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from test_support import TestFailed, verbose
import struct
## import pdb
def simple_err(func, *args):
try:
apply(func, args)
except struct.error:
pass
else:
raise TestFailed, "%s%s did not raise struct.error" % (
func.__name__, args)
## pdb.set_trace()
simple_err(struct.calcsize, 'Q')
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*%s -> 3*%d = %d, %s -> %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.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),
]
def badpack(fmt, arg, got, exp):
return
def badunpack(fmt, arg, got, exp):
return "unpack(%s, %s) -> (%s,) # expected (%s,)" % (
`fmt`, `arg`, `got`, `exp`)
isbigendian = struct.pack('=h', 1) == '\0\1'
for fmt, arg, big, lil, asy in tests:
if verbose:
print `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(%s, %s) -> %s # expected %s" % (
`fmt`, `arg`, `res`, `exp`)
n = struct.calcsize(xfmt)
if n != len(res):
raise TestFailed, "calcsize(%s) -> %d # expected %d" % (
`xfmt`, n, len(res))
rev = struct.unpack(xfmt, res)[0]
if rev != arg and not asy:
raise TestFailed, "unpack(%s, %s) -> (%s,) # expected (%s,)" % (
`fmt`, `res`, `rev`, `arg`)
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