src/allmydata/test/test_client.py

   1 import os, sys
   2 from twisted.trial import unittest
   3 from twisted.application import service
   4
   5 import allmydata
   6 from allmydata.node import Node, OldConfigError, OldConfigOptionError, MissingConfigEntry, UnescapedHashError
   7 from allmydata.frontends.auth import NeedRootcapLookupScheme
   8 from allmydata import client
   9 from allmydata.storage_client import StorageFarmBroker
  10 from allmydata.manhole import AuthorizedKeysManhole
  11 from allmydata.util import base32, fileutil
  12 from allmydata.interfaces import IFilesystemNode, IFileNode, \
  13      IImmutableFileNode, IMutableFileNode, IDirectoryNode
  14 from foolscap.api import flushEventualQueue
  15 import allmydata.test.common_util as testutil
  16
  17 import mock
  18
  19 BASECONFIG = ("[client]\n"
  20               "introducer.furl = \n"
  21               )
  22
  23 BASECONFIG_I = ("[client]\n"
  24               "introducer.furl = %s\n"
  25               )
  26
  27 class Basic(testutil.ReallyEqualMixin, unittest.TestCase):
  28     def test_loadable(self):
  29         basedir = "test_client.Basic.test_loadable"
  30         os.mkdir(basedir)
  31         fileutil.write(os.path.join(basedir, "tahoe.cfg"), \
  32                            BASECONFIG)
  33         client.Client(basedir)
  34
  35     def test_comment(self):
  36         should_fail = [r"test#test", r"#testtest", r"test\\#test"]
  37         should_not_fail = [r"test\#test", r"test\\\#test", r"testtest"]
  38
  39         basedir = "test_client.Basic.test_comment"
  40         os.mkdir(basedir)
  41
  42         def write_config(s):
  43             config = ("[client]\n"
  44                       "introducer.furl = %s\n" % s)
  45             fileutil.write(os.path.join(basedir, "tahoe.cfg"), config)
  46
  47         for s in should_fail:
  48             self.failUnless(Node._contains_unescaped_hash(s))
  49             write_config(s)
  50             self.failUnlessRaises(UnescapedHashError, client.Client, basedir)
  51
  52         for s in should_not_fail:
  53             self.failIf(Node._contains_unescaped_hash(s))
  54             write_config(s)
  55             client.Client(basedir)
  56
  57
  58     @mock.patch('twisted.python.log.msg')
  59     def test_error_on_old_config_files(self, mock_log_msg):
  60         basedir = "test_client.Basic.test_error_on_old_config_files"
  61         os.mkdir(basedir)
  62         fileutil.write(os.path.join(basedir, "tahoe.cfg"),
  63                        BASECONFIG +
  64                        "[storage]\n" +
  65                        "enabled = false\n" +
  66                        "reserved_space = bogus\n")
  67         fileutil.write(os.path.join(basedir, "introducer.furl"), "")
  68         fileutil.write(os.path.join(basedir, "no_storage"), "")
  69         fileutil.write(os.path.join(basedir, "readonly_storage"), "")
  70         fileutil.write(os.path.join(basedir, "debug_discard_storage"), "")
  71
  72         e = self.failUnlessRaises(OldConfigError, client.Client, basedir)
  73         abs_basedir = fileutil.abspath_expanduser_unicode(unicode(basedir)).encode(sys.getfilesystemencoding())
  74         self.failUnlessIn(os.path.join(abs_basedir, "introducer.furl"), e.args[0])
  75         self.failUnlessIn(os.path.join(abs_basedir, "no_storage"), e.args[0])
  76         self.failUnlessIn(os.path.join(abs_basedir, "readonly_storage"), e.args[0])
  77         self.failUnlessIn(os.path.join(abs_basedir, "debug_discard_storage"), e.args[0])
  78
  79         for oldfile in ['introducer.furl', 'no_storage', 'readonly_storage',
  80                         'debug_discard_storage']:
  81             logged = [ m for m in mock_log_msg.call_args_list if
  82                        ("Found pre-Tahoe-LAFS-v1.3 configuration file" in str(m[0][0]) and oldfile in str(m[0][0])) ]
  83             self.failUnless(logged, (oldfile, mock_log_msg.call_args_list))
  84
  85         for oldfile in [
  86             'nickname', 'webport', 'keepalive_timeout', 'log_gatherer.furl',
  87             'disconnect_timeout', 'advertised_ip_addresses', 'helper.furl',
  88             'key_generator.furl', 'stats_gatherer.furl', 'sizelimit',
  89             'run_helper']:
  90             logged = [ m for m in mock_log_msg.call_args_list if
  91                        ("Found pre-Tahoe-LAFS-v1.3 configuration file" in str(m[0][0]) and oldfile in str(m[0][0])) ]
  92             self.failIf(logged, oldfile)
  93
  94     def test_secrets(self):
  95         basedir = "test_client.Basic.test_secrets"
  96         os.mkdir(basedir)
  97         fileutil.write(os.path.join(basedir, "tahoe.cfg"), \
  98                            BASECONFIG)
  99         c = client.Client(basedir)
 100         secret_fname = os.path.join(basedir, "private", "secret")
 101         self.failUnless(os.path.exists(secret_fname), secret_fname)
 102         renew_secret = c.get_renewal_secret()
 103         self.failUnless(base32.b2a(renew_secret))
 104         cancel_secret = c.get_cancel_secret()
 105         self.failUnless(base32.b2a(cancel_secret))
 106
 107     def test_nodekey_yes_storage(self):
 108         basedir = "test_client.Basic.test_nodekey_yes_storage"
 109         os.mkdir(basedir)
 110         fileutil.write(os.path.join(basedir, "tahoe.cfg"),
 111                        BASECONFIG)
 112         c = client.Client(basedir)
 113         self.failUnless(c.get_long_nodeid().startswith("v0-"))
 114
 115     def test_nodekey_no_storage(self):
 116         basedir = "test_client.Basic.test_nodekey_no_storage"
 117         os.mkdir(basedir)
 118         fileutil.write(os.path.join(basedir, "tahoe.cfg"),
 119                        BASECONFIG + "[storage]\n" + "enabled = false\n")
 120         c = client.Client(basedir)
 121         self.failUnless(c.get_long_nodeid().startswith("v0-"))
 122
 123     def test_reserved_1(self):
 124         basedir = "client.Basic.test_reserved_1"
 125         os.mkdir(basedir)
 126         fileutil.write(os.path.join(basedir, "tahoe.cfg"), \
 127                            BASECONFIG + \
 128                            "[storage]\n" + \
 129                            "enabled = true\n" + \
 130                            "reserved_space = 1000\n")
 131         c = client.Client(basedir)
 132         self.failUnlessEqual(c.getServiceNamed("storage").reserved_space, 1000)
 133
 134     def test_reserved_2(self):
 135         basedir = "client.Basic.test_reserved_2"
 136         os.mkdir(basedir)
 137         fileutil.write(os.path.join(basedir, "tahoe.cfg"),  \
 138                            BASECONFIG + \
 139                            "[storage]\n" + \
 140                            "enabled = true\n" + \
 141                            "reserved_space = 10K\n")
 142         c = client.Client(basedir)
 143         self.failUnlessEqual(c.getServiceNamed("storage").reserved_space, 10*1000)
 144
 145     def test_reserved_3(self):
 146         basedir = "client.Basic.test_reserved_3"
 147         os.mkdir(basedir)
 148         fileutil.write(os.path.join(basedir, "tahoe.cfg"), \
 149                            BASECONFIG + \
 150                            "[storage]\n" + \
 151                            "enabled = true\n" + \
 152                            "reserved_space = 5mB\n")
 153         c = client.Client(basedir)
 154         self.failUnlessEqual(c.getServiceNamed("storage").reserved_space,
 155                              5*1000*1000)
 156
 157     def test_reserved_4(self):
 158         basedir = "client.Basic.test_reserved_4"
 159         os.mkdir(basedir)
 160         fileutil.write(os.path.join(basedir, "tahoe.cfg"), \
 161                            BASECONFIG + \
 162                            "[storage]\n" + \
 163                            "enabled = true\n" + \
 164                            "reserved_space = 78Gb\n")
 165         c = client.Client(basedir)
 166         self.failUnlessEqual(c.getServiceNamed("storage").reserved_space,
 167                              78*1000*1000*1000)
 168
 169     def test_reserved_bad(self):
 170         basedir = "client.Basic.test_reserved_bad"
 171         os.mkdir(basedir)
 172         fileutil.write(os.path.join(basedir, "tahoe.cfg"), \
 173                            BASECONFIG + \
 174                            "[storage]\n" + \
 175                            "enabled = true\n" + \
 176                            "reserved_space = bogus\n")
 177         self.failUnlessRaises(ValueError, client.Client, basedir)
 178
 179     def test_web_staticdir(self):
 180         basedir = u"client.Basic.test_web_staticdir"
 181         os.mkdir(basedir)
 182         fileutil.write(os.path.join(basedir, "tahoe.cfg"),
 183                        BASECONFIG +
 184                        "[node]\n" +
 185                        "web.port = tcp:0:interface=127.0.0.1\n" +
 186                        "web.static = relative\n")
 187         c = client.Client(basedir)
 188         w = c.getServiceNamed("webish")
 189         abs_basedir = fileutil.abspath_expanduser_unicode(basedir)
 190         expected = fileutil.abspath_expanduser_unicode(u"relative", abs_basedir)
 191         self.failUnlessReallyEqual(w.staticdir, expected)
 192
 193     def test_manhole_keyfile(self):
 194         basedir = u"client.Basic.test_manhole_keyfile"
 195         os.mkdir(basedir)
 196         fileutil.write(os.path.join(basedir, "tahoe.cfg"),
 197                        BASECONFIG +
 198                        "[node]\n" +
 199                        "ssh.port = tcp:0:interface=127.0.0.1\n" +
 200                        "ssh.authorized_keys_file = relative\n")
 201         c = client.Client(basedir)
 202         m = [s for s in c if isinstance(s, AuthorizedKeysManhole)][0]
 203         abs_basedir = fileutil.abspath_expanduser_unicode(basedir)
 204         expected = fileutil.abspath_expanduser_unicode(u"relative", abs_basedir)
 205         self.failUnlessReallyEqual(m.keyfile, expected)
 206
 207     # TODO: also test config options for SFTP.
 208
 209     def test_ftp_auth_keyfile(self):
 210         basedir = u"client.Basic.test_ftp_auth_keyfile"
 211         os.mkdir(basedir)
 212         fileutil.write(os.path.join(basedir, "tahoe.cfg"),
 213                        (BASECONFIG +
 214                         "[ftpd]\n"
 215                         "enabled = true\n"
 216                         "port = tcp:0:interface=127.0.0.1\n"
 217                         "accounts.file = private/accounts\n"))
 218         os.mkdir(os.path.join(basedir, "private"))
 219         fileutil.write(os.path.join(basedir, "private", "accounts"), "\n")
 220         c = client.Client(basedir) # just make sure it can be instantiated
 221         del c
 222
 223     def test_ftp_auth_url(self):
 224         basedir = u"client.Basic.test_ftp_auth_url"
 225         os.mkdir(basedir)
 226         fileutil.write(os.path.join(basedir, "tahoe.cfg"),
 227                        (BASECONFIG +
 228                         "[ftpd]\n"
 229                         "enabled = true\n"
 230                         "port = tcp:0:interface=127.0.0.1\n"
 231                         "accounts.url = http://0.0.0.0/\n"))
 232         c = client.Client(basedir) # just make sure it can be instantiated
 233         del c
 234
 235     def test_ftp_auth_no_accountfile_or_url(self):
 236         basedir = u"client.Basic.test_ftp_auth_no_accountfile_or_url"
 237         os.mkdir(basedir)
 238         fileutil.write(os.path.join(basedir, "tahoe.cfg"),
 239                        (BASECONFIG +
 240                         "[ftpd]\n"
 241                         "enabled = true\n"
 242                         "port = tcp:0:interface=127.0.0.1\n"))
 243         self.failUnlessRaises(NeedRootcapLookupScheme, client.Client, basedir)
 244
 245     def _permute(self, sb, key):
 246         return [ s.get_longname() for s in sb.get_servers_for_psi(key) ]
 247
 248     def test_permute(self):
 249         sb = StorageFarmBroker(None, True)
 250         for k in ["%d" % i for i in range(5)]:
 251             ann = {"anonymous-storage-FURL": "pb://abcde@nowhere/fake",
 252                    "permutation-seed-base32": base32.b2a(k) }
 253             sb.test_add_rref(k, "rref", ann)
 254
 255         self.failUnlessReallyEqual(self._permute(sb, "one"), ['3','1','0','4','2'])
 256         self.failUnlessReallyEqual(self._permute(sb, "two"), ['0','4','2','1','3'])
 257         sb.servers.clear()
 258         self.failUnlessReallyEqual(self._permute(sb, "one"), [])
 259
 260     def test_versions(self):
 261         basedir = "test_client.Basic.test_versions"
 262         os.mkdir(basedir)
 263         fileutil.write(os.path.join(basedir, "tahoe.cfg"), \
 264                            BASECONFIG + \
 265                            "[storage]\n" + \
 266                            "enabled = true\n")
 267         c = client.Client(basedir)
 268         ss = c.getServiceNamed("storage")
 269         verdict = ss.remote_get_version()
 270         self.failUnlessReallyEqual(verdict["application-version"],
 271                                    str(allmydata.__full_version__))
 272         self.failIfEqual(str(allmydata.__version__), "unknown")
 273         self.failUnless("." in str(allmydata.__full_version__),
 274                         "non-numeric version in '%s'" % allmydata.__version__)
 275         all_versions = allmydata.get_package_versions_string()
 276         self.failUnless(allmydata.__appname__ in all_versions)
 277         # also test stats
 278         stats = c.get_stats()
 279         self.failUnless("node.uptime" in stats)
 280         self.failUnless(isinstance(stats["node.uptime"], float))
 281
 282     def test_helper_furl(self):
 283         basedir = "test_client.Basic.test_helper_furl"
 284         os.mkdir(basedir)
 285
 286         def _check(config, expected_furl):
 287             fileutil.write(os.path.join(basedir, "tahoe.cfg"),
 288                            BASECONFIG + config)
 289             c = client.Client(basedir)
 290             uploader = c.getServiceNamed("uploader")
 291             furl, connected = uploader.get_helper_info()
 292             self.failUnlessEqual(furl, expected_furl)
 293
 294         _check("", None)
 295         _check("helper.furl =\n", None)
 296         _check("helper.furl = \n", None)
 297         _check("helper.furl = None", None)
 298         _check("helper.furl = pb://blah\n", "pb://blah")
 299
 300     @mock.patch('allmydata.util.log.msg')
 301     @mock.patch('allmydata.frontends.drop_upload.DropUploader')
 302     def test_create_drop_uploader(self, mock_drop_uploader, mock_log_msg):
 303         class MockDropUploader(service.MultiService):
 304             name = 'drop-upload'
 305
 306             def __init__(self, client, upload_dircap, local_dir_utf8, inotify=None):
 307                 service.MultiService.__init__(self)
 308                 self.client = client
 309                 self.upload_dircap = upload_dircap
 310                 self.local_dir_utf8 = local_dir_utf8
 311                 self.inotify = inotify
 312
 313         mock_drop_uploader.side_effect = MockDropUploader
 314
 315         upload_dircap = "URI:DIR2:blah"
 316         local_dir_utf8 = u"loc\u0101l_dir".encode('utf-8')
 317         config = (BASECONFIG +
 318                   "[storage]\n" +
 319                   "enabled = false\n" +
 320                   "[drop_upload]\n" +
 321                   "enabled = true\n")
 322
 323         basedir1 = "test_client.Basic.test_create_drop_uploader1"
 324         os.mkdir(basedir1)
 325         fileutil.write(os.path.join(basedir1, "tahoe.cfg"),
 326                        config + "local.directory = " + local_dir_utf8 + "\n")
 327         self.failUnlessRaises(MissingConfigEntry, client.Client, basedir1)
 328
 329         fileutil.write(os.path.join(basedir1, "tahoe.cfg"), config)
 330         fileutil.write(os.path.join(basedir1, "private", "drop_upload_dircap"), "URI:DIR2:blah")
 331         self.failUnlessRaises(MissingConfigEntry, client.Client, basedir1)
 332
 333         fileutil.write(os.path.join(basedir1, "tahoe.cfg"),
 334                        config + "upload.dircap = " + upload_dircap + "\n")
 335         self.failUnlessRaises(OldConfigOptionError, client.Client, basedir1)
 336
 337         fileutil.write(os.path.join(basedir1, "tahoe.cfg"),
 338                        config + "local.directory = " + local_dir_utf8 + "\n")
 339         c1 = client.Client(basedir1)
 340         uploader = c1.getServiceNamed('drop-upload')
 341         self.failUnless(isinstance(uploader, MockDropUploader), uploader)
 342         self.failUnlessReallyEqual(uploader.client, c1)
 343         self.failUnlessReallyEqual(uploader.upload_dircap, upload_dircap)
 344         self.failUnlessReallyEqual(uploader.local_dir_utf8, local_dir_utf8)
 345         self.failUnless(uploader.inotify is None, uploader.inotify)
 346         self.failUnless(uploader.running)
 347
 348         class Boom(Exception):
 349             pass
 350         mock_drop_uploader.side_effect = Boom()
 351
 352         basedir2 = "test_client.Basic.test_create_drop_uploader2"
 353         os.mkdir(basedir2)
 354         os.mkdir(os.path.join(basedir2, "private"))
 355         fileutil.write(os.path.join(basedir2, "tahoe.cfg"),
 356                        BASECONFIG +
 357                        "[drop_upload]\n" +
 358                        "enabled = true\n" +
 359                        "local.directory = " + local_dir_utf8 + "\n")
 360         fileutil.write(os.path.join(basedir2, "private", "drop_upload_dircap"), "URI:DIR2:blah")
 361         c2 = client.Client(basedir2)
 362         self.failUnlessRaises(KeyError, c2.getServiceNamed, 'drop-upload')
 363         self.failUnless([True for arg in mock_log_msg.call_args_list if "Boom" in repr(arg)],
 364                         mock_log_msg.call_args_list)
 365
 366
 367 def flush_but_dont_ignore(res):
 368     d = flushEventualQueue()
 369     def _done(ignored):
 370         return res
 371     d.addCallback(_done)
 372     return d
 373
 374 class Run(unittest.TestCase, testutil.StallMixin):
 375
 376     def setUp(self):
 377         self.sparent = service.MultiService()
 378         self.sparent.startService()
 379     def tearDown(self):
 380         d = self.sparent.stopService()
 381         d.addBoth(flush_but_dont_ignore)
 382         return d
 383
 384     def test_loadable(self):
 385         basedir = "test_client.Run.test_loadable"
 386         os.mkdir(basedir)
 387         dummy = "pb://wl74cyahejagspqgy4x5ukrvfnevlknt@127.0.0.1:58889/bogus"
 388         fileutil.write(os.path.join(basedir, "tahoe.cfg"), BASECONFIG_I % dummy)
 389         fileutil.write(os.path.join(basedir, client.Client.EXIT_TRIGGER_FILE), "")
 390         client.Client(basedir)
 391
 392     def test_reloadable(self):
 393         basedir = "test_client.Run.test_reloadable"
 394         os.mkdir(basedir)
 395         dummy = "pb://wl74cyahejagspqgy4x5ukrvfnevlknt@127.0.0.1:58889/bogus"
 396         fileutil.write(os.path.join(basedir, "tahoe.cfg"), BASECONFIG_I % dummy)
 397         c1 = client.Client(basedir)
 398         c1.setServiceParent(self.sparent)
 399
 400         # delay to let the service start up completely. I'm not entirely sure
 401         # this is necessary.
 402         d = self.stall(delay=2.0)
 403         d.addCallback(lambda res: c1.disownServiceParent())
 404         # the cygwin buildslave seems to need more time to let the old
 405         # service completely shut down. When delay=0.1, I saw this test fail,
 406         # probably due to the logport trying to reclaim the old socket
 407         # number. This suggests that either we're dropping a Deferred
 408         # somewhere in the shutdown sequence, or that cygwin is just cranky.
 409         d.addCallback(self.stall, delay=2.0)
 410         def _restart(res):
 411             # TODO: pause for slightly over one second, to let
 412             # Client._check_exit_trigger poll the file once. That will exercise
 413             # another few lines. Then add another test in which we don't
 414             # update the file at all, and watch to see the node shutdown.
 415             # (To do this, use a modified node which overrides Node.shutdown(),
 416             # also change _check_exit_trigger to use it instead of a raw
 417             # reactor.stop, also instrument the shutdown event in an
 418             # attribute that we can check.)
 419             c2 = client.Client(basedir)
 420             c2.setServiceParent(self.sparent)
 421             return c2.disownServiceParent()
 422         d.addCallback(_restart)
 423         return d
 424
 425 class NodeMaker(testutil.ReallyEqualMixin, unittest.TestCase):
 426     def test_maker(self):
 427         basedir = "client/NodeMaker/maker"
 428         fileutil.make_dirs(basedir)
 429         fileutil.write(os.path.join(basedir, "tahoe.cfg"), BASECONFIG)
 430         c = client.Client(basedir)
 431
 432         n = c.create_node_from_uri("URI:CHK:6nmrpsubgbe57udnexlkiwzmlu:bjt7j6hshrlmadjyr7otq3dc24end5meo5xcr5xe5r663po6itmq:3:10:7277")
 433         self.failUnless(IFilesystemNode.providedBy(n))
 434         self.failUnless(IFileNode.providedBy(n))
 435         self.failUnless(IImmutableFileNode.providedBy(n))
 436         self.failIf(IMutableFileNode.providedBy(n))
 437         self.failIf(IDirectoryNode.providedBy(n))
 438         self.failUnless(n.is_readonly())
 439         self.failIf(n.is_mutable())
 440
 441         # Testing #1679. There was a bug that would occur when downloader was
 442         # downloading the same readcap more than once concurrently, so the
 443         # filenode object was cached, and there was a failure from one of the
 444         # servers in one of the download attempts. No subsequent download
 445         # attempt would attempt to use that server again, which would lead to
 446         # the file being undownloadable until the gateway was restarted. The
 447         # current fix for this (hopefully to be superceded by a better fix
 448         # eventually) is to prevent re-use of filenodes, so the NodeMaker is
 449         # hereby required *not* to cache and re-use filenodes for CHKs.
 450         other_n = c.create_node_from_uri("URI:CHK:6nmrpsubgbe57udnexlkiwzmlu:bjt7j6hshrlmadjyr7otq3dc24end5meo5xcr5xe5r663po6itmq:3:10:7277")
 451         self.failIf(n is other_n, (n, other_n))
 452
 453         n = c.create_node_from_uri("URI:LIT:n5xgk")
 454         self.failUnless(IFilesystemNode.providedBy(n))
 455         self.failUnless(IFileNode.providedBy(n))
 456         self.failUnless(IImmutableFileNode.providedBy(n))
 457         self.failIf(IMutableFileNode.providedBy(n))
 458         self.failIf(IDirectoryNode.providedBy(n))
 459         self.failUnless(n.is_readonly())
 460         self.failIf(n.is_mutable())
 461
 462         n = c.create_node_from_uri("URI:SSK:n6x24zd3seu725yluj75q5boaa:mm6yoqjhl6ueh7iereldqxue4nene4wl7rqfjfybqrehdqmqskvq")
 463         self.failUnless(IFilesystemNode.providedBy(n))
 464         self.failUnless(IFileNode.providedBy(n))
 465         self.failIf(IImmutableFileNode.providedBy(n))
 466         self.failUnless(IMutableFileNode.providedBy(n))
 467         self.failIf(IDirectoryNode.providedBy(n))
 468         self.failIf(n.is_readonly())
 469         self.failUnless(n.is_mutable())
 470
 471         n = c.create_node_from_uri("URI:SSK-RO:b7sr5qsifnicca7cbk3rhrhbvq:mm6yoqjhl6ueh7iereldqxue4nene4wl7rqfjfybqrehdqmqskvq")
 472         self.failUnless(IFilesystemNode.providedBy(n))
 473         self.failUnless(IFileNode.providedBy(n))
 474         self.failIf(IImmutableFileNode.providedBy(n))
 475         self.failUnless(IMutableFileNode.providedBy(n))
 476         self.failIf(IDirectoryNode.providedBy(n))
 477         self.failUnless(n.is_readonly())
 478         self.failUnless(n.is_mutable())
 479
 480         n = c.create_node_from_uri("URI:DIR2:n6x24zd3seu725yluj75q5boaa:mm6yoqjhl6ueh7iereldqxue4nene4wl7rqfjfybqrehdqmqskvq")
 481         self.failUnless(IFilesystemNode.providedBy(n))
 482         self.failIf(IFileNode.providedBy(n))
 483         self.failIf(IImmutableFileNode.providedBy(n))
 484         self.failIf(IMutableFileNode.providedBy(n))
 485         self.failUnless(IDirectoryNode.providedBy(n))
 486         self.failIf(n.is_readonly())
 487         self.failUnless(n.is_mutable())
 488
 489         n = c.create_node_from_uri("URI:DIR2-RO:b7sr5qsifnicca7cbk3rhrhbvq:mm6yoqjhl6ueh7iereldqxue4nene4wl7rqfjfybqrehdqmqskvq")
 490         self.failUnless(IFilesystemNode.providedBy(n))
 491         self.failIf(IFileNode.providedBy(n))
 492         self.failIf(IImmutableFileNode.providedBy(n))
 493         self.failIf(IMutableFileNode.providedBy(n))
 494         self.failUnless(IDirectoryNode.providedBy(n))
 495         self.failUnless(n.is_readonly())
 496         self.failUnless(n.is_mutable())
 497
 498         unknown_rw = "lafs://from_the_future"
 499         unknown_ro = "lafs://readonly_from_the_future"
 500         n = c.create_node_from_uri(unknown_rw, unknown_ro)
 501         self.failUnless(IFilesystemNode.providedBy(n))
 502         self.failIf(IFileNode.providedBy(n))
 503         self.failIf(IImmutableFileNode.providedBy(n))
 504         self.failIf(IMutableFileNode.providedBy(n))
 505         self.failIf(IDirectoryNode.providedBy(n))
 506         self.failUnless(n.is_unknown())
 507         self.failUnlessReallyEqual(n.get_uri(), unknown_rw)
 508         self.failUnlessReallyEqual(n.get_write_uri(), unknown_rw)
 509         self.failUnlessReallyEqual(n.get_readonly_uri(), "ro." + unknown_ro)
 510
 511         # Note: it isn't that we *intend* to deploy non-ASCII caps in
 512         # the future, it is that we want to make sure older Tahoe-LAFS
 513         # versions wouldn't choke on them if we were to do so. See
 514         # #1051 and wiki:NewCapDesign for details.
 515         unknown_rw = u"lafs://from_the_future_rw_\u263A".encode('utf-8')
 516         unknown_ro = u"lafs://readonly_from_the_future_ro_\u263A".encode('utf-8')
 517         n = c.create_node_from_uri(unknown_rw, unknown_ro)
 518         self.failUnless(IFilesystemNode.providedBy(n))
 519         self.failIf(IFileNode.providedBy(n))
 520         self.failIf(IImmutableFileNode.providedBy(n))
 521         self.failIf(IMutableFileNode.providedBy(n))
 522         self.failIf(IDirectoryNode.providedBy(n))
 523         self.failUnless(n.is_unknown())
 524         self.failUnlessReallyEqual(n.get_uri(), unknown_rw)
 525         self.failUnlessReallyEqual(n.get_write_uri(), unknown_rw)
 526         self.failUnlessReallyEqual(n.get_readonly_uri(), "ro." + unknown_ro)