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#! /usr/bin/env python2.2
__doc__ = """test case for samba.tdbkpack functions
tdbpack provides a means of pickling values into binary formats
compatible with that used by the samba tdbpack()/tdbunpack()
functions.
Numbers are always stored in little-endian format; strings are stored
in either DOS or Unix codepage as appropriate.
The format for any particular element is encoded as a short ASCII
string, with one character per field."""
# Copyright (C) 2002 Hewlett-Packard.
__author__ = 'Martin Pool <mbp@sourcefrog.net>'
import unittest
import oldtdbutil
import samba.tdbpack
both_unpackers = (samba.tdbpack.unpack, oldtdbutil.unpack)
both_packers = (samba.tdbpack.pack, oldtdbutil.pack)
class PackTests(unittest.TestCase):
symm_cases = [('B', ['hello' * 51], '\xff\0\0\0' + 'hello' * 51),
('w', [42], '\x2a\0'),
('www', [42, 2, 69], '\x2a\0\x02\0\x45\0'),
('wd', [42, 256], '\x2a\0\0\x01\0\0'),
('w', [0], '\0\0'),
('w', [255], '\xff\0'),
('w', [256], '\0\x01'),
('w', [0xdead], '\xad\xde'),
('w', [0xffff], '\xff\xff'),
('p', [0], '\0\0\0\0'),
('p', [1], '\x01\0\0\0'),
('d', [0x01020304], '\x04\x03\x02\x01'),
('d', [0x7fffffff], '\xff\xff\xff\x7f'),
('d', [0x80000000], '\x00\x00\x00\x80'),
('d', [-1], '\xff\xff\xff\xff'),
('d', [-255], '\x01\xff\xff\xff'),
('d', [-256], '\x00\xff\xff\xff'),
('ddd', [1, 10, 50], '\x01\0\0\0\x0a\0\0\0\x32\0\0\0'),
('ff', ['hello', 'world'], 'hello\0world\0'),
('fP', ['hello', 'world'], 'hello\0world\0'),
('PP', ['hello', 'world'], 'hello\0world\0'),
('B', [''], '\0\0\0\0'),
('B', ['hello'], '\x05\0\0\0hello'),
('BB', ['hello\0world', 'now'],
'\x0b\0\0\0hello\0world\x03\0\0\0now'),
('pd', [1, 10], '\x01\0\0\0\x0a\0\0\0'),
('BBB', ['hello', '', 'world'],
'\x05\0\0\0hello\0\0\0\0\x05\0\0\0world'),
# strings are sequences in Python, there's no getting away
# from it
('ffff', 'evil', 'e\0v\0i\0l\0'),
('BBBB', 'evil',
'\x01\0\0\0e'
'\x01\0\0\0v'
'\x01\0\0\0i'
'\x01\0\0\0l'),
('', [], ''),
# exercise some long strings
('PP', ['hello' * 255, 'world' * 255],
'hello' * 255 + '\0' + 'world' * 255 + '\0'),
('PP', ['hello' * 40000, 'world' * 50000],
'hello' * 40000 + '\0' + 'world' * 50000 + '\0'),
('B', ['hello' * 51], '\xff\0\0\0' + 'hello' * 51),
('BB', ['hello' * 40000, 'world' * 50000],
'\x40\x0d\x03\0' + 'hello' * 40000 + '\x90\xd0\x03\x00' + 'world' * 50000),
]
def test_symmetric(self):
"""Cookbook of symmetric pack/unpack tests
"""
for packer in both_packers:
for unpacker in both_unpackers:
for format, values, expected in self.symm_cases:
self.assertEquals(packer(format, values), expected)
out, rest = unpacker(format, expected)
self.assertEquals(rest, '')
self.assertEquals(list(values), list(out))
def test_pack(self):
"""Cookbook of expected pack values
These can't be used for the symmetric test because the unpacked value is
not "canonical".
"""
cases = [('w', (42,), '\x2a\0'),
('p', [None], '\0\0\0\0'),
('p', ['true'], '\x01\0\0\0'),
]
for packer in both_packers:
for format, values, expected in cases:
self.assertEquals(packer(format, values), expected)
def test_unpack_extra(self):
# Test leftover data
for unpacker in both_unpackers:
for format, values, packed in self.symm_cases:
out, rest = unpacker(format, packed + 'hello sailor!')
self.assertEquals(rest, 'hello sailor!')
self.assertEquals(list(values), list(out))
def test_unpack(self):
"""Cookbook of tricky unpack tests"""
cases = [
# Apparently I couldn't think of any tests that weren't
# symmetric :-/
]
for unpacker in both_unpackers:
for format, values, expected in cases:
out, rest = unpacker(format, expected)
self.assertEquals(rest, '')
self.assertEquals(list(values), list(out))
def test_pack_failures(self):
"""Expected errors for incorrect packing"""
cases = [('w', []),
('w', ()),
('w', {}),
('ww', [2]),
('w', 2),
('', [1, 2, 3]),
('w', None),
('wwwwwwwwwwww', []),
('w', [2, 3]),
('w', [0x60A15EC5L]),
('w', [None]),
('w', xrange(10000)),
('d', []),
('d', [0L]),
('p', []),
('f', [2]),
('P', [None]),
('P', ()),
('f', [hex]),
('fw', ['hello']),
('f', [u'hello']),
('B', [2]),
(None, [2, 3, 4]),
(ord('f'), [20]),
(['w', 'w'], [2, 2]),
('Q', [2]),
('fQ', ['2', 3]),
('fQ', ['2']),
(2, [2]),
({}, {})]
for packer in both_packers:
for format, values in cases:
try:
packer(format, values)
except StandardError:
pass
else:
raise AssertionError("didn't get exception: format %s, values %s, packer %s"
% (`format`, `values`, `packer`))
def test_unpack_failures(self):
"""Expected errors for incorrect unpacking"""
cases = [('$', '', ValueError),
('Q', '', ValueError),
('Q$', '', ValueError),
('f', '', IndexError),
('d', '', IndexError),
('d', '2', IndexError),
('d', '22', IndexError),
('d', '222', IndexError),
('w', '', IndexError),
('w', '2', IndexError),
('f', 'hello', IndexError),
('f', '', IndexError),
('p', '\x01\0', IndexError),
('B', '\xff\0\0\0hello', IndexError),
('B', '\xff\0', IndexError),
('B', '\x01\0\0\0', IndexError),
('B', '\x05\0\0\0hell', IndexError),
('B', '\xff\xff\xff\xff', ValueError),
('B', 'foobar', IndexError),
('BB', '\x01\0\0\0a\x01', IndexError),
]
for unpacker in both_unpackers:
for format, values, throwable_class in cases:
def do_unpack():
unpacker(format, values)
self.assertRaises(throwable_class, do_unpack)
if __name__ == '__main__':
unittest.main()
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