src/allmydata/test/test_client.py

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