source/python/examples/tdbpack/test_tdbpack.py

   1 #! /usr/bin/env python2.2
   2
   3 __doc__ = """test case for samba.tdbpack functions
   4
   5 tdbpack provides a means of pickling values into binary formats
   6 compatible with that used by the samba tdbpack()/tdbunpack()
   7 functions.
   8
   9 Numbers are always stored in little-endian format; strings are stored
  10 in either DOS or Unix codepage as appropriate.
  11
  12 The format for any particular element is encoded as a short ASCII
  13 string, with one character per field."""
  14
  15 # Copyright (C) 2002 Hewlett-Packard.
  16
  17 __author__ = 'Martin Pool <mbp@sourcefrog.net>'
  18
  19 import unittest
  20 import oldtdbutil
  21 import samba.tdbpack
  22
  23 both_unpackers = (samba.tdbpack.unpack, oldtdbutil.unpack)
  24 both_packers = (samba.tdbpack.pack, oldtdbutil.pack)
  25
  26
  27
  28 # #             ('B', [10, 'hello'], '\x0a\0\0\0hello'),
  29 #              ('BB', [11, 'hello\0world', 3, 'now'],
  30 #               '\x0b\0\0\0hello\0world\x03\0\0\0now'),
  31 #              ('pd', [1, 10], '\x01\0\0\0\x0a\0\0\0'),
  32 #              ('BBB', [5, 'hello', 0, '', 5, 'world'],
  33 #               '\x05\0\0\0hello\0\0\0\0\x05\0\0\0world'),
  34
  35              # strings are sequences in Python, there's no getting away
  36              # from it
  37 #             ('ffff', 'evil', 'e\0v\0i\0l\0'),
  38 #              ('BBBB', 'evil',
  39 #               '\x01\0\0\0e'
  40 #               '\x01\0\0\0v'
  41 #               '\x01\0\0\0i'
  42 #               '\x01\0\0\0l'),
  43
  44 #              ('', [], ''),
  45
  46 #              # exercise some long strings
  47 #              ('PP', ['hello' * 255, 'world' * 255],
  48 #               'hello' * 255 + '\0' + 'world' * 255 + '\0'),
  49 #              ('PP', ['hello' * 40000, 'world' * 50000],
  50 #               'hello' * 40000 + '\0' + 'world' * 50000 + '\0'),
  51 #              ('B', [(5*51), 'hello' * 51], '\xff\0\0\0' + 'hello' * 51),
  52 #              ('BB', [(5 * 40000), 'hello' * 40000,
  53 #                      (5 * 50000), 'world' * 50000],
  54 #               '\x40\x0d\x03\0' + 'hello' * 40000 + '\x90\xd0\x03\x00' + 'world' * 50000),
  55
  56
  57 class PackTests(unittest.TestCase):
  58     symm_cases = [
  59              ('w', [42], '\x2a\0'),
  60              ('www', [42, 2, 69], '\x2a\0\x02\0\x45\0'),
  61              ('wd', [42, 256], '\x2a\0\0\x01\0\0'),
  62              ('w', [0], '\0\0'),
  63              ('w', [255], '\xff\0'),
  64              ('w', [256], '\0\x01'),
  65              ('w', [0xdead], '\xad\xde'),
  66              ('w', [0xffff], '\xff\xff'),
  67              ('p', [0], '\0\0\0\0'),
  68              ('p', [1], '\x01\0\0\0'),
  69              ('d', [0x01020304], '\x04\x03\x02\x01'),
  70              ('d', [0x7fffffff], '\xff\xff\xff\x7f'),
  71              ('d', [0x80000000L], '\x00\x00\x00\x80'),
  72              ('d', [0x80000069L], '\x69\x00\x00\x80'),
  73              ('d', [0xffffffffL], '\xff\xff\xff\xff'),
  74              ('d', [0xffffff00L], '\x00\xff\xff\xff'),
  75              ('ddd', [1, 10, 50], '\x01\0\0\0\x0a\0\0\0\x32\0\0\0'),
  76              ('ff', ['hello', 'world'], 'hello\0world\0'),
  77              ('fP', ['hello', 'world'], 'hello\0world\0'),
  78              ('PP', ['hello', 'world'], 'hello\0world\0'),
  79              ('B', [0, ''], '\0\0\0\0'),
  80 # old implementation is wierd when string is not the right length
  81 #             ('B', [2, 'hello'], '\x0a\0\0\0hello'),
  82              ('B', [5, 'hello'], '\x05\0\0\0hello'),
  83              ]
  84
  85     def test_symmetric(self):
  86         """Cookbook of symmetric pack/unpack tests
  87         """
  88         for packer in [samba.tdbpack.pack]: # both_packers:
  89             for unpacker in both_unpackers:
  90                 for format, values, expected in self.symm_cases:
  91                     out_packed = packer(format, values)
  92                     self.assertEquals(out_packed, expected)
  93                     out, rest = unpacker(format, expected)
  94                     self.assertEquals(rest, '')
  95                     self.assertEquals(list(values), list(out))
  96
  97     def test_large(self):
  98         """Test large pack/unpack strings"""
  99         large_cases = [('w' * 1000, xrange(1000)), ]
 100         for packer in both_packers:
 101             for unpacker in both_unpackers:
 102                 for format, values in large_cases:
 103                     packed = packer(format, values)
 104                     out, rest = unpacker(format, packed)
 105                     self.assertEquals(rest, '')
 106                     self.assertEquals(list(values), list(out))
 107
 108
 109     def test_pack(self):
 110         """Cookbook of expected pack values
 111
 112         These can't be used for the symmetric test because the unpacked value is
 113         not "canonical".
 114         """
 115         cases = [('w', (42,), '\x2a\0'),
 116                  ]
 117
 118         for packer in both_packers:
 119             for format, values, expected in cases:
 120                 self.assertEquals(packer(format, values), expected)
 121
 122     def test_unpack_extra(self):
 123         # Test leftover data
 124         for unpacker in both_unpackers:
 125             for format, values, packed in self.symm_cases:
 126                 out, rest = unpacker(format, packed + 'hello sailor!')
 127                 self.assertEquals(rest, 'hello sailor!')
 128                 self.assertEquals(list(values), list(out))
 129
 130
 131     def test_pack_extra(self):
 132         """Leftover values when packing"""
 133         cases = [
 134             ('d', [10, 20], [10]),
 135             ('d', [10, 'hello'], [10]),
 136             ('ff', ['hello', 'world', 'sailor'], ['hello', 'world']),
 137             ]
 138         for unpacker in both_unpackers:
 139             for packer in both_packers:
 140                 for format, values, chopped in cases:
 141                     bin = packer(format, values)
 142                     out, rest = unpacker(format, bin)
 143                     self.assertEquals(list(out), list(chopped))
 144                     self.assertEquals(rest, '')
 145
 146
 147     def test_unpack(self):
 148         """Cookbook of tricky unpack tests"""
 149         cases = [
 150                  # Apparently I couldn't think of any tests that weren't
 151                  # symmetric :-/
 152                  ]
 153         for unpacker in both_unpackers:
 154             for format, values, expected in cases:
 155                 out, rest = unpacker(format, expected)
 156                 self.assertEquals(rest, '')
 157                 self.assertEquals(list(values), list(out))
 158
 159
 160     def test_pack_failures(self):
 161         """Expected errors for incorrect packing"""
 162         cases = [('w', []),
 163 #                 ('w', ()),
 164 #                 ('w', {}),
 165                  ('ww', [2]),
 166                  ('w', 2),
 167 #                  ('w', None),
 168                  ('wwwwwwwwwwww', []),
 169 #                 ('w', [0x60A15EC5L]),
 170 #                 ('w', [None]),
 171                  ('d', []),
 172                  ('p', []),
 173                  ('f', [2]),
 174                  ('P', [None]),
 175                  ('P', ()),
 176                  ('f', [hex]),
 177                  ('fw', ['hello']),
 178 #                  ('f', [u'hello']),
 179                  ('B', [2]),
 180                  (None, [2, 3, 4]),
 181                  (ord('f'), [20]),
 182                  # old code doesn't distinguish string from seq-of-char
 183 #                 (['w', 'w'], [2, 2]),
 184                  # old code just ignores invalid characters
 185 #                 ('Q', [2]),
 186 #                 ('fQ', ['2', 3]),
 187 #                 ('fQ', ['2']),
 188                  (2, [2]),
 189                  # old code doesn't typecheck format
 190 #                 ({}, {})
 191                  ]
 192         for packer in both_packers:
 193             for format, values in cases:
 194                 try:
 195                     packer(format, values)
 196                 except StandardError:
 197                     pass
 198                 else:
 199                     raise AssertionError("didn't get exception: format %s, values %s, packer %s"
 200                                          % (`format`, `values`, `packer`))
 201
 202
 203     def test_unpack_failures(self):
 204         """Expected errors for incorrect unpacking"""
 205         cases = [
 206 # This ought to be illegal, but the old code doesn't prohibit it
 207 #                ('$', '', ValueError),
 208 #                ('Q', '', ValueError),
 209 #                ('Q$', '', ValueError),
 210                  ('f', '', IndexError),
 211                  ('d', '', IndexError),
 212 # This is an illegal packing, but the old code doesn't trap
 213 #                 ('d', '2', IndexError),
 214 #                 ('d', '22', IndexError),
 215 #                 ('d', '222', IndexError),
 216 #                 ('p', '\x01\0', IndexError),
 217 #                ('w', '2', IndexError),
 218 #                ('B', '\xff\0\0\0hello', IndexError),
 219 #                  ('B', '\xff\0', IndexError),
 220                  ('w', '', IndexError),
 221                  ('f', 'hello', IndexError),
 222                  ('f', '', IndexError),
 223 #                ('B', '\x01\0\0\0', IndexError),
 224 #                 ('B', '\x05\0\0\0hell', IndexError),
 225                  ('B', '\xff\xff\xff\xff', ValueError),
 226 #                 ('B', 'foobar', IndexError),
 227 #                 ('BB', '\x01\0\0\0a\x01', IndexError),
 228                  ]
 229
 230         for unpacker in both_unpackers:
 231             for format, values, throwable_class in cases:
 232                 try:
 233                     unpacker(format, values)
 234                 except StandardError:
 235                     pass
 236                 else:
 237                     raise AssertionError("didn't get exception: format %s, values %s, unpacker %s"
 238                                          % (`format`, `values`, `unpacker`))
 239
 240     def test_unpack_repeated(self):
 241         cases = [(('df$',
 242                   '\x00\x00\x00\x00HP C LaserJet 4500-PS\x00Windows 4.0\x00\\print$\\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'),
 243                  ([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'], ''))]
 244         for unpacker in both_unpackers:
 245             for input, expected in cases:
 246                 result = apply(unpacker, input)
 247                 if result != expected:
 248                     raise AssertionError("%s:\n     input: %s\n    output: %s\n  expected: %s" % (`unpacker`, `input`, `result`, `expected`))
 249
 250
 251 if __name__ == '__main__':
 252     unittest.main()
 253