samba-mirror/source/python/examples/tdbpack/test_tdbpack.py

#! /usr/bin/env python2.2

__doc__ = """test case for samba.tdbpack 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)



# #             ('B', [10, 'hello'], '\x0a\0\0\0hello'),
#              ('BB', [11, 'hello\0world', 3, 'now'],
#               '\x0b\0\0\0hello\0world\x03\0\0\0now'),
#              ('pd', [1, 10], '\x01\0\0\0\x0a\0\0\0'),
#              ('BBB', [5, 'hello', 0, '', 5, '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', [(5*51), 'hello' * 51], '\xff\0\0\0' + 'hello' * 51),
#              ('BB', [(5 * 40000), 'hello' * 40000,
#                      (5 * 50000), 'world' * 50000],
#               '\x40\x0d\x03\0' + 'hello' * 40000 + '\x90\xd0\x03\x00' + 'world' * 50000),

    
class PackTests(unittest.TestCase):
    symm_cases = [
             ('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', [0x80000000L], '\x00\x00\x00\x80'),
             ('d', [0x80000069L], '\x69\x00\x00\x80'),
             ('d', [0xffffffffL], '\xff\xff\xff\xff'),
             ('d', [0xffffff00L], '\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\0'),
# old implementation is wierd when string is not the right length             
#             ('B', [2, 'hello'], '\x0a\0\0\0hello'),
             ('B', [5, 'hello'], '\x05\0\0\0hello'),
             ]

    def test_symmetric(self):
        """Cookbook of symmetric pack/unpack tests
        """
        for packer in [samba.tdbpack.pack]: # both_packers:
            for unpacker in both_unpackers:
                for format, values, expected in self.symm_cases:
                    out_packed = packer(format, values)
                    self.assertEquals(out_packed, expected)
                    out, rest = unpacker(format, expected)
                    self.assertEquals(rest, '')
                    self.assertEquals(list(values), list(out))

    def test_large(self):
        """Test large pack/unpack strings"""
        large_cases = [('w' * 1000, xrange(1000)), ]
        for packer in both_packers:
            for unpacker in both_unpackers:
                for format, values in large_cases:
                    packed = packer(format, values)
                    out, rest = unpacker(format, packed)
                    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'),
                 ]

        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_pack_extra(self):
        """Leftover values when packing"""
        cases = [
            ('d', [10, 20], [10]),
            ('d', [10, 'hello'], [10]),
            ('ff', ['hello', 'world', 'sailor'], ['hello', 'world']),
            ]
        for unpacker in both_unpackers:
            for packer in both_packers:
                for format, values, chopped in cases:
                    bin = packer(format, values)
                    out, rest = unpacker(format, bin)
                    self.assertEquals(list(out), list(chopped))
                    self.assertEquals(rest, '')


    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),
#                  ('w', None),
                 ('wwwwwwwwwwww', []),
#                 ('w', [0x60A15EC5L]),
#                 ('w', [None]),
                 ('d', []),
                 ('p', []),
                 ('f', [2]),
                 ('P', [None]),
                 ('P', ()),
                 ('f', [hex]),
                 ('fw', ['hello']),
#                  ('f', [u'hello']),
                 ('B', [2]),
                 (None, [2, 3, 4]),
                 (ord('f'), [20]),
                 # old code doesn't distinguish string from seq-of-char
#                 (['w', 'w'], [2, 2]),
                 # old code just ignores invalid characters
#                 ('Q', [2]),
#                 ('fQ', ['2', 3]),
#                 ('fQ', ['2']),
                 (2, [2]),
                 # old code doesn't typecheck format
#                 ({}, {})
                 ]
        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 = [
# This ought to be illegal, but the old code doesn't prohibit it
#                ('$', '', ValueError),
#                ('Q', '', ValueError),
#                ('Q$', '', ValueError),
                 ('f', '', IndexError),
                 ('d', '', IndexError),
# This is an illegal packing, but the old code doesn't trap                 
#                 ('d', '2', IndexError),
#                 ('d', '22', IndexError),
#                 ('d', '222', IndexError),
#                 ('p', '\x01\0', IndexError),
#                ('w', '2', IndexError),
#                ('B', '\xff\0\0\0hello', IndexError),
#                  ('B', '\xff\0', IndexError),
                 ('w', '', IndexError),
                 ('f', 'hello', IndexError),
                 ('f', '', 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:
                try:
                    unpacker(format, values)
                except StandardError:
                    pass
                else:
                    raise AssertionError("didn't get exception: format %s, values %s, unpacker %s"
                                         % (`format`, `values`, `unpacker`))

    def test_unpack_repeated(self):
        cases = [(('df$',
                  '\x00\x00\x00\x00HP C LaserJet 4500-PS\x00Windows 4.0\x00\\print$\\WIN40\\0\\PSCRIPT.DRV\x00\\print$\\WIN40\\0\\PSCRIPT.DRV\x00\\print$\\WIN40\\0\\PSCRIPT.DRV\x00\\print$\\WIN40\\0\\PSCRIPT.HLP\x00\x00RAW\x00\\print$\\WIN40\\0\\readme.wri\x00\\print$\\WIN40\\0\\pscript.drv\x00\\print$\\WIN40\\0\\pscript.hlp\x00'),
                 ([0L, 'HP C LaserJet 4500-PS', 'Windows 4.0', '\\print$\\WIN40\\0\\PSCRIPT.DRV', '\\print$\\WIN40\\0\\PSCRIPT.DRV', '\\print$\\WIN40\\0\\PSCRIPT.DRV', '\\print$\\WIN40\\0\\PSCRIPT.HLP', '', 'RAW', '\\print$\\WIN40\\0\\readme.wri', '\\print$\\WIN40\\0\\pscript.drv', '\\print$\\WIN40\\0\\pscript.hlp'], ''))]
        for unpacker in both_unpackers:
            for input, expected in cases:
                result = apply(unpacker, input)
                if result != expected:
                    raise AssertionError("%s:\n     input: %s\n    output: %s\n  expected: %s" % (`unpacker`, `input`, `result`, `expected`))
        

if __name__ == '__main__':
    unittest.main()