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     ObjectFormatException,
  33     )
  34 from dulwich.objects import (
  35     Blob,
  36     Tree,
  37     Commit,
  38     Tag,
  39     format_timezone,
  40     hex_to_sha,
  41     check_hexsha,
  42     check_identity,
  43     parse_timezone,
  44     parse_tree,
  45     _parse_tree_py,
  46     )
  47 from dulwich.tests import (
  48     TestSkipped,
  49     )
  50
  51 a_sha = '6f670c0fb53f9463760b7295fbb814e965fb20c8'
  52 b_sha = '2969be3e8ee1c0222396a5611407e4769f14e54b'
  53 c_sha = '954a536f7819d40e6f637f849ee187dd10066349'
  54 tree_sha = '70c190eb48fa8bbb50ddc692a17b44cb781af7f6'
  55 tag_sha = '71033db03a03c6a36721efcf1968dd8f8e0cf023'
  56
  57 class BlobReadTests(unittest.TestCase):
  58     """Test decompression of blobs"""
  59
  60     def get_sha_file(self, obj, base, sha):
  61         return obj.from_file(os.path.join(os.path.dirname(__file__),
  62                                           'data', base, sha))
  63
  64     def get_blob(self, sha):
  65         """Return the blob named sha from the test data dir"""
  66         return self.get_sha_file(Blob, 'blobs', sha)
  67
  68     def get_tree(self, sha):
  69         return self.get_sha_file(Tree, 'trees', sha)
  70
  71     def get_tag(self, sha):
  72         return self.get_sha_file(Tag, 'tags', sha)
  73
  74     def commit(self, sha):
  75         return self.get_sha_file(Commit, 'commits', sha)
  76
  77     def test_decompress_simple_blob(self):
  78         b = self.get_blob(a_sha)
  79         self.assertEqual(b.data, 'test 1\n')
  80         self.assertEqual(b.sha().hexdigest(), a_sha)
  81
  82     def test_hash(self):
  83         b = self.get_blob(a_sha)
  84         self.assertEqual(hash(b.id), hash(b))
  85
  86     def test_parse_empty_blob_object(self):
  87         sha = 'e69de29bb2d1d6434b8b29ae775ad8c2e48c5391'
  88         b = self.get_blob(sha)
  89         self.assertEqual(b.data, '')
  90         self.assertEqual(b.id, sha)
  91         self.assertEqual(b.sha().hexdigest(), sha)
  92
  93     def test_create_blob_from_string(self):
  94         string = 'test 2\n'
  95         b = Blob.from_string(string)
  96         self.assertEqual(b.data, string)
  97         self.assertEqual(b.sha().hexdigest(), b_sha)
  98
  99     def test_chunks(self):
 100         string = 'test 5\n'
 101         b = Blob.from_string(string)
 102         self.assertEqual([string], b.chunked)
 103
 104     def test_set_chunks(self):
 105         b = Blob()
 106         b.chunked = ['te', 'st', ' 5\n']
 107         self.assertEqual('test 5\n', b.data)
 108         b.chunked = ['te', 'st', ' 6\n']
 109         self.assertEqual('test 6\n', b.as_raw_string())
 110
 111     def test_parse_legacy_blob(self):
 112         string = 'test 3\n'
 113         b = self.get_blob(c_sha)
 114         self.assertEqual(b.data, string)
 115         self.assertEqual(b.sha().hexdigest(), c_sha)
 116
 117     def test_eq(self):
 118         blob1 = self.get_blob(a_sha)
 119         blob2 = self.get_blob(a_sha)
 120         self.assertEqual(blob1, blob2)
 121
 122     def test_read_tree_from_file(self):
 123         t = self.get_tree(tree_sha)
 124         self.assertEqual(t.entries()[0], (33188, 'a', a_sha))
 125         self.assertEqual(t.entries()[1], (33188, 'b', b_sha))
 126
 127     def test_read_tag_from_file(self):
 128         t = self.get_tag(tag_sha)
 129         self.assertEqual(t.object, (Commit, '51b668fd5bf7061b7d6fa525f88803e6cfadaa51'))
 130         self.assertEqual(t.name,'signed')
 131         self.assertEqual(t.tagger,'Ali Sabil <ali.sabil@gmail.com>')
 132         self.assertEqual(t.tag_time, 1231203091)
 133         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')
 134
 135
 136     def test_read_commit_from_file(self):
 137         sha = '60dacdc733de308bb77bb76ce0fb0f9b44c9769e'
 138         c = self.commit(sha)
 139         self.assertEqual(c.tree, tree_sha)
 140         self.assertEqual(c.parents, ['0d89f20333fbb1d2f3a94da77f4981373d8f4310'])
 141         self.assertEqual(c.author,
 142             'James Westby <jw+debian@jameswestby.net>')
 143         self.assertEqual(c.committer,
 144             'James Westby <jw+debian@jameswestby.net>')
 145         self.assertEqual(c.commit_time, 1174759230)
 146         self.assertEqual(c.commit_timezone, 0)
 147         self.assertEqual(c.author_timezone, 0)
 148         self.assertEqual(c.message, 'Test commit\n')
 149
 150     def test_read_commit_no_parents(self):
 151         sha = '0d89f20333fbb1d2f3a94da77f4981373d8f4310'
 152         c = self.commit(sha)
 153         self.assertEqual(c.tree, '90182552c4a85a45ec2a835cadc3451bebdfe870')
 154         self.assertEqual(c.parents, [])
 155         self.assertEqual(c.author,
 156             'James Westby <jw+debian@jameswestby.net>')
 157         self.assertEqual(c.committer,
 158             'James Westby <jw+debian@jameswestby.net>')
 159         self.assertEqual(c.commit_time, 1174758034)
 160         self.assertEqual(c.commit_timezone, 0)
 161         self.assertEqual(c.author_timezone, 0)
 162         self.assertEqual(c.message, 'Test commit\n')
 163
 164     def test_read_commit_two_parents(self):
 165         sha = '5dac377bdded4c9aeb8dff595f0faeebcc8498cc'
 166         c = self.commit(sha)
 167         self.assertEqual(c.tree, 'd80c186a03f423a81b39df39dc87fd269736ca86')
 168         self.assertEqual(c.parents, ['ab64bbdcc51b170d21588e5c5d391ee5c0c96dfd',
 169                                        '4cffe90e0a41ad3f5190079d7c8f036bde29cbe6'])
 170         self.assertEqual(c.author,
 171             'James Westby <jw+debian@jameswestby.net>')
 172         self.assertEqual(c.committer,
 173             'James Westby <jw+debian@jameswestby.net>')
 174         self.assertEqual(c.commit_time, 1174773719)
 175         self.assertEqual(c.commit_timezone, 0)
 176         self.assertEqual(c.author_timezone, 0)
 177         self.assertEqual(c.message, 'Merge ../b\n')
 178
 179
 180 class ShaFileCheckTests(unittest.TestCase):
 181
 182     def assertCheckFails(self, obj, data):
 183         obj.set_raw_string(data)
 184         self.assertRaises(ObjectFormatException, obj.check)
 185
 186     def assertCheckSucceeds(self, obj, data):
 187         obj.set_raw_string(data)
 188         try:
 189             obj.check()
 190         except ObjectFormatException, e:
 191             raise
 192             self.fail(e)
 193
 194
 195 class CommitSerializationTests(unittest.TestCase):
 196
 197     def make_base(self):
 198         c = Commit()
 199         c.tree = 'd80c186a03f423a81b39df39dc87fd269736ca86'
 200         c.parents = ['ab64bbdcc51b170d21588e5c5d391ee5c0c96dfd', '4cffe90e0a41ad3f5190079d7c8f036bde29cbe6']
 201         c.author = 'James Westby <jw+debian@jameswestby.net>'
 202         c.committer = 'James Westby <jw+debian@jameswestby.net>'
 203         c.commit_time = 1174773719
 204         c.author_time = 1174773719
 205         c.commit_timezone = 0
 206         c.author_timezone = 0
 207         c.message =  'Merge ../b\n'
 208         return c
 209
 210     def test_encoding(self):
 211         c = self.make_base()
 212         c.encoding = "iso8859-1"
 213         self.assertTrue("encoding iso8859-1\n" in c.as_raw_string())
 214
 215     def test_short_timestamp(self):
 216         c = self.make_base()
 217         c.commit_time = 30
 218         c1 = Commit()
 219         c1.set_raw_string(c.as_raw_string())
 220         self.assertEquals(30, c1.commit_time)
 221
 222     def test_raw_length(self):
 223         c = self.make_base()
 224         self.assertEquals(len(c.as_raw_string()), c.raw_length())
 225
 226     def test_simple(self):
 227         c = self.make_base()
 228         self.assertEquals(c.id, '5dac377bdded4c9aeb8dff595f0faeebcc8498cc')
 229         self.assertEquals(
 230                 'tree d80c186a03f423a81b39df39dc87fd269736ca86\n'
 231                 'parent ab64bbdcc51b170d21588e5c5d391ee5c0c96dfd\n'
 232                 'parent 4cffe90e0a41ad3f5190079d7c8f036bde29cbe6\n'
 233                 'author James Westby <jw+debian@jameswestby.net> 1174773719 +0000\n'
 234                 'committer James Westby <jw+debian@jameswestby.net> 1174773719 +0000\n'
 235                 '\n'
 236                 'Merge ../b\n', c.as_raw_string())
 237
 238     def test_timezone(self):
 239         c = self.make_base()
 240         c.commit_timezone = 5 * 60
 241         self.assertTrue(" +0005\n" in c.as_raw_string())
 242
 243     def test_neg_timezone(self):
 244         c = self.make_base()
 245         c.commit_timezone = -1 * 3600
 246         self.assertTrue(" -0100\n" in c.as_raw_string())
 247
 248
 249 default_committer = 'James Westby <jw+debian@jameswestby.net> 1174773719 +0000'
 250
 251 class CommitParseTests(ShaFileCheckTests):
 252
 253     def make_commit_text(self,
 254                          tree='d80c186a03f423a81b39df39dc87fd269736ca86',
 255                          parents=['ab64bbdcc51b170d21588e5c5d391ee5c0c96dfd',
 256                                   '4cffe90e0a41ad3f5190079d7c8f036bde29cbe6'],
 257                          author=default_committer,
 258                          committer=default_committer,
 259                          encoding=None,
 260                          message='Merge ../b\n',
 261                          extra=None):
 262         lines = []
 263         if tree is not None:
 264             lines.append('tree %s' % tree)
 265         if parents is not None:
 266             lines.extend('parent %s' % p for p in parents)
 267         if author is not None:
 268             lines.append('author %s' % author)
 269         if committer is not None:
 270             lines.append('committer %s' % committer)
 271         if encoding is not None:
 272             lines.append('encoding %s' % encoding)
 273         if extra is not None:
 274             for name, value in sorted(extra.iteritems()):
 275                 lines.append('%s %s' % (name, value))
 276         lines.append('')
 277         if message is not None:
 278             lines.append(message)
 279         return '\n'.join(lines)
 280
 281     def test_simple(self):
 282         c = Commit.from_string(self.make_commit_text())
 283         self.assertEquals('Merge ../b\n', c.message)
 284         self.assertEquals('James Westby <jw+debian@jameswestby.net>', c.author)
 285         self.assertEquals('James Westby <jw+debian@jameswestby.net>',
 286                           c.committer)
 287         self.assertEquals('d80c186a03f423a81b39df39dc87fd269736ca86', c.tree)
 288         self.assertEquals(['ab64bbdcc51b170d21588e5c5d391ee5c0c96dfd',
 289                            '4cffe90e0a41ad3f5190079d7c8f036bde29cbe6'],
 290                           c.parents)
 291         expected_time = datetime.datetime(2007, 3, 24, 23, 1, 59).replace(tzinfo=None)
 292         self.assertEquals(expected_time,
 293                           datetime.datetime.fromtimestamp(c.commit_time))
 294         self.assertEquals(0, c.commit_timezone)
 295         self.assertEquals(expected_time,
 296                           datetime.datetime.fromtimestamp(c.author_time))
 297         self.assertEquals(0, c.author_timezone)
 298         self.assertEquals(None, c.encoding)
 299
 300     def test_custom(self):
 301         c = Commit.from_string(self.make_commit_text(
 302           extra={'extra-field': 'data'}))
 303         self.assertEquals([('extra-field', 'data')], c.extra)
 304
 305     def test_encoding(self):
 306         c = Commit.from_string(self.make_commit_text(encoding='UTF-8'))
 307         self.assertEquals('UTF-8', c.encoding)
 308
 309     def test_check(self):
 310         self.assertCheckSucceeds(Commit(), self.make_commit_text())
 311         self.assertCheckSucceeds(Commit(), self.make_commit_text(parents=None))
 312         self.assertCheckSucceeds(Commit(),
 313                                  self.make_commit_text(encoding='UTF-8'))
 314
 315         self.assertCheckFails(Commit(), self.make_commit_text(tree='xxx'))
 316         self.assertCheckFails(Commit(), self.make_commit_text(
 317           parents=[a_sha, 'xxx']))
 318         bad_committer = "some guy without an email address 1174773719 +0000"
 319         self.assertCheckFails(Commit(),
 320                               self.make_commit_text(committer=bad_committer))
 321         self.assertCheckFails(Commit(),
 322                               self.make_commit_text(author=bad_committer))
 323         self.assertCheckFails(Commit(), self.make_commit_text(author=None))
 324         self.assertCheckFails(Commit(), self.make_commit_text(committer=None))
 325         self.assertCheckFails(Commit(), self.make_commit_text(
 326           author=None, committer=None))
 327
 328
 329 class TreeTests(ShaFileCheckTests):
 330
 331     def test_simple(self):
 332         myhexsha = "d80c186a03f423a81b39df39dc87fd269736ca86"
 333         x = Tree()
 334         x["myname"] = (0100755, myhexsha)
 335         self.assertEquals('100755 myname\0' + hex_to_sha(myhexsha),
 336                 x.as_raw_string())
 337
 338     def test_tree_dir_sort(self):
 339         x = Tree()
 340         x["a.c"] = (0100755, "d80c186a03f423a81b39df39dc87fd269736ca86")
 341         x["a"] = (stat.S_IFDIR, "d80c186a03f423a81b39df39dc87fd269736ca86")
 342         x["a/c"] = (stat.S_IFDIR, "d80c186a03f423a81b39df39dc87fd269736ca86")
 343         self.assertEquals(["a.c", "a", "a/c"], [p[0] for p in x.iteritems()])
 344
 345     def _do_test_parse_tree(self, parse_tree):
 346         o = Tree.from_file(os.path.join(os.path.dirname(__file__), 'data',
 347                                         'trees', tree_sha))
 348         self.assertEquals([('a', 0100644, a_sha), ('b', 0100644, b_sha)],
 349                           list(parse_tree(o.as_raw_string())))
 350
 351     def test_parse_tree(self):
 352         self._do_test_parse_tree(_parse_tree_py)
 353
 354     def test_parse_tree_extension(self):
 355         if parse_tree is _parse_tree_py:
 356             raise TestSkipped('parse_tree extension not found')
 357         self._do_test_parse_tree(parse_tree)
 358
 359     def test_check(self):
 360         t = Tree()
 361         sha = hex_to_sha(a_sha)
 362
 363         # filenames
 364         self.assertCheckSucceeds(t, '100644 .a\0%s' % sha)
 365         self.assertCheckFails(t, '100644 \0%s' % sha)
 366         self.assertCheckFails(t, '100644 .\0%s' % sha)
 367         self.assertCheckFails(t, '100644 a/a\0%s' % sha)
 368         self.assertCheckFails(t, '100644 ..\0%s' % sha)
 369
 370         # modes
 371         self.assertCheckSucceeds(t, '100644 a\0%s' % sha)
 372         self.assertCheckSucceeds(t, '100755 a\0%s' % sha)
 373         self.assertCheckSucceeds(t, '160000 a\0%s' % sha)
 374         # TODO more whitelisted modes
 375         self.assertCheckFails(t, '123456 a\0%s' % sha)
 376         self.assertCheckFails(t, '123abc a\0%s' % sha)
 377
 378         # shas
 379         self.assertCheckFails(t, '100644 a\0%s' % ('x' * 5))
 380         self.assertCheckFails(t, '100644 a\0%s' % ('x' * 18 + '\0'))
 381         self.assertCheckFails(t, '100644 a\0%s\n100644 b\0%s' % ('x' * 21, sha))
 382
 383         # ordering
 384         sha2 = hex_to_sha(b_sha)
 385         self.assertCheckSucceeds(t, '100644 a\0%s\n100644 b\0%s' % (sha, sha))
 386         self.assertCheckSucceeds(t, '100644 a\0%s\n100644 b\0%s' % (sha, sha2))
 387         self.assertCheckFails(t, '100644 a\0%s\n100755 a\0%s' % (sha, sha2))
 388         self.assertCheckFails(t, '100644 b\0%s\n100644 a\0%s' % (sha2, sha))
 389
 390
 391 class TagSerializeTests(unittest.TestCase):
 392
 393     def test_serialize_simple(self):
 394         x = Tag()
 395         x.tagger = "Jelmer Vernooij <jelmer@samba.org>"
 396         x.name = "0.1"
 397         x.message = "Tag 0.1"
 398         x.object = (Blob, "d80c186a03f423a81b39df39dc87fd269736ca86")
 399         x.tag_time = 423423423
 400         x.tag_timezone = 0
 401         self.assertEquals("""object d80c186a03f423a81b39df39dc87fd269736ca86
 402 type blob
 403 tag 0.1
 404 tagger Jelmer Vernooij <jelmer@samba.org> 423423423 +0000
 405
 406 Tag 0.1""", x.as_raw_string())
 407
 408
 409 default_tagger = ('Linus Torvalds <torvalds@woody.linux-foundation.org> '
 410                   '1183319674 -0700')
 411 default_message = """Linux 2.6.22-rc7
 412 -----BEGIN PGP SIGNATURE-----
 413 Version: GnuPG v1.4.7 (GNU/Linux)
 414
 415 iD8DBQBGiAaAF3YsRnbiHLsRAitMAKCiLboJkQECM/jpYsY3WPfvUgLXkACgg3ql
 416 OK2XeQOiEeXtT76rV4t2WR4=
 417 =ivrA
 418 -----END PGP SIGNATURE-----
 419 """
 420
 421
 422 class TagParseTests(ShaFileCheckTests):
 423     def make_tag_text(self,
 424                       object_sha="a38d6181ff27824c79fc7df825164a212eff6a3f",
 425                       object_type_name="commit",
 426                       name="v2.6.22-rc7",
 427                       tagger=default_tagger,
 428                       message=default_message):
 429         lines = []
 430         if object_sha is not None:
 431             lines.append("object %s" % object_sha)
 432         if object_type_name is not None:
 433             lines.append("type %s" % object_type_name)
 434         if name is not None:
 435             lines.append("tag %s" % name)
 436         if tagger is not None:
 437             lines.append("tagger %s" % tagger)
 438         lines.append("")
 439         if message is not None:
 440             lines.append(message)
 441         return "\n".join(lines)
 442
 443     def test_parse(self):
 444         x = Tag()
 445         x.set_raw_string(self.make_tag_text())
 446         self.assertEquals(
 447             "Linus Torvalds <torvalds@woody.linux-foundation.org>", x.tagger)
 448         self.assertEquals("v2.6.22-rc7", x.name)
 449         object_type, object_sha = x.object
 450         self.assertEquals("a38d6181ff27824c79fc7df825164a212eff6a3f",
 451                           object_sha)
 452         self.assertEquals(Commit, object_type)
 453         self.assertEquals(datetime.datetime.fromtimestamp(x.tag_time),
 454                           datetime.datetime(2007, 7, 1, 21, 54, 34, 0).replace(tzinfo=None))
 455         self.assertEquals(-25200, x.tag_timezone)
 456
 457     def test_parse_no_tagger(self):
 458         x = Tag()
 459         x.set_raw_string(self.make_tag_text(tagger=None))
 460         self.assertEquals(None, x.tagger)
 461         self.assertEquals("v2.6.22-rc7", x.name)
 462
 463     def test_check(self):
 464         self.assertCheckSucceeds(Tag(), self.make_tag_text())
 465         self.assertCheckFails(Tag(), self.make_tag_text(object_sha=None))
 466         self.assertCheckFails(Tag(), self.make_tag_text(object_type_name=None))
 467         self.assertCheckFails(Tag(), self.make_tag_text(name=None))
 468         self.assertCheckFails(Tag(), self.make_tag_text(name=''))
 469         self.assertCheckFails(Tag(), self.make_tag_text(
 470           object_type_name="foobar"))
 471         self.assertCheckFails(Tag(), self.make_tag_text(
 472           tagger="some guy without an email address 1183319674 -0700"))
 473         self.assertCheckFails(Tag(), self.make_tag_text(
 474           tagger=("Linus Torvalds <torvalds@woody.linux-foundation.org> "
 475                   "Sun 7 Jul 2007 12:54:34 +0700")))
 476         self.assertCheckFails(Tag(), self.make_tag_text(object_sha="xxx"))
 477
 478
 479 class CheckTests(unittest.TestCase):
 480
 481     def test_check_hexsha(self):
 482         check_hexsha(a_sha, "failed to check good sha")
 483         self.assertRaises(ObjectFormatException, check_hexsha, '1' * 39,
 484                           'sha too short')
 485         self.assertRaises(ObjectFormatException, check_hexsha, '1' * 41,
 486                           'sha too long')
 487         self.assertRaises(ObjectFormatException, check_hexsha, 'x' * 40,
 488                           'invalid characters')
 489
 490     def test_check_identity(self):
 491         check_identity("Dave Borowitz <dborowitz@google.com>",
 492                        "failed to check good identity")
 493         check_identity("<dborowitz@google.com>",
 494                        "failed to check good identity")
 495         self.assertRaises(ObjectFormatException, check_identity,
 496                           "Dave Borowitz", "no email")
 497         self.assertRaises(ObjectFormatException, check_identity,
 498                           "Dave Borowitz <dborowitz", "incomplete email")
 499         self.assertRaises(ObjectFormatException, check_identity,
 500                           "dborowitz@google.com>", "incomplete email")
 501         self.assertRaises(ObjectFormatException, check_identity,
 502                           "Dave Borowitz <<dborowitz@google.com>", "typo")
 503         self.assertRaises(ObjectFormatException, check_identity,
 504                           "Dave Borowitz <dborowitz@google.com>>", "typo")
 505         self.assertRaises(ObjectFormatException, check_identity,
 506                           "Dave Borowitz <dborowitz@google.com>xxx",
 507                           "trailing characters")
 508
 509
 510 class TimezoneTests(unittest.TestCase):
 511
 512     def test_parse_timezone_utc(self):
 513         self.assertEquals(0, parse_timezone("+0000"))
 514
 515     def test_generate_timezone_utc(self):
 516         self.assertEquals("+0000", format_timezone(0))
 517
 518     def test_parse_timezone_cet(self):
 519         self.assertEquals(60 * 60, parse_timezone("+0100"))
 520
 521     def test_format_timezone_cet(self):
 522         self.assertEquals("+0100", format_timezone(60 * 60))
 523
 524     def test_format_timezone_pdt(self):
 525         self.assertEquals("-0400", format_timezone(-4 * 60 * 60))
 526
 527     def test_parse_timezone_pdt(self):
 528         self.assertEquals(-4 * 60 * 60, parse_timezone("-0400"))
 529
 530     def test_format_timezone_pdt_half(self):
 531         self.assertEquals("-0440", format_timezone(int(((-4 * 60) - 40) * 60)))
 532
 533     def test_parse_timezone_pdt_half(self):
 534         self.assertEquals(((-4 * 60) - 40) * 60, parse_timezone("-0440"))