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 from utils import (
  54     make_commit,
  55     make_object,
  56     )
  57
  58 a_sha = '6f670c0fb53f9463760b7295fbb814e965fb20c8'
  59 b_sha = '2969be3e8ee1c0222396a5611407e4769f14e54b'
  60 c_sha = '954a536f7819d40e6f637f849ee187dd10066349'
  61 tree_sha = '70c190eb48fa8bbb50ddc692a17b44cb781af7f6'
  62 tag_sha = '71033db03a03c6a36721efcf1968dd8f8e0cf023'
  63
  64
  65 try:
  66     from itertools import permutations
  67 except ImportError:
  68     # Implementation of permutations from Python 2.6 documentation:
  69     # http://docs.python.org/2.6/library/itertools.html#itertools.permutations
  70     # Copyright (c) 2001-2010 Python Software Foundation; All Rights Reserved
  71     # Modified syntax slightly to run under Python 2.4.
  72     def permutations(iterable, r=None):
  73         # permutations('ABCD', 2) --> AB AC AD BA BC BD CA CB CD DA DB DC
  74         # permutations(range(3)) --> 012 021 102 120 201 210
  75         pool = tuple(iterable)
  76         n = len(pool)
  77         if r is None:
  78             r = n
  79         if r > n:
  80             return
  81         indices = range(n)
  82         cycles = range(n, n-r, -1)
  83         yield tuple(pool[i] for i in indices[:r])
  84         while n:
  85             for i in reversed(range(r)):
  86                 cycles[i] -= 1
  87                 if cycles[i] == 0:
  88                     indices[i:] = indices[i+1:] + indices[i:i+1]
  89                     cycles[i] = n - i
  90                 else:
  91                     j = cycles[i]
  92                     indices[i], indices[-j] = indices[-j], indices[i]
  93                     yield tuple(pool[i] for i in indices[:r])
  94                     break
  95             else:
  96                 return
  97
  98
  99 class TestHexToSha(unittest.TestCase):
 100
 101     def test_simple(self):
 102         self.assertEquals("\xab\xcd" * 10, hex_to_sha("abcd" * 10))
 103
 104     def test_reverse(self):
 105         self.assertEquals("abcd" * 10, sha_to_hex("\xab\xcd" * 10))
 106
 107
 108 class BlobReadTests(unittest.TestCase):
 109     """Test decompression of blobs"""
 110
 111     def get_sha_file(self, cls, base, sha):
 112         dir = os.path.join(os.path.dirname(__file__), 'data', base)
 113         return cls.from_path(hex_to_filename(dir, sha))
 114
 115     def get_blob(self, sha):
 116         """Return the blob named sha from the test data dir"""
 117         return self.get_sha_file(Blob, 'blobs', sha)
 118
 119     def get_tree(self, sha):
 120         return self.get_sha_file(Tree, 'trees', sha)
 121
 122     def get_tag(self, sha):
 123         return self.get_sha_file(Tag, 'tags', sha)
 124
 125     def commit(self, sha):
 126         return self.get_sha_file(Commit, 'commits', sha)
 127
 128     def test_decompress_simple_blob(self):
 129         b = self.get_blob(a_sha)
 130         self.assertEqual(b.data, 'test 1\n')
 131         self.assertEqual(b.sha().hexdigest(), a_sha)
 132
 133     def test_hash(self):
 134         b = self.get_blob(a_sha)
 135         self.assertEqual(hash(b.id), hash(b))
 136
 137     def test_parse_empty_blob_object(self):
 138         sha = 'e69de29bb2d1d6434b8b29ae775ad8c2e48c5391'
 139         b = self.get_blob(sha)
 140         self.assertEqual(b.data, '')
 141         self.assertEqual(b.id, sha)
 142         self.assertEqual(b.sha().hexdigest(), sha)
 143
 144     def test_create_blob_from_string(self):
 145         string = 'test 2\n'
 146         b = Blob.from_string(string)
 147         self.assertEqual(b.data, string)
 148         self.assertEqual(b.sha().hexdigest(), b_sha)
 149
 150     def test_chunks(self):
 151         string = 'test 5\n'
 152         b = Blob.from_string(string)
 153         self.assertEqual([string], b.chunked)
 154
 155     def test_set_chunks(self):
 156         b = Blob()
 157         b.chunked = ['te', 'st', ' 5\n']
 158         self.assertEqual('test 5\n', b.data)
 159         b.chunked = ['te', 'st', ' 6\n']
 160         self.assertEqual('test 6\n', b.as_raw_string())
 161
 162     def test_parse_legacy_blob(self):
 163         string = 'test 3\n'
 164         b = self.get_blob(c_sha)
 165         self.assertEqual(b.data, string)
 166         self.assertEqual(b.sha().hexdigest(), c_sha)
 167
 168     def test_eq(self):
 169         blob1 = self.get_blob(a_sha)
 170         blob2 = self.get_blob(a_sha)
 171         self.assertEqual(blob1, blob2)
 172
 173     def test_read_tree_from_file(self):
 174         t = self.get_tree(tree_sha)
 175         self.assertEqual(t.entries()[0], (33188, 'a', a_sha))
 176         self.assertEqual(t.entries()[1], (33188, 'b', b_sha))
 177
 178     def test_read_tag_from_file(self):
 179         t = self.get_tag(tag_sha)
 180         self.assertEqual(t.object, (Commit, '51b668fd5bf7061b7d6fa525f88803e6cfadaa51'))
 181         self.assertEqual(t.name,'signed')
 182         self.assertEqual(t.tagger,'Ali Sabil <ali.sabil@gmail.com>')
 183         self.assertEqual(t.tag_time, 1231203091)
 184         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')
 185
 186     def test_read_commit_from_file(self):
 187         sha = '60dacdc733de308bb77bb76ce0fb0f9b44c9769e'
 188         c = self.commit(sha)
 189         self.assertEqual(c.tree, tree_sha)
 190         self.assertEqual(c.parents, ['0d89f20333fbb1d2f3a94da77f4981373d8f4310'])
 191         self.assertEqual(c.author,
 192             'James Westby <jw+debian@jameswestby.net>')
 193         self.assertEqual(c.committer,
 194             'James Westby <jw+debian@jameswestby.net>')
 195         self.assertEqual(c.commit_time, 1174759230)
 196         self.assertEqual(c.commit_timezone, 0)
 197         self.assertEqual(c.author_timezone, 0)
 198         self.assertEqual(c.message, 'Test commit\n')
 199
 200     def test_read_commit_no_parents(self):
 201         sha = '0d89f20333fbb1d2f3a94da77f4981373d8f4310'
 202         c = self.commit(sha)
 203         self.assertEqual(c.tree, '90182552c4a85a45ec2a835cadc3451bebdfe870')
 204         self.assertEqual(c.parents, [])
 205         self.assertEqual(c.author,
 206             'James Westby <jw+debian@jameswestby.net>')
 207         self.assertEqual(c.committer,
 208             'James Westby <jw+debian@jameswestby.net>')
 209         self.assertEqual(c.commit_time, 1174758034)
 210         self.assertEqual(c.commit_timezone, 0)
 211         self.assertEqual(c.author_timezone, 0)
 212         self.assertEqual(c.message, 'Test commit\n')
 213
 214     def test_read_commit_two_parents(self):
 215         sha = '5dac377bdded4c9aeb8dff595f0faeebcc8498cc'
 216         c = self.commit(sha)
 217         self.assertEqual(c.tree, 'd80c186a03f423a81b39df39dc87fd269736ca86')
 218         self.assertEqual(c.parents, ['ab64bbdcc51b170d21588e5c5d391ee5c0c96dfd',
 219                                        '4cffe90e0a41ad3f5190079d7c8f036bde29cbe6'])
 220         self.assertEqual(c.author,
 221             'James Westby <jw+debian@jameswestby.net>')
 222         self.assertEqual(c.committer,
 223             'James Westby <jw+debian@jameswestby.net>')
 224         self.assertEqual(c.commit_time, 1174773719)
 225         self.assertEqual(c.commit_timezone, 0)
 226         self.assertEqual(c.author_timezone, 0)
 227         self.assertEqual(c.message, 'Merge ../b\n')
 228
 229     def test_check_id(self):
 230         wrong_sha = '1' * 40
 231         b = self.get_blob(wrong_sha)
 232         self.assertEqual(wrong_sha, b.id)
 233         self.assertRaises(ChecksumMismatch, b.check)
 234         self.assertEqual('742b386350576589175e374a5706505cbd17680c', b.id)
 235
 236
 237 class ShaFileCheckTests(unittest.TestCase):
 238
 239     def assertCheckFails(self, cls, data):
 240         obj = cls()
 241         def do_check():
 242             obj.set_raw_string(data)
 243             obj.check()
 244         self.assertRaises(ObjectFormatException, do_check)
 245
 246     def assertCheckSucceeds(self, cls, data):
 247         obj = cls()
 248         obj.set_raw_string(data)
 249         self.assertEqual(None, obj.check())
 250
 251
 252 class CommitSerializationTests(unittest.TestCase):
 253
 254     def make_commit(self, **kwargs):
 255         attrs = {'tree': 'd80c186a03f423a81b39df39dc87fd269736ca86',
 256                  'parents': ['ab64bbdcc51b170d21588e5c5d391ee5c0c96dfd',
 257                              '4cffe90e0a41ad3f5190079d7c8f036bde29cbe6'],
 258                  'author': 'James Westby <jw+debian@jameswestby.net>',
 259                  'committer': 'James Westby <jw+debian@jameswestby.net>',
 260                  'commit_time': 1174773719,
 261                  'author_time': 1174773719,
 262                  'commit_timezone': 0,
 263                  'author_timezone': 0,
 264                  'message':  'Merge ../b\n'}
 265         attrs.update(kwargs)
 266         return make_commit(**attrs)
 267
 268     def test_encoding(self):
 269         c = self.make_commit(encoding='iso8859-1')
 270         self.assertTrue('encoding iso8859-1\n' in c.as_raw_string())
 271
 272     def test_short_timestamp(self):
 273         c = self.make_commit(commit_time=30)
 274         c1 = Commit()
 275         c1.set_raw_string(c.as_raw_string())
 276         self.assertEquals(30, c1.commit_time)
 277
 278     def test_raw_length(self):
 279         c = self.make_commit()
 280         self.assertEquals(len(c.as_raw_string()), c.raw_length())
 281
 282     def test_simple(self):
 283         c = self.make_commit()
 284         self.assertEquals(c.id, '5dac377bdded4c9aeb8dff595f0faeebcc8498cc')
 285         self.assertEquals(
 286                 'tree d80c186a03f423a81b39df39dc87fd269736ca86\n'
 287                 'parent ab64bbdcc51b170d21588e5c5d391ee5c0c96dfd\n'
 288                 'parent 4cffe90e0a41ad3f5190079d7c8f036bde29cbe6\n'
 289                 'author James Westby <jw+debian@jameswestby.net> '
 290                 '1174773719 +0000\n'
 291                 'committer James Westby <jw+debian@jameswestby.net> '
 292                 '1174773719 +0000\n'
 293                 '\n'
 294                 'Merge ../b\n', c.as_raw_string())
 295
 296     def test_timezone(self):
 297         c = self.make_commit(commit_timezone=(5 * 60))
 298         self.assertTrue(" +0005\n" in c.as_raw_string())
 299
 300     def test_neg_timezone(self):
 301         c = self.make_commit(commit_timezone=(-1 * 3600))
 302         self.assertTrue(" -0100\n" in c.as_raw_string())
 303
 304
 305 default_committer = 'James Westby <jw+debian@jameswestby.net> 1174773719 +0000'
 306
 307 class CommitParseTests(ShaFileCheckTests):
 308
 309     def make_commit_lines(self,
 310                           tree='d80c186a03f423a81b39df39dc87fd269736ca86',
 311                           parents=['ab64bbdcc51b170d21588e5c5d391ee5c0c96dfd',
 312                                    '4cffe90e0a41ad3f5190079d7c8f036bde29cbe6'],
 313                           author=default_committer,
 314                           committer=default_committer,
 315                           encoding=None,
 316                           message='Merge ../b\n',
 317                           extra=None):
 318         lines = []
 319         if tree is not None:
 320             lines.append('tree %s' % tree)
 321         if parents is not None:
 322             lines.extend('parent %s' % p for p in parents)
 323         if author is not None:
 324             lines.append('author %s' % author)
 325         if committer is not None:
 326             lines.append('committer %s' % committer)
 327         if encoding is not None:
 328             lines.append('encoding %s' % encoding)
 329         if extra is not None:
 330             for name, value in sorted(extra.iteritems()):
 331                 lines.append('%s %s' % (name, value))
 332         lines.append('')
 333         if message is not None:
 334             lines.append(message)
 335         return lines
 336
 337     def make_commit_text(self, **kwargs):
 338         return '\n'.join(self.make_commit_lines(**kwargs))
 339
 340     def test_simple(self):
 341         c = Commit.from_string(self.make_commit_text())
 342         self.assertEquals('Merge ../b\n', c.message)
 343         self.assertEquals('James Westby <jw+debian@jameswestby.net>', c.author)
 344         self.assertEquals('James Westby <jw+debian@jameswestby.net>',
 345                           c.committer)
 346         self.assertEquals('d80c186a03f423a81b39df39dc87fd269736ca86', c.tree)
 347         self.assertEquals(['ab64bbdcc51b170d21588e5c5d391ee5c0c96dfd',
 348                            '4cffe90e0a41ad3f5190079d7c8f036bde29cbe6'],
 349                           c.parents)
 350         expected_time = datetime.datetime(2007, 3, 24, 22, 1, 59)
 351         self.assertEquals(expected_time,
 352                           datetime.datetime.utcfromtimestamp(c.commit_time))
 353         self.assertEquals(0, c.commit_timezone)
 354         self.assertEquals(expected_time,
 355                           datetime.datetime.utcfromtimestamp(c.author_time))
 356         self.assertEquals(0, c.author_timezone)
 357         self.assertEquals(None, c.encoding)
 358
 359     def test_custom(self):
 360         c = Commit.from_string(self.make_commit_text(
 361           extra={'extra-field': 'data'}))
 362         self.assertEquals([('extra-field', 'data')], c.extra)
 363
 364     def test_encoding(self):
 365         c = Commit.from_string(self.make_commit_text(encoding='UTF-8'))
 366         self.assertEquals('UTF-8', c.encoding)
 367
 368     def test_check(self):
 369         self.assertCheckSucceeds(Commit, self.make_commit_text())
 370         self.assertCheckSucceeds(Commit, self.make_commit_text(parents=None))
 371         self.assertCheckSucceeds(Commit,
 372                                  self.make_commit_text(encoding='UTF-8'))
 373
 374         self.assertCheckFails(Commit, self.make_commit_text(tree='xxx'))
 375         self.assertCheckFails(Commit, self.make_commit_text(
 376           parents=[a_sha, 'xxx']))
 377         bad_committer = "some guy without an email address 1174773719 +0000"
 378         self.assertCheckFails(Commit,
 379                               self.make_commit_text(committer=bad_committer))
 380         self.assertCheckFails(Commit,
 381                               self.make_commit_text(author=bad_committer))
 382         self.assertCheckFails(Commit, self.make_commit_text(author=None))
 383         self.assertCheckFails(Commit, self.make_commit_text(committer=None))
 384         self.assertCheckFails(Commit, self.make_commit_text(
 385           author=None, committer=None))
 386
 387     def test_check_duplicates(self):
 388         # duplicate each of the header fields
 389         for i in xrange(5):
 390             lines = self.make_commit_lines(parents=[a_sha], encoding='UTF-8')
 391             lines.insert(i, lines[i])
 392             text = '\n'.join(lines)
 393             if lines[i].startswith('parent'):
 394                 # duplicate parents are ok for now
 395                 self.assertCheckSucceeds(Commit, text)
 396             else:
 397                 self.assertCheckFails(Commit, text)
 398
 399     def test_check_order(self):
 400         lines = self.make_commit_lines(parents=[a_sha], encoding='UTF-8')
 401         headers = lines[:5]
 402         rest = lines[5:]
 403         # of all possible permutations, ensure only the original succeeds
 404         for perm in permutations(headers):
 405             perm = list(perm)
 406             text = '\n'.join(perm + rest)
 407             if perm == headers:
 408                 self.assertCheckSucceeds(Commit, text)
 409             else:
 410                 self.assertCheckFails(Commit, text)
 411
 412
 413 class TreeTests(ShaFileCheckTests):
 414
 415     def test_simple(self):
 416         myhexsha = "d80c186a03f423a81b39df39dc87fd269736ca86"
 417         x = Tree()
 418         x["myname"] = (0100755, myhexsha)
 419         self.assertEquals('100755 myname\0' + hex_to_sha(myhexsha),
 420                 x.as_raw_string())
 421
 422     def test_tree_dir_sort(self):
 423         x = Tree()
 424         x["a.c"] = (0100755, "d80c186a03f423a81b39df39dc87fd269736ca86")
 425         x["a"] = (stat.S_IFDIR, "d80c186a03f423a81b39df39dc87fd269736ca86")
 426         x["a/c"] = (stat.S_IFDIR, "d80c186a03f423a81b39df39dc87fd269736ca86")
 427         self.assertEquals(["a.c", "a", "a/c"], [p[0] for p in x.iteritems()])
 428
 429     def _do_test_parse_tree(self, parse_tree):
 430         dir = os.path.join(os.path.dirname(__file__), 'data', 'trees')
 431         o = Tree.from_path(hex_to_filename(dir, tree_sha))
 432         self.assertEquals([('a', 0100644, a_sha), ('b', 0100644, b_sha)],
 433                           list(parse_tree(o.as_raw_string())))
 434
 435     def test_parse_tree(self):
 436         self._do_test_parse_tree(_parse_tree_py)
 437
 438     def test_parse_tree_extension(self):
 439         if parse_tree is _parse_tree_py:
 440             raise TestSkipped('parse_tree extension not found')
 441         self._do_test_parse_tree(parse_tree)
 442
 443     def test_check(self):
 444         t = Tree
 445         sha = hex_to_sha(a_sha)
 446
 447         # filenames
 448         self.assertCheckSucceeds(t, '100644 .a\0%s' % sha)
 449         self.assertCheckFails(t, '100644 \0%s' % sha)
 450         self.assertCheckFails(t, '100644 .\0%s' % sha)
 451         self.assertCheckFails(t, '100644 a/a\0%s' % sha)
 452         self.assertCheckFails(t, '100644 ..\0%s' % sha)
 453
 454         # modes
 455         self.assertCheckSucceeds(t, '100644 a\0%s' % sha)
 456         self.assertCheckSucceeds(t, '100755 a\0%s' % sha)
 457         self.assertCheckSucceeds(t, '160000 a\0%s' % sha)
 458         # TODO more whitelisted modes
 459         self.assertCheckFails(t, '123456 a\0%s' % sha)
 460         self.assertCheckFails(t, '123abc a\0%s' % sha)
 461
 462         # shas
 463         self.assertCheckFails(t, '100644 a\0%s' % ('x' * 5))
 464         self.assertCheckFails(t, '100644 a\0%s' % ('x' * 18 + '\0'))
 465         self.assertCheckFails(t, '100644 a\0%s\n100644 b\0%s' % ('x' * 21, sha))
 466
 467         # ordering
 468         sha2 = hex_to_sha(b_sha)
 469         self.assertCheckSucceeds(t, '100644 a\0%s\n100644 b\0%s' % (sha, sha))
 470         self.assertCheckSucceeds(t, '100644 a\0%s\n100644 b\0%s' % (sha, sha2))
 471         self.assertCheckFails(t, '100644 a\0%s\n100755 a\0%s' % (sha, sha2))
 472         self.assertCheckFails(t, '100644 b\0%s\n100644 a\0%s' % (sha2, sha))
 473
 474     def test_iter(self):
 475         t = Tree()
 476         t["foo"] = (0100644, a_sha)
 477         self.assertEquals(set(["foo"]), set(t))
 478
 479
 480 class TagSerializeTests(unittest.TestCase):
 481
 482     def test_serialize_simple(self):
 483         x = make_object(Tag,
 484                         tagger='Jelmer Vernooij <jelmer@samba.org>',
 485                         name='0.1',
 486                         message='Tag 0.1',
 487                         object=(Blob, 'd80c186a03f423a81b39df39dc87fd269736ca86'),
 488                         tag_time=423423423,
 489                         tag_timezone=0)
 490         self.assertEquals(('object d80c186a03f423a81b39df39dc87fd269736ca86\n'
 491                            'type blob\n'
 492                            'tag 0.1\n'
 493                            'tagger Jelmer Vernooij <jelmer@samba.org> '
 494                            '423423423 +0000\n'
 495                            '\n'
 496                            'Tag 0.1'), x.as_raw_string())
 497
 498
 499 default_tagger = ('Linus Torvalds <torvalds@woody.linux-foundation.org> '
 500                   '1183319674 -0700')
 501 default_message = """Linux 2.6.22-rc7
 502 -----BEGIN PGP SIGNATURE-----
 503 Version: GnuPG v1.4.7 (GNU/Linux)
 504
 505 iD8DBQBGiAaAF3YsRnbiHLsRAitMAKCiLboJkQECM/jpYsY3WPfvUgLXkACgg3ql
 506 OK2XeQOiEeXtT76rV4t2WR4=
 507 =ivrA
 508 -----END PGP SIGNATURE-----
 509 """
 510
 511
 512 class TagParseTests(ShaFileCheckTests):
 513     def make_tag_lines(self,
 514                        object_sha="a38d6181ff27824c79fc7df825164a212eff6a3f",
 515                        object_type_name="commit",
 516                        name="v2.6.22-rc7",
 517                        tagger=default_tagger,
 518                        message=default_message):
 519         lines = []
 520         if object_sha is not None:
 521             lines.append("object %s" % object_sha)
 522         if object_type_name is not None:
 523             lines.append("type %s" % object_type_name)
 524         if name is not None:
 525             lines.append("tag %s" % name)
 526         if tagger is not None:
 527             lines.append("tagger %s" % tagger)
 528         lines.append("")
 529         if message is not None:
 530             lines.append(message)
 531         return lines
 532
 533     def make_tag_text(self, **kwargs):
 534         return "\n".join(self.make_tag_lines(**kwargs))
 535
 536     def test_parse(self):
 537         x = Tag()
 538         x.set_raw_string(self.make_tag_text())
 539         self.assertEquals(
 540             "Linus Torvalds <torvalds@woody.linux-foundation.org>", x.tagger)
 541         self.assertEquals("v2.6.22-rc7", x.name)
 542         object_type, object_sha = x.object
 543         self.assertEquals("a38d6181ff27824c79fc7df825164a212eff6a3f",
 544                           object_sha)
 545         self.assertEquals(Commit, object_type)
 546         self.assertEquals(datetime.datetime.utcfromtimestamp(x.tag_time),
 547                           datetime.datetime(2007, 7, 1, 19, 54, 34))
 548         self.assertEquals(-25200, x.tag_timezone)
 549
 550     def test_parse_no_tagger(self):
 551         x = Tag()
 552         x.set_raw_string(self.make_tag_text(tagger=None))
 553         self.assertEquals(None, x.tagger)
 554         self.assertEquals("v2.6.22-rc7", x.name)
 555
 556     def test_check(self):
 557         self.assertCheckSucceeds(Tag, self.make_tag_text())
 558         self.assertCheckFails(Tag, self.make_tag_text(object_sha=None))
 559         self.assertCheckFails(Tag, self.make_tag_text(object_type_name=None))
 560         self.assertCheckFails(Tag, self.make_tag_text(name=None))
 561         self.assertCheckFails(Tag, self.make_tag_text(name=''))
 562         self.assertCheckFails(Tag, self.make_tag_text(
 563           object_type_name="foobar"))
 564         self.assertCheckFails(Tag, self.make_tag_text(
 565           tagger="some guy without an email address 1183319674 -0700"))
 566         self.assertCheckFails(Tag, self.make_tag_text(
 567           tagger=("Linus Torvalds <torvalds@woody.linux-foundation.org> "
 568                   "Sun 7 Jul 2007 12:54:34 +0700")))
 569         self.assertCheckFails(Tag, self.make_tag_text(object_sha="xxx"))
 570
 571     def test_check_duplicates(self):
 572         # duplicate each of the header fields
 573         for i in xrange(4):
 574             lines = self.make_tag_lines()
 575             lines.insert(i, lines[i])
 576             self.assertCheckFails(Tag, '\n'.join(lines))
 577
 578     def test_check_order(self):
 579         lines = self.make_tag_lines()
 580         headers = lines[:4]
 581         rest = lines[4:]
 582         # of all possible permutations, ensure only the original succeeds
 583         for perm in permutations(headers):
 584             perm = list(perm)
 585             text = '\n'.join(perm + rest)
 586             if perm == headers:
 587                 self.assertCheckSucceeds(Tag, text)
 588             else:
 589                 self.assertCheckFails(Tag, text)
 590
 591
 592 class CheckTests(unittest.TestCase):
 593
 594     def test_check_hexsha(self):
 595         check_hexsha(a_sha, "failed to check good sha")
 596         self.assertRaises(ObjectFormatException, check_hexsha, '1' * 39,
 597                           'sha too short')
 598         self.assertRaises(ObjectFormatException, check_hexsha, '1' * 41,
 599                           'sha too long')
 600         self.assertRaises(ObjectFormatException, check_hexsha, 'x' * 40,
 601                           'invalid characters')
 602
 603     def test_check_identity(self):
 604         check_identity("Dave Borowitz <dborowitz@google.com>",
 605                        "failed to check good identity")
 606         check_identity("<dborowitz@google.com>",
 607                        "failed to check good identity")
 608         self.assertRaises(ObjectFormatException, check_identity,
 609                           "Dave Borowitz", "no email")
 610         self.assertRaises(ObjectFormatException, check_identity,
 611                           "Dave Borowitz <dborowitz", "incomplete email")
 612         self.assertRaises(ObjectFormatException, check_identity,
 613                           "dborowitz@google.com>", "incomplete email")
 614         self.assertRaises(ObjectFormatException, check_identity,
 615                           "Dave Borowitz <<dborowitz@google.com>", "typo")
 616         self.assertRaises(ObjectFormatException, check_identity,
 617                           "Dave Borowitz <dborowitz@google.com>>", "typo")
 618         self.assertRaises(ObjectFormatException, check_identity,
 619                           "Dave Borowitz <dborowitz@google.com>xxx",
 620                           "trailing characters")
 621
 622
 623 class TimezoneTests(unittest.TestCase):
 624
 625     def test_parse_timezone_utc(self):
 626         self.assertEquals((0, False), parse_timezone("+0000"))
 627
 628     def test_parse_timezone_utc_negative(self):
 629         self.assertEquals((0, True), parse_timezone("-0000"))
 630
 631     def test_generate_timezone_utc(self):
 632         self.assertEquals("+0000", format_timezone(0))
 633
 634     def test_generate_timezone_utc_negative(self):
 635         self.assertEquals("-0000", format_timezone(0, True))
 636
 637     def test_parse_timezone_cet(self):
 638         self.assertEquals((60 * 60, False), parse_timezone("+0100"))
 639
 640     def test_format_timezone_cet(self):
 641         self.assertEquals("+0100", format_timezone(60 * 60))
 642
 643     def test_format_timezone_pdt(self):
 644         self.assertEquals("-0400", format_timezone(-4 * 60 * 60))
 645
 646     def test_parse_timezone_pdt(self):
 647         self.assertEquals((-4 * 60 * 60, False), parse_timezone("-0400"))
 648
 649     def test_format_timezone_pdt_half(self):
 650         self.assertEquals("-0440",
 651             format_timezone(int(((-4 * 60) - 40) * 60)))
 652
 653     def test_parse_timezone_pdt_half(self):
 654         self.assertEquals((((-4 * 60) - 40) * 60, False),
 655             parse_timezone("-0440"))