dulwich/tests/test_objects.py

   1 # test_objects.py -- tests for objects.py
   2 # Copyright (C) 2007 James Westby <jw+debian@jameswestby.net>
   3 #
   4 # This program is free software; you can redistribute it and/or
   5 # modify it under the terms of the GNU General Public License
   6 # as published by the Free Software Foundation; version 2
   7 # of the License or (at your option) any later version of
   8 # the License.
   9 #
  10 # This program is distributed in the hope that it will be useful,
  11 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  12 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13 # GNU General Public License for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with this program; if not, write to the Free Software
  17 # Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston,
  18 # MA  02110-1301, USA.
  19
  20
  21 """Tests for git base objects."""
  22
  23 # TODO: Round-trip parse-serialize-parse and serialize-parse-serialize tests.
  24
  25
  26 import datetime
  27 import os
  28 import stat
  29 import unittest
  30
  31 from dulwich.errors import (
  32     ChecksumMismatch,
  33     ObjectFormatException,
  34     )
  35 from dulwich.objects import (
  36     Blob,
  37     Tree,
  38     Commit,
  39     Tag,
  40     format_timezone,
  41     hex_to_sha,
  42     sha_to_hex,
  43     hex_to_filename,
  44     check_hexsha,
  45     check_identity,
  46     parse_timezone,
  47     parse_tree,
  48     _parse_tree_py,
  49     )
  50 from dulwich.tests import (
  51     TestSkipped,
  52     )
  53
  54 a_sha = '6f670c0fb53f9463760b7295fbb814e965fb20c8'
  55 b_sha = '2969be3e8ee1c0222396a5611407e4769f14e54b'
  56 c_sha = '954a536f7819d40e6f637f849ee187dd10066349'
  57 tree_sha = '70c190eb48fa8bbb50ddc692a17b44cb781af7f6'
  58 tag_sha = '71033db03a03c6a36721efcf1968dd8f8e0cf023'
  59
  60
  61 try:
  62     from itertools import permutations
  63 except ImportError:
  64     # Implementation of permutations from Python 2.6 documentation:
  65     # http://docs.python.org/2.6/library/itertools.html#itertools.permutations
  66     # Copyright (c) 2001-2010 Python Software Foundation; All Rights Reserved
  67     def permutations(iterable, r=None):
  68         # permutations('ABCD', 2) --> AB AC AD BA BC BD CA CB CD DA DB DC
  69         # permutations(range(3)) --> 012 021 102 120 201 210
  70         pool = tuple(iterable)
  71         n = len(pool)
  72         r = n if r is None else r
  73         if r > n:
  74             return
  75         indices = range(n)
  76         cycles = range(n, n-r, -1)
  77         yield tuple(pool[i] for i in indices[:r])
  78         while n:
  79             for i in reversed(range(r)):
  80                 cycles[i] -= 1
  81                 if cycles[i] == 0:
  82                     indices[i:] = indices[i+1:] + indices[i:i+1]
  83                     cycles[i] = n - i
  84                 else:
  85                     j = cycles[i]
  86                     indices[i], indices[-j] = indices[-j], indices[i]
  87                     yield tuple(pool[i] for i in indices[:r])
  88                     break
  89             else:
  90                 return
  91
  92
  93 class TestHexToSha(unittest.TestCase):
  94
  95     def test_simple(self):
  96         self.assertEquals("\xab\xcd" * 10, hex_to_sha("abcd" * 10))
  97
  98     def test_reverse(self):
  99         self.assertEquals("abcd" * 10, sha_to_hex("\xab\xcd" * 10))
 100
 101
 102 class BlobReadTests(unittest.TestCase):
 103     """Test decompression of blobs"""
 104
 105     def get_sha_file(self, cls, base, sha):
 106         dir = os.path.join(os.path.dirname(__file__), 'data', base)
 107         return cls.from_path(hex_to_filename(dir, sha))
 108
 109     def get_blob(self, sha):
 110         """Return the blob named sha from the test data dir"""
 111         return self.get_sha_file(Blob, 'blobs', sha)
 112
 113     def get_tree(self, sha):
 114         return self.get_sha_file(Tree, 'trees', sha)
 115
 116     def get_tag(self, sha):
 117         return self.get_sha_file(Tag, 'tags', sha)
 118
 119     def commit(self, sha):
 120         return self.get_sha_file(Commit, 'commits', sha)
 121
 122     def test_decompress_simple_blob(self):
 123         b = self.get_blob(a_sha)
 124         self.assertEqual(b.data, 'test 1\n')
 125         self.assertEqual(b.sha().hexdigest(), a_sha)
 126
 127     def test_hash(self):
 128         b = self.get_blob(a_sha)
 129         self.assertEqual(hash(b.id), hash(b))
 130
 131     def test_parse_empty_blob_object(self):
 132         sha = 'e69de29bb2d1d6434b8b29ae775ad8c2e48c5391'
 133         b = self.get_blob(sha)
 134         self.assertEqual(b.data, '')
 135         self.assertEqual(b.id, sha)
 136         self.assertEqual(b.sha().hexdigest(), sha)
 137
 138     def test_create_blob_from_string(self):
 139         string = 'test 2\n'
 140         b = Blob.from_string(string)
 141         self.assertEqual(b.data, string)
 142         self.assertEqual(b.sha().hexdigest(), b_sha)
 143
 144     def test_chunks(self):
 145         string = 'test 5\n'
 146         b = Blob.from_string(string)
 147         self.assertEqual([string], b.chunked)
 148
 149     def test_set_chunks(self):
 150         b = Blob()
 151         b.chunked = ['te', 'st', ' 5\n']
 152         self.assertEqual('test 5\n', b.data)
 153         b.chunked = ['te', 'st', ' 6\n']
 154         self.assertEqual('test 6\n', b.as_raw_string())
 155
 156     def test_parse_legacy_blob(self):
 157         string = 'test 3\n'
 158         b = self.get_blob(c_sha)
 159         self.assertEqual(b.data, string)
 160         self.assertEqual(b.sha().hexdigest(), c_sha)
 161
 162     def test_eq(self):
 163         blob1 = self.get_blob(a_sha)
 164         blob2 = self.get_blob(a_sha)
 165         self.assertEqual(blob1, blob2)
 166
 167     def test_read_tree_from_file(self):
 168         t = self.get_tree(tree_sha)
 169         self.assertEqual(t.entries()[0], (33188, 'a', a_sha))
 170         self.assertEqual(t.entries()[1], (33188, 'b', b_sha))
 171
 172     def test_read_tag_from_file(self):
 173         t = self.get_tag(tag_sha)
 174         self.assertEqual(t.object, (Commit, '51b668fd5bf7061b7d6fa525f88803e6cfadaa51'))
 175         self.assertEqual(t.name,'signed')
 176         self.assertEqual(t.tagger,'Ali Sabil <ali.sabil@gmail.com>')
 177         self.assertEqual(t.tag_time, 1231203091)
 178         self.assertEqual(t.message, 'This is a signed tag\n-----BEGIN PGP SIGNATURE-----\nVersion: GnuPG v1.4.9 (GNU/Linux)\n\niEYEABECAAYFAkliqx8ACgkQqSMmLy9u/kcx5ACfakZ9NnPl02tOyYP6pkBoEkU1\n5EcAn0UFgokaSvS371Ym/4W9iJj6vh3h\n=ql7y\n-----END PGP SIGNATURE-----\n')
 179
 180     def test_read_commit_from_file(self):
 181         sha = '60dacdc733de308bb77bb76ce0fb0f9b44c9769e'
 182         c = self.commit(sha)
 183         self.assertEqual(c.tree, tree_sha)
 184         self.assertEqual(c.parents, ['0d89f20333fbb1d2f3a94da77f4981373d8f4310'])
 185         self.assertEqual(c.author,
 186             'James Westby <jw+debian@jameswestby.net>')
 187         self.assertEqual(c.committer,
 188             'James Westby <jw+debian@jameswestby.net>')
 189         self.assertEqual(c.commit_time, 1174759230)
 190         self.assertEqual(c.commit_timezone, 0)
 191         self.assertEqual(c.author_timezone, 0)
 192         self.assertEqual(c.message, 'Test commit\n')
 193
 194     def test_read_commit_no_parents(self):
 195         sha = '0d89f20333fbb1d2f3a94da77f4981373d8f4310'
 196         c = self.commit(sha)
 197         self.assertEqual(c.tree, '90182552c4a85a45ec2a835cadc3451bebdfe870')
 198         self.assertEqual(c.parents, [])
 199         self.assertEqual(c.author,
 200             'James Westby <jw+debian@jameswestby.net>')
 201         self.assertEqual(c.committer,
 202             'James Westby <jw+debian@jameswestby.net>')
 203         self.assertEqual(c.commit_time, 1174758034)
 204         self.assertEqual(c.commit_timezone, 0)
 205         self.assertEqual(c.author_timezone, 0)
 206         self.assertEqual(c.message, 'Test commit\n')
 207
 208     def test_read_commit_two_parents(self):
 209         sha = '5dac377bdded4c9aeb8dff595f0faeebcc8498cc'
 210         c = self.commit(sha)
 211         self.assertEqual(c.tree, 'd80c186a03f423a81b39df39dc87fd269736ca86')
 212         self.assertEqual(c.parents, ['ab64bbdcc51b170d21588e5c5d391ee5c0c96dfd',
 213                                        '4cffe90e0a41ad3f5190079d7c8f036bde29cbe6'])
 214         self.assertEqual(c.author,
 215             'James Westby <jw+debian@jameswestby.net>')
 216         self.assertEqual(c.committer,
 217             'James Westby <jw+debian@jameswestby.net>')
 218         self.assertEqual(c.commit_time, 1174773719)
 219         self.assertEqual(c.commit_timezone, 0)
 220         self.assertEqual(c.author_timezone, 0)
 221         self.assertEqual(c.message, 'Merge ../b\n')
 222
 223     def test_check_id(self):
 224         wrong_sha = '1' * 40
 225         b = self.get_blob(wrong_sha)
 226         self.assertEqual(wrong_sha, b.id)
 227         self.assertRaises(ChecksumMismatch, b.check)
 228         self.assertEqual('742b386350576589175e374a5706505cbd17680c', b.id)
 229
 230
 231 class ShaFileCheckTests(unittest.TestCase):
 232
 233     def assertCheckFails(self, cls, data):
 234         obj = cls()
 235         def do_check():
 236             obj.set_raw_string(data)
 237             obj.check()
 238         self.assertRaises(ObjectFormatException, do_check)
 239
 240     def assertCheckSucceeds(self, cls, data):
 241         obj = cls()
 242         obj.set_raw_string(data)
 243         self.assertEqual(None, obj.check())
 244
 245
 246 class CommitSerializationTests(unittest.TestCase):
 247
 248     def make_base(self):
 249         c = Commit()
 250         c.tree = 'd80c186a03f423a81b39df39dc87fd269736ca86'
 251         c.parents = ['ab64bbdcc51b170d21588e5c5d391ee5c0c96dfd', '4cffe90e0a41ad3f5190079d7c8f036bde29cbe6']
 252         c.author = 'James Westby <jw+debian@jameswestby.net>'
 253         c.committer = 'James Westby <jw+debian@jameswestby.net>'
 254         c.commit_time = 1174773719
 255         c.author_time = 1174773719
 256         c.commit_timezone = 0
 257         c.author_timezone = 0
 258         c.message =  'Merge ../b\n'
 259         return c
 260
 261     def test_encoding(self):
 262         c = self.make_base()
 263         c.encoding = "iso8859-1"
 264         self.assertTrue("encoding iso8859-1\n" in c.as_raw_string())
 265
 266     def test_short_timestamp(self):
 267         c = self.make_base()
 268         c.commit_time = 30
 269         c1 = Commit()
 270         c1.set_raw_string(c.as_raw_string())
 271         self.assertEquals(30, c1.commit_time)
 272
 273     def test_raw_length(self):
 274         c = self.make_base()
 275         self.assertEquals(len(c.as_raw_string()), c.raw_length())
 276
 277     def test_simple(self):
 278         c = self.make_base()
 279         self.assertEquals(c.id, '5dac377bdded4c9aeb8dff595f0faeebcc8498cc')
 280         self.assertEquals(
 281                 'tree d80c186a03f423a81b39df39dc87fd269736ca86\n'
 282                 'parent ab64bbdcc51b170d21588e5c5d391ee5c0c96dfd\n'
 283                 'parent 4cffe90e0a41ad3f5190079d7c8f036bde29cbe6\n'
 284                 'author James Westby <jw+debian@jameswestby.net> 1174773719 +0000\n'
 285                 'committer James Westby <jw+debian@jameswestby.net> 1174773719 +0000\n'
 286                 '\n'
 287                 'Merge ../b\n', c.as_raw_string())
 288
 289     def test_timezone(self):
 290         c = self.make_base()
 291         c.commit_timezone = 5 * 60
 292         self.assertTrue(" +0005\n" in c.as_raw_string())
 293
 294     def test_neg_timezone(self):
 295         c = self.make_base()
 296         c.commit_timezone = -1 * 3600
 297         self.assertTrue(" -0100\n" in c.as_raw_string())
 298
 299
 300 default_committer = 'James Westby <jw+debian@jameswestby.net> 1174773719 +0000'
 301
 302 class CommitParseTests(ShaFileCheckTests):
 303
 304     def make_commit_lines(self,
 305                           tree='d80c186a03f423a81b39df39dc87fd269736ca86',
 306                           parents=['ab64bbdcc51b170d21588e5c5d391ee5c0c96dfd',
 307                                    '4cffe90e0a41ad3f5190079d7c8f036bde29cbe6'],
 308                           author=default_committer,
 309                           committer=default_committer,
 310                           encoding=None,
 311                           message='Merge ../b\n',
 312                           extra=None):
 313         lines = []
 314         if tree is not None:
 315             lines.append('tree %s' % tree)
 316         if parents is not None:
 317             lines.extend('parent %s' % p for p in parents)
 318         if author is not None:
 319             lines.append('author %s' % author)
 320         if committer is not None:
 321             lines.append('committer %s' % committer)
 322         if encoding is not None:
 323             lines.append('encoding %s' % encoding)
 324         if extra is not None:
 325             for name, value in sorted(extra.iteritems()):
 326                 lines.append('%s %s' % (name, value))
 327         lines.append('')
 328         if message is not None:
 329             lines.append(message)
 330         return lines
 331
 332     def make_commit_text(self, **kwargs):
 333         return '\n'.join(self.make_commit_lines(**kwargs))
 334
 335     def test_simple(self):
 336         c = Commit.from_string(self.make_commit_text())
 337         self.assertEquals('Merge ../b\n', c.message)
 338         self.assertEquals('James Westby <jw+debian@jameswestby.net>', c.author)
 339         self.assertEquals('James Westby <jw+debian@jameswestby.net>',
 340                           c.committer)
 341         self.assertEquals('d80c186a03f423a81b39df39dc87fd269736ca86', c.tree)
 342         self.assertEquals(['ab64bbdcc51b170d21588e5c5d391ee5c0c96dfd',
 343                            '4cffe90e0a41ad3f5190079d7c8f036bde29cbe6'],
 344                           c.parents)
 345         expected_time = datetime.datetime(2007, 3, 24, 22, 1, 59)
 346         self.assertEquals(expected_time,
 347                           datetime.datetime.utcfromtimestamp(c.commit_time))
 348         self.assertEquals(0, c.commit_timezone)
 349         self.assertEquals(expected_time,
 350                           datetime.datetime.utcfromtimestamp(c.author_time))
 351         self.assertEquals(0, c.author_timezone)
 352         self.assertEquals(None, c.encoding)
 353
 354     def test_custom(self):
 355         c = Commit.from_string(self.make_commit_text(
 356           extra={'extra-field': 'data'}))
 357         self.assertEquals([('extra-field', 'data')], c.extra)
 358
 359     def test_encoding(self):
 360         c = Commit.from_string(self.make_commit_text(encoding='UTF-8'))
 361         self.assertEquals('UTF-8', c.encoding)
 362
 363     def test_check(self):
 364         self.assertCheckSucceeds(Commit, self.make_commit_text())
 365         self.assertCheckSucceeds(Commit, self.make_commit_text(parents=None))
 366         self.assertCheckSucceeds(Commit,
 367                                  self.make_commit_text(encoding='UTF-8'))
 368
 369         self.assertCheckFails(Commit, self.make_commit_text(tree='xxx'))
 370         self.assertCheckFails(Commit, self.make_commit_text(
 371           parents=[a_sha, 'xxx']))
 372         bad_committer = "some guy without an email address 1174773719 +0000"
 373         self.assertCheckFails(Commit,
 374                               self.make_commit_text(committer=bad_committer))
 375         self.assertCheckFails(Commit,
 376                               self.make_commit_text(author=bad_committer))
 377         self.assertCheckFails(Commit, self.make_commit_text(author=None))
 378         self.assertCheckFails(Commit, self.make_commit_text(committer=None))
 379         self.assertCheckFails(Commit, self.make_commit_text(
 380           author=None, committer=None))
 381
 382     def test_check_duplicates(self):
 383         # duplicate each of the header fields
 384         for i in xrange(5):
 385             lines = self.make_commit_lines(parents=[a_sha], encoding='UTF-8')
 386             lines.insert(i, lines[i])
 387             text = '\n'.join(lines)
 388             if lines[i].startswith('parent'):
 389                 # duplicate parents are ok for now
 390                 self.assertCheckSucceeds(Commit, text)
 391             else:
 392                 self.assertCheckFails(Commit, text)
 393
 394     def test_check_order(self):
 395         lines = self.make_commit_lines(parents=[a_sha], encoding='UTF-8')
 396         headers = lines[:5]
 397         rest = lines[5:]
 398         # of all possible permutations, ensure only the original succeeds
 399         for perm in permutations(headers):
 400             perm = list(perm)
 401             text = '\n'.join(perm + rest)
 402             if perm == headers:
 403                 self.assertCheckSucceeds(Commit, text)
 404             else:
 405                 self.assertCheckFails(Commit, text)
 406
 407
 408 class TreeTests(ShaFileCheckTests):
 409
 410     def test_simple(self):
 411         myhexsha = "d80c186a03f423a81b39df39dc87fd269736ca86"
 412         x = Tree()
 413         x["myname"] = (0100755, myhexsha)
 414         self.assertEquals('100755 myname\0' + hex_to_sha(myhexsha),
 415                 x.as_raw_string())
 416
 417     def test_tree_dir_sort(self):
 418         x = Tree()
 419         x["a.c"] = (0100755, "d80c186a03f423a81b39df39dc87fd269736ca86")
 420         x["a"] = (stat.S_IFDIR, "d80c186a03f423a81b39df39dc87fd269736ca86")
 421         x["a/c"] = (stat.S_IFDIR, "d80c186a03f423a81b39df39dc87fd269736ca86")
 422         self.assertEquals(["a.c", "a", "a/c"], [p[0] for p in x.iteritems()])
 423
 424     def _do_test_parse_tree(self, parse_tree):
 425         dir = os.path.join(os.path.dirname(__file__), 'data', 'trees')
 426         o = Tree.from_path(hex_to_filename(dir, tree_sha))
 427         self.assertEquals([('a', 0100644, a_sha), ('b', 0100644, b_sha)],
 428                           list(parse_tree(o.as_raw_string())))
 429
 430     def test_parse_tree(self):
 431         self._do_test_parse_tree(_parse_tree_py)
 432
 433     def test_parse_tree_extension(self):
 434         if parse_tree is _parse_tree_py:
 435             raise TestSkipped('parse_tree extension not found')
 436         self._do_test_parse_tree(parse_tree)
 437
 438     def test_check(self):
 439         t = Tree
 440         sha = hex_to_sha(a_sha)
 441
 442         # filenames
 443         self.assertCheckSucceeds(t, '100644 .a\0%s' % sha)
 444         self.assertCheckFails(t, '100644 \0%s' % sha)
 445         self.assertCheckFails(t, '100644 .\0%s' % sha)
 446         self.assertCheckFails(t, '100644 a/a\0%s' % sha)
 447         self.assertCheckFails(t, '100644 ..\0%s' % sha)
 448
 449         # modes
 450         self.assertCheckSucceeds(t, '100644 a\0%s' % sha)
 451         self.assertCheckSucceeds(t, '100755 a\0%s' % sha)
 452         self.assertCheckSucceeds(t, '160000 a\0%s' % sha)
 453         # TODO more whitelisted modes
 454         self.assertCheckFails(t, '123456 a\0%s' % sha)
 455         self.assertCheckFails(t, '123abc a\0%s' % sha)
 456
 457         # shas
 458         self.assertCheckFails(t, '100644 a\0%s' % ('x' * 5))
 459         self.assertCheckFails(t, '100644 a\0%s' % ('x' * 18 + '\0'))
 460         self.assertCheckFails(t, '100644 a\0%s\n100644 b\0%s' % ('x' * 21, sha))
 461
 462         # ordering
 463         sha2 = hex_to_sha(b_sha)
 464         self.assertCheckSucceeds(t, '100644 a\0%s\n100644 b\0%s' % (sha, sha))
 465         self.assertCheckSucceeds(t, '100644 a\0%s\n100644 b\0%s' % (sha, sha2))
 466         self.assertCheckFails(t, '100644 a\0%s\n100755 a\0%s' % (sha, sha2))
 467         self.assertCheckFails(t, '100644 b\0%s\n100644 a\0%s' % (sha2, sha))
 468
 469     def test_iter(self):
 470         t = Tree()
 471         t["foo"] = (0100644, a_sha)
 472         self.assertEquals(set(["foo"]), set(t))
 473
 474
 475 class TagSerializeTests(unittest.TestCase):
 476
 477     def test_serialize_simple(self):
 478         x = Tag()
 479         x.tagger = "Jelmer Vernooij <jelmer@samba.org>"
 480         x.name = "0.1"
 481         x.message = "Tag 0.1"
 482         x.object = (Blob, "d80c186a03f423a81b39df39dc87fd269736ca86")
 483         x.tag_time = 423423423
 484         x.tag_timezone = 0
 485         self.assertEquals("""object d80c186a03f423a81b39df39dc87fd269736ca86
 486 type blob
 487 tag 0.1
 488 tagger Jelmer Vernooij <jelmer@samba.org> 423423423 +0000
 489
 490 Tag 0.1""", x.as_raw_string())
 491
 492
 493 default_tagger = ('Linus Torvalds <torvalds@woody.linux-foundation.org> '
 494                   '1183319674 -0700')
 495 default_message = """Linux 2.6.22-rc7
 496 -----BEGIN PGP SIGNATURE-----
 497 Version: GnuPG v1.4.7 (GNU/Linux)
 498
 499 iD8DBQBGiAaAF3YsRnbiHLsRAitMAKCiLboJkQECM/jpYsY3WPfvUgLXkACgg3ql
 500 OK2XeQOiEeXtT76rV4t2WR4=
 501 =ivrA
 502 -----END PGP SIGNATURE-----
 503 """
 504
 505
 506 class TagParseTests(ShaFileCheckTests):
 507     def make_tag_lines(self,
 508                        object_sha="a38d6181ff27824c79fc7df825164a212eff6a3f",
 509                        object_type_name="commit",
 510                        name="v2.6.22-rc7",
 511                        tagger=default_tagger,
 512                        message=default_message):
 513         lines = []
 514         if object_sha is not None:
 515             lines.append("object %s" % object_sha)
 516         if object_type_name is not None:
 517             lines.append("type %s" % object_type_name)
 518         if name is not None:
 519             lines.append("tag %s" % name)
 520         if tagger is not None:
 521             lines.append("tagger %s" % tagger)
 522         lines.append("")
 523         if message is not None:
 524             lines.append(message)
 525         return lines
 526
 527     def make_tag_text(self, **kwargs):
 528         return "\n".join(self.make_tag_lines(**kwargs))
 529
 530     def test_parse(self):
 531         x = Tag()
 532         x.set_raw_string(self.make_tag_text())
 533         self.assertEquals(
 534             "Linus Torvalds <torvalds@woody.linux-foundation.org>", x.tagger)
 535         self.assertEquals("v2.6.22-rc7", x.name)
 536         object_type, object_sha = x.object
 537         self.assertEquals("a38d6181ff27824c79fc7df825164a212eff6a3f",
 538                           object_sha)
 539         self.assertEquals(Commit, object_type)
 540         self.assertEquals(datetime.datetime.utcfromtimestamp(x.tag_time),
 541                           datetime.datetime(2007, 7, 1, 19, 54, 34))
 542         self.assertEquals(-25200, x.tag_timezone)
 543
 544     def test_parse_no_tagger(self):
 545         x = Tag()
 546         x.set_raw_string(self.make_tag_text(tagger=None))
 547         self.assertEquals(None, x.tagger)
 548         self.assertEquals("v2.6.22-rc7", x.name)
 549
 550     def test_check(self):
 551         self.assertCheckSucceeds(Tag, self.make_tag_text())
 552         self.assertCheckFails(Tag, self.make_tag_text(object_sha=None))
 553         self.assertCheckFails(Tag, self.make_tag_text(object_type_name=None))
 554         self.assertCheckFails(Tag, self.make_tag_text(name=None))
 555         self.assertCheckFails(Tag, self.make_tag_text(name=''))
 556         self.assertCheckFails(Tag, self.make_tag_text(
 557           object_type_name="foobar"))
 558         self.assertCheckFails(Tag, self.make_tag_text(
 559           tagger="some guy without an email address 1183319674 -0700"))
 560         self.assertCheckFails(Tag, self.make_tag_text(
 561           tagger=("Linus Torvalds <torvalds@woody.linux-foundation.org> "
 562                   "Sun 7 Jul 2007 12:54:34 +0700")))
 563         self.assertCheckFails(Tag, self.make_tag_text(object_sha="xxx"))
 564
 565     def test_check_duplicates(self):
 566         # duplicate each of the header fields
 567         for i in xrange(4):
 568             lines = self.make_tag_lines()
 569             lines.insert(i, lines[i])
 570             self.assertCheckFails(Tag, '\n'.join(lines))
 571
 572     def test_check_order(self):
 573         lines = self.make_tag_lines()
 574         headers = lines[:4]
 575         rest = lines[4:]
 576         # of all possible permutations, ensure only the original succeeds
 577         for perm in permutations(headers):
 578             perm = list(perm)
 579             text = '\n'.join(perm + rest)
 580             if perm == headers:
 581                 self.assertCheckSucceeds(Tag, text)
 582             else:
 583                 self.assertCheckFails(Tag, text)
 584
 585
 586 class CheckTests(unittest.TestCase):
 587
 588     def test_check_hexsha(self):
 589         check_hexsha(a_sha, "failed to check good sha")
 590         self.assertRaises(ObjectFormatException, check_hexsha, '1' * 39,
 591                           'sha too short')
 592         self.assertRaises(ObjectFormatException, check_hexsha, '1' * 41,
 593                           'sha too long')
 594         self.assertRaises(ObjectFormatException, check_hexsha, 'x' * 40,
 595                           'invalid characters')
 596
 597     def test_check_identity(self):
 598         check_identity("Dave Borowitz <dborowitz@google.com>",
 599                        "failed to check good identity")
 600         check_identity("<dborowitz@google.com>",
 601                        "failed to check good identity")
 602         self.assertRaises(ObjectFormatException, check_identity,
 603                           "Dave Borowitz", "no email")
 604         self.assertRaises(ObjectFormatException, check_identity,
 605                           "Dave Borowitz <dborowitz", "incomplete email")
 606         self.assertRaises(ObjectFormatException, check_identity,
 607                           "dborowitz@google.com>", "incomplete email")
 608         self.assertRaises(ObjectFormatException, check_identity,
 609                           "Dave Borowitz <<dborowitz@google.com>", "typo")
 610         self.assertRaises(ObjectFormatException, check_identity,
 611                           "Dave Borowitz <dborowitz@google.com>>", "typo")
 612         self.assertRaises(ObjectFormatException, check_identity,
 613                           "Dave Borowitz <dborowitz@google.com>xxx",
 614                           "trailing characters")
 615
 616
 617 class TimezoneTests(unittest.TestCase):
 618
 619     def test_parse_timezone_utc(self):
 620         self.assertEquals((0, False), parse_timezone("+0000"))
 621
 622     def test_parse_timezone_utc_negative(self):
 623         self.assertEquals((0, True), parse_timezone("-0000"))
 624
 625     def test_generate_timezone_utc(self):
 626         self.assertEquals("+0000", format_timezone(0))
 627
 628     def test_generate_timezone_utc_negative(self):
 629         self.assertEquals("-0000", format_timezone(0, True))
 630
 631     def test_parse_timezone_cet(self):
 632         self.assertEquals((60 * 60, False), parse_timezone("+0100"))
 633
 634     def test_format_timezone_cet(self):
 635         self.assertEquals("+0100", format_timezone(60 * 60))
 636
 637     def test_format_timezone_pdt(self):
 638         self.assertEquals("-0400", format_timezone(-4 * 60 * 60))
 639
 640     def test_parse_timezone_pdt(self):
 641         self.assertEquals((-4 * 60 * 60, False), parse_timezone("-0400"))
 642
 643     def test_format_timezone_pdt_half(self):
 644         self.assertEquals("-0440",
 645             format_timezone(int(((-4 * 60) - 40) * 60)))
 646
 647     def test_parse_timezone_pdt_half(self):
 648         self.assertEquals((((-4 * 60) - 40) * 60, False),
 649             parse_timezone("-0440"))