestFailed, "%s%s did not raise struct.error" % ( + func.__name__, args) + +def any_err(func, *args): + try: + func(*args) + except (struct.error, TypeError): + pass + else: + raise TestFailed, "%s%s did not raise error" % ( + func.__name__, args) + +def with_warning_restore(func): + def _with_warning_restore(*args, **kw): + # The `warnings` module doesn't have an advertised way to restore + # its filter list. Cheat. + save_warnings_filters = warnings.filters[:] + # Grrr, we need this function to warn every time. Without removing + # the warningregistry, running test_tarfile then test_struct would fail + # on 64-bit platforms. + globals = func.func_globals + if '__warningregistry__' in globals: + del globals['__warningregistry__'] + warnings.filterwarnings("error", r"""^struct.*""", DeprecationWarning) + warnings.filterwarnings("error", r""".*format requires.*""", + DeprecationWarning) + try: + return func(*args, **kw) + finally: + warnings.filters[:] = save_warnings_filters[:] + return _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 struct.error" % ( + func.__name__, args) + else: + raise TestFailed, "%s%s did not raise error" % ( + func.__name__, args) +deprecated_err = with_warning_restore(deprecated_err) + + +simple_err(struct.calcsize, 'Z') + +sz = struct.calcsize('i') +if sz * 3 != struct.calcsize('iii'): + raise TestFailed, 'inconsistent sizes' + +fmt = 'cbxxxxxxhhhhiillffd' +fmt3 = '3c3b18x12h6i6l6f3d' +sz = struct.calcsize(fmt) +sz3 = struct.calcsize(fmt3) +if sz * 3 != sz3: + raise TestFailed, 'inconsistent sizes (3*%r -> 3*%d = %d, %r -> %d)' % ( + fmt, sz, 3*sz, fmt3, sz3) + +simple_err(struct.pack, 'iii', 3) +simple_err(struct.pack, 'i', 3, 3, 3) +simple_err(struct.pack, 'i', 'foo') +simple_err(struct.pack, 'P', 'foo') +simple_err(struct.unpack, 'd', 'flap') +s = struct.pack('ii', 1, 2) +simple_err(struct.unpack, 'iii', s) +simple_err(struct.unpack, 'i', s) + +c = 'a' +b = 1 +h = 255 +i = 65535 +l = 65536 +f = 3.1415 +d = 3.1415 + +for prefix in ('', '@', '<', '>', '=', '!'): + for format in ('xcbhilfd', 'xcBHILfd'): + format = prefix + format + if verbose: + print "trying:", format + s = struct.pack(format, c, b, h, i, l, f, d) + cp, bp, hp, ip, lp, fp, dp = struct.unpack(format, s) + if (cp != c or bp != b or hp != h or ip != i or lp != l or + int(100 * fp) != int(100 * f) or int(100 * dp) != int(100 * d)): + # ^^^ calculate only to two decimal places + raise TestFailed, "unpack/pack not transitive (%s, %s)" % ( + str(format), str((cp, bp, hp, ip, lp, fp, dp))) + +# 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), +] + +for fmt, arg, big, lil, asy in tests: + if verbose: + print "%r %r %r %r" % (fmt, arg, big, lil) + for (xfmt, exp) in [('>'+fmt, big), ('!'+fmt, big), ('<'+fmt, lil), + ('='+fmt, ISBIGENDIAN and big or lil)]: + res = struct.pack(xfmt, arg) + if res != exp: + raise TestFailed, "pack(%r, %r) -> %r # expected %r" % ( + fmt, arg, res, exp) + n = struct.calcsize(xfmt) + if n != len(res): + raise TestFailed, "calcsize(%r) -> %d # expected %d" % ( + xfmt, n, len(res)) + rev = struct.unpack(xfmt, res)[0] + if rev != arg and not asy: + raise TestFailed, "unpack(%r, %r) -> (%r,) # expected (%r,)" % ( + fmt, res, rev, arg) + +########################################################################### +# Simple native q/Q tests. + +has_native_qQ = 1 +try: + struct.pack("q", 5) +except struct.error: + has_native_qQ = 0 + +if verbose: + print "Platform has native q/Q?", has_native_qQ and "Yes." or "No." + +any_err(struct.pack, "Q", -1) # can't pack -1 as unsigned regardless +simple_err(struct.pack, "q", "a") # can't pack string as 'q' regardless +simple_err(struct.pack, "Q", "a") # ditto, but 'Q' + +def test_native_qQ(): + 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) + verify(got == native_expected, + "%r-pack of %r gave %r, not %r" % + (format, input, got, native_expected)) + retrieved = struct.unpack(format, got)[0] + verify(retrieved == input, + "%r-unpack of %r gave %r, not %r" % + (format, got, retrieved, input)) + +if has_native_qQ: + test_native_qQ() + +########################################################################### +# Standard integer tests (bBhHiIlLqQ). + +import binascii + +class IntTester: + + # 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): + assert len(formatpair) == 2 + self.formatpair = formatpair + for direction in "<>!=": + for code in formatpair: + format = direction + code + verify(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): + if verbose: + print "trying std", self.formatpair, "on", x, "==", hex(x) + + # 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 + 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) + verify(got == expected, + "'%s'-pack of %r gave %r, not %r" % + (format, x, got, expected)) + + # Unpack work? + retrieved = unpack(format, got)[0] + verify(x == retrieved, + "'%s'-unpack of %r gave %r, not %r" % + (format, got, retrieved, x)) + + # Adding any byte should cause a "too big" error. + any_err(unpack, format, '\x01' + got) + + # Try little-endian. + format = "<" + code + expected = string_reverse(expected) + + # Pack work? + got = pack(format, x) + verify(got == expected, + "'%s'-pack of %r gave %r, not %r" % + (format, x, got, expected)) + + # Unpack work? + retrieved = unpack(format, got)[0] + verify(x == retrieved, + "'%s'-unpack of %r gave %r, not %r" % + (format, got, retrieved, x)) + + # Adding any byte should cause a "too big" error. + any_err(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) + verify(got == expected, + "'%s'-pack of %r gave %r, not %r" % + (format, x, got, expected)) + + # Unpack work? + retrieved = unpack(format, got)[0] + verify(x == retrieved, + "'%s'-unpack of %r gave %r, not %r" % + (format, got, retrieved, x)) + + # Adding any byte should cause a "too big" error. + any_err(unpack, format, '\x01' + got) + + # Try little-endian. + format = "<" + code + expected = string_reverse(expected) + + # Pack work? + got = pack(format, x) + verify(got == expected, + "'%s'-pack of %r gave %r, not %r" % + (format, x, got, expected)) + + # Unpack work? + retrieved = unpack(format, got)[0] + verify(x == retrieved, + "'%s'-unpack of %r gave %r, not %r" % + (format, got, retrieved, x)) + + # Adding any byte should cause a "too big" error. + any_err(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: + any_err(struct.pack, direction + code, badobject) + +for args in [("bB", 1), + ("hH", 2), + ("iI", 4), + ("lL", 4), + ("qQ", 8)]: + t = IntTester(*args) + t.run() + + +########################################################################### +# The p ("Pascal string") code. + +def test_p_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) + if got != expected: + raise TestFailed("pack(%r, %r) == %r but expected %r" % + (code, input, got, expected)) + (got,) = struct.unpack(code, got) + if got != expectedback: + raise TestFailed("unpack(%r, %r) == %r but expected %r" % + (code, input, got, expectedback)) + +test_p_code() + + +########################################################################### +# SF bug 705836. "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. + +def test_705836(): + 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) + verify(bigpacked == string_reverse(packed), + ">f pack should be byte-reversal of f", bigpacked)[0] + verify(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] + verify(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) + try: + packed = struct.pack(">f", big) + except OverflowError: + pass + else: + TestFailed("expected OverflowError") + +test_705836() + +########################################################################### +# SF bug 1229380. No struct.pack exception for some out of range integers + +def test_1229380(): + 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) + +if PY_STRUCT_RANGE_CHECKING: + test_1229380() + +########################################################################### +# SF bug 1530559. struct.pack raises TypeError where it used to convert. + +def check_float_coerce(format, number): + if PY_STRUCT_FLOAT_COERCE == 2: + # Test for pre-2.5 struct module + packed = struct.pack(format, number) + floored = struct.unpack(format, packed)[0] + if floored != int(number): + raise TestFailed("did not correcly coerce float to int") + return + try: + func(*args) + except (struct.error, TypeError): + if PY_STRUCT_FLOAT_COERCE: + raise TestFailed("expected DeprecationWarning for float coerce") + except DeprecationWarning: + if not PY_STRUCT_FLOAT_COERCE: + raise TestFailed("expected to raise struct.error for float coerce") + else: + raise TestFailed("did not raise error for float coerce") + +check_float_coerce = with_warning_restore(deprecated_err) + +def test_1530559(): + for endian in ('', '>', '<'): + for fmt in ('B', 'H', 'I', 'L', 'b', 'h', 'i', 'l'): + check_float_coerce(endian + fmt, 1.0) + check_float_coerce(endian + fmt, 1.5) + +test_1530559() + +########################################################################### +# Packing and unpacking to/from buffers. + +# Copied and modified from unittest. +def assertRaises(excClass, callableObj, *args, **kwargs): + try: + callableObj(*args, **kwargs) + except excClass: + return + else: + raise TestFailed("%s not raised." % excClass) + +def test_unpack_from(): + test_string = 'abcd01234' + fmt = '4s' + s = struct.Struct(fmt) + for cls in (str, buffer): + data = cls(test_string) + vereq(s.unpack_from(data), ('abcd',)) + vereq(s.unpack_from(data, 2), ('cd01',)) + vereq(s.unpack_from(data, 4), ('0123',)) + for i in xrange(6): + vereq(s.unpack_from(data, i), (data[i:i+4],)) + for i in xrange(6, len(test_string) + 1): + simple_err(s.unpack_from, data, i) + for cls in (str, buffer): + data = cls(test_string) + vereq(struct.unpack_from(fmt, data), ('abcd',)) + vereq(struct.unpack_from(fmt, data, 2), ('cd01',)) + vereq(struct.unpack_from(fmt, data, 4), ('0123',)) + for i in xrange(6): + vereq(struct.unpack_from(fmt, data, i), (data[i:i+4],)) + for i in xrange(6, len(test_string) + 1): + simple_err(struct.unpack_from, fmt, data, i) + +def test_pack_into(): + 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)] + vereq(from_buf, test_string) + + # Test with offset. + s.pack_into(writable_buf, 10, test_string) + from_buf = writable_buf.tostring()[:len(test_string)+10] + vereq(from_buf, test_string[:10] + test_string) + + # Go beyond boundaries. + small_buf = array.array('c', ' '*10) + assertRaises(struct.error, s.pack_into, small_buf, 0, test_string) + assertRaises(struct.error, s.pack_into, small_buf, 2, test_string) + +def test_pack_into_fn(): + 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)] + vereq(from_buf, test_string) + + # Test with offset. + pack_into(writable_buf, 10, test_string) + from_buf = writable_buf.tostring()[:len(test_string)+10] + vereq(from_buf, test_string[:10] + test_string) + + # Go beyond boundaries. + small_buf = array.array('c', ' '*10) + assertRaises(struct.error, pack_into, small_buf, 0, test_string) + assertRaises(struct.error, pack_into, small_buf, 2, test_string) + +def test_unpack_with_buffer(): + # SF bug 1563759: struct.unpack doens't support buffer protocol objects + data = array.array('B', '\x12\x34\x56\x78') + value, = struct.unpack('>I', data) + vereq(value, 0x12345678) + +# Test methods to pack and unpack from buffers rather than strings. +test_unpack_from() +test_pack_into() +test_pack_into_fn() +test_unpack_with_buffer()