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view src/test/test_plugin_misc_groupblog.py @ 2109:85f3e12e984d

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core (memory/cache): file caching handling, first draft: instead of having file caching handled individually by plugins, a generic module has been added in memory. - Cache can be global or associated to a profile. In the later case, client.cache can be used. - Cache are managed with unique ids (which can be any unique unicode, hash uuid, or something else). - To know if a file is in cache, getFilePath is used: if the file is in cache, its absolute path is returned, else None is returned. - To cache a file, cacheData is used with at list the source of cache (most of time plugin import name), and unique id. The method return file opened in binary writing mode (so cacheData can - and should - be used with "with" statement). - 2 files will be created: a metadata file (named after the unique id), and the actual file. - each file has a end of life time, after it, the cache is invalidated and the file must be requested again.
author Goffi <goffi@goffi.org>
date Thu, 05 Jan 2017 20:23:38 +0100
parents 2daf7b4c6756
children 8b37a62336c3
line wrap: on
line source

#!/usr/bin/env python2
# -*- coding: utf-8 -*-

# SAT: a jabber client
# Copyright (C) 2009-2016 Jérôme Poisson (goffi@goffi.org)
# Copyright (C) 2013-2016 Adrien Cossa (souliane@mailoo.org)

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.

# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.

# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

""" Plugin groupblogs """

from constants import Const as C
from sat.test import helpers, helpers_plugins
from sat.plugins import plugin_misc_groupblog
from sat.plugins import plugin_xep_0060
from sat.plugins import plugin_xep_0277
from sat.plugins import plugin_xep_0163
from sat.plugins import plugin_misc_text_syntaxes
from twisted.internet import defer
from twisted.words.protocols.jabber import jid


NS_PUBSUB = 'http://jabber.org/protocol/pubsub'

DO_NOT_COUNT_COMMENTS = -1

SERVICE = u'pubsub.example.com'
PUBLISHER = u'test@example.org'
OTHER_PUBLISHER = u'other@xmpp.net'
NODE_ID = u'urn:xmpp:groupblog:{publisher}'.format(publisher=PUBLISHER)
OTHER_NODE_ID = u'urn:xmpp:groupblog:{publisher}'.format(publisher=OTHER_PUBLISHER)
ITEM_ID_1 = u'c745a688-9b02-11e3-a1a3-c0143dd4fe51'
COMMENT_ID_1 = u'd745a688-9b02-11e3-a1a3-c0143dd4fe52'
COMMENT_ID_2 = u'e745a688-9b02-11e3-a1a3-c0143dd4fe53'


def COMMENTS_NODE_ID(publisher=PUBLISHER):
    return u'urn:xmpp:comments:_{id}__urn:xmpp:groupblog:{publisher}'.format(id=ITEM_ID_1, publisher=publisher)


def COMMENTS_NODE_URL(publisher=PUBLISHER):
    return u'xmpp:{service}?node={node}'.format(service=SERVICE, id=ITEM_ID_1,
                                                node=COMMENTS_NODE_ID(publisher).replace(':', '%3A').replace('@', '%40'))


def ITEM(publisher=PUBLISHER):
    return u"""
          <item id='{id}' xmlns='{ns}'>
            <entry>
              <title type='text'>The Uses of This World</title>
              <id>{id}</id>
              <updated>2003-12-12T17:47:23Z</updated>
              <published>2003-12-12T17:47:23Z</published>
              <link href='{comments_node_url}' rel='replies' title='comments'/>
              <author>
                <name>{publisher}</name>
              </author>
            </entry>
          </item>
        """.format(ns=NS_PUBSUB, id=ITEM_ID_1, publisher=publisher, comments_node_url=COMMENTS_NODE_URL(publisher))


def COMMENT(id_=COMMENT_ID_1):
    return u"""
          <item id='{id}' xmlns='{ns}'>
            <entry>
              <title type='text'>The Uses of This World</title>
              <id>{id}</id>
              <updated>2003-12-12T17:47:23Z</updated>
              <published>2003-12-12T17:47:23Z</published>
              <author>
                <name>{publisher}</name>
              </author>
            </entry>
          </item>
        """.format(ns=NS_PUBSUB, id=id_, publisher=PUBLISHER)


def ITEM_DATA(id_=ITEM_ID_1, count=0):
    res = {'id': ITEM_ID_1,
           'type': 'main_item',
           'content': 'The Uses of This World',
           'author': PUBLISHER,
           'updated': '1071251243.0',
           'published': '1071251243.0',
           'service': SERVICE,
           'comments': COMMENTS_NODE_URL_1,
           'comments_service': SERVICE,
           'comments_node': COMMENTS_NODE_ID_1}
    if count != DO_NOT_COUNT_COMMENTS:
        res.update({'comments_count': unicode(count)})
    return res


def COMMENT_DATA(id_=COMMENT_ID_1):
    return {'id': id_,
            'type': 'comment',
            'content': 'The Uses of This World',
            'author': PUBLISHER,
            'updated': '1071251243.0',
            'published': '1071251243.0',
            'service': SERVICE,
            'node': COMMENTS_NODE_ID_1,
            'verified_publisher': 'false'}


COMMENTS_NODE_ID_1 = COMMENTS_NODE_ID()
COMMENTS_NODE_ID_2 = COMMENTS_NODE_ID(OTHER_PUBLISHER)
COMMENTS_NODE_URL_1 = COMMENTS_NODE_URL()
COMMENTS_NODE_URL_2 = COMMENTS_NODE_URL(OTHER_PUBLISHER)
ITEM_1 = ITEM()
ITEM_2 = ITEM(OTHER_PUBLISHER)
COMMENT_1 = COMMENT(COMMENT_ID_1)
COMMENT_2 = COMMENT(COMMENT_ID_2)


def ITEM_DATA_1(count=0):
    return ITEM_DATA(count=count)

COMMENT_DATA_1 = COMMENT_DATA()
COMMENT_DATA_2 = COMMENT_DATA(COMMENT_ID_2)


class XEP_groupblogTest(helpers.SatTestCase):

    def setUp(self):
        self.host = helpers.FakeSAT()
        self.host.plugins['XEP-0060'] = plugin_xep_0060.XEP_0060(self.host)
        self.host.plugins['XEP-0163'] = plugin_xep_0163.XEP_0163(self.host)
        reload(plugin_misc_text_syntaxes)  # reload the plugin to avoid conflict error
        self.host.plugins['TEXT-SYNTAXES'] = plugin_misc_text_syntaxes.TextSyntaxes(self.host)
        self.host.plugins['XEP-0277'] = plugin_xep_0277.XEP_0277(self.host)
        self.plugin = plugin_misc_groupblog.GroupBlog(self.host)
        self.plugin._initialise = self._initialise
        self.__initialised = False
        self._initialise(C.PROFILE[0])

    def _initialise(self, profile_key):
        profile = profile_key
        client = self.host.getClient(profile)
        if not self.__initialised:
            client.item_access_pubsub = jid.JID(SERVICE)
            xep_0060 = self.host.plugins['XEP-0060']
            client.pubsub_client = helpers_plugins.FakeSatPubSubClient(self.host, xep_0060)
            client.pubsub_client.parent = client
            self.psclient = client.pubsub_client
            helpers.FakeSAT.getDiscoItems = self.psclient.service_getDiscoItems
            self.__initialised = True
        return defer.succeed((profile, client))

    def _addItem(self, profile, item, parent_node=None):
        client = self.host.getClient(profile)
        client.pubsub_client._addItem(item, parent_node)

    def test_sendGroupBlog(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.items(SERVICE, NODE_ID)
        d.addCallback(lambda items: self.assertEqual(len(items), 0))
        d.addCallback(lambda dummy: self.plugin.sendGroupBlog('PUBLIC', [], 'test', {}, C.PROFILE[0]))
        d.addCallback(lambda dummy: self.psclient.items(SERVICE, NODE_ID))
        return d.addCallback(lambda items: self.assertEqual(len(items), 1))

    def test_deleteGroupBlog(self):
        pub_data = (SERVICE, NODE_ID, ITEM_ID_1)
        self.host.bridge.expectCall('personalEvent', C.JID_STR[0],
                                    "MICROBLOG_DELETE",
                                    {'type': 'main_item', 'id': ITEM_ID_1},
                                    C.PROFILE[0])

        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(lambda dummy: self.plugin.deleteGroupBlog(pub_data, COMMENTS_NODE_URL_1, profile_key=C.PROFILE[0]))
        return d.addCallback(self.assertEqual, None)

    def test_updateGroupBlog(self):
        pub_data = (SERVICE, NODE_ID, ITEM_ID_1)
        new_text = u"silfu23RFWUP)IWNOEIOEFÖ"

        self._initialise(C.PROFILE[0])
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(lambda dummy: self.plugin.updateGroupBlog(pub_data, COMMENTS_NODE_URL_1, new_text, {}, profile_key=C.PROFILE[0]))
        d.addCallback(lambda dummy: self.psclient.items(SERVICE, NODE_ID))
        return d.addCallback(lambda items: self.assertEqual(''.join(items[0].entry.title.children), new_text))

    def test_sendGroupBlogComment(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.items(SERVICE, NODE_ID)
        d.addCallback(lambda items: self.assertEqual(len(items), 0))
        d.addCallback(lambda dummy: self.plugin.sendGroupBlogComment(COMMENTS_NODE_URL_1, 'test', {}, profile_key=C.PROFILE[0]))
        d.addCallback(lambda dummy: self.psclient.items(SERVICE, COMMENTS_NODE_ID_1))
        return d.addCallback(lambda items: self.assertEqual(len(items), 1))

    def test_getGroupBlogs(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(lambda dummy: self.plugin.getGroupBlogs(PUBLISHER, profile_key=C.PROFILE[0]))
        result = ([ITEM_DATA_1()], {'count': '1', 'index': '0', 'first': ITEM_ID_1, 'last': ITEM_ID_1})
        return d.addCallback(self.assertEqual, result)

    def test_getGroupBlogsNoCount(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(lambda dummy: self.plugin.getGroupBlogs(PUBLISHER, count_comments=False, profile_key=C.PROFILE[0]))
        result = ([ITEM_DATA_1(DO_NOT_COUNT_COMMENTS)], {'count': '1', 'index': '0', 'first': ITEM_ID_1, 'last': ITEM_ID_1})
        return d.addCallback(self.assertEqual, result)

    def test_getGroupBlogsWithIDs(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(lambda dummy: self.plugin.getGroupBlogs(PUBLISHER, [ITEM_ID_1], profile_key=C.PROFILE[0]))
        result = ([ITEM_DATA_1()], {'count': '1', 'index': '0', 'first': ITEM_ID_1, 'last': ITEM_ID_1})
        return d.addCallback(self.assertEqual, result)

    def test_getGroupBlogsWithRSM(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(lambda dummy: self.plugin.getGroupBlogs(PUBLISHER, rsm_data={'max_': 1}, profile_key=C.PROFILE[0]))
        result = ([ITEM_DATA_1()], {'count': '1', 'index': '0', 'first': ITEM_ID_1, 'last': ITEM_ID_1})
        return d.addCallback(self.assertEqual, result)

    def test_getGroupBlogsWithComments(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(lambda dummy: self.psclient.publish(SERVICE, COMMENTS_NODE_ID_1, [COMMENT_1]))
        d.addCallback(lambda dummy: self.plugin.getGroupBlogsWithComments(PUBLISHER, [], profile_key=C.PROFILE[0]))
        result = ([(ITEM_DATA_1(1), ([COMMENT_DATA_1],
                                     {'count': '1', 'index': '0', 'first': COMMENT_ID_1, 'last': COMMENT_ID_1}))],
                  {'count': '1', 'index': '0', 'first': ITEM_ID_1, 'last': ITEM_ID_1})
        return d.addCallback(self.assertEqual, result)

    def test_getGroupBlogsWithComments2(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(lambda dummy: self.psclient.publish(SERVICE, COMMENTS_NODE_ID_1, [COMMENT_1, COMMENT_2]))
        d.addCallback(lambda dummy: self.plugin.getGroupBlogsWithComments(PUBLISHER, [], profile_key=C.PROFILE[0]))
        result = ([(ITEM_DATA_1(2), ([COMMENT_DATA_1, COMMENT_DATA_2],
                                     {'count': '2', 'index': '0', 'first': COMMENT_ID_1, 'last': COMMENT_ID_2}))],
                  {'count': '1', 'index': '0', 'first': ITEM_ID_1, 'last': ITEM_ID_1})

        return d.addCallback(self.assertEqual, result)

    def test_getGroupBlogsAtom(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(lambda dummy: self.plugin.getGroupBlogsAtom(PUBLISHER, {'max_': 1}, profile_key=C.PROFILE[0]))

        def cb(atom):
            self.assertIsInstance(atom, unicode)
            self.assertTrue(atom.startswith('<?xml version="1.0" encoding="utf-8"?>'))

        return d.addCallback(cb)

    def test_getMassiveGroupBlogs(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(lambda dummy: self.plugin.getMassiveGroupBlogs('JID', [jid.JID(PUBLISHER)], {'max_': 1}, profile_key=C.PROFILE[0]))
        result = {PUBLISHER: ([ITEM_DATA_1()], {'count': '1', 'index': '0', 'first': ITEM_ID_1, 'last': ITEM_ID_1})}

        def clean(res):
            del self.host.plugins['XEP-0060'].node_cache[C.PROFILE[0] + '@found@' + SERVICE]
            return res

        d.addCallback(clean)
        d.addCallback(self.assertEqual, result)

    def test_getMassiveGroupBlogsWithComments(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(lambda dummy: self.psclient.publish(SERVICE, COMMENTS_NODE_ID_1, [COMMENT_1, COMMENT_2]))
        d.addCallback(lambda dummy: self.plugin.getMassiveGroupBlogs('JID', [jid.JID(PUBLISHER)], {'max_': 1}, profile_key=C.PROFILE[0]))
        result = {PUBLISHER: ([ITEM_DATA_1(2)], {'count': '1', 'index': '0', 'first': ITEM_ID_1, 'last': ITEM_ID_1})}

        def clean(res):
            del self.host.plugins['XEP-0060'].node_cache[C.PROFILE[0] + '@found@' + SERVICE]
            return res

        d.addCallback(clean)
        d.addCallback(self.assertEqual, result)

    def test_getGroupBlogComments(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(lambda dummy: self.psclient.publish(SERVICE, COMMENTS_NODE_ID_1, [COMMENT_1]))
        d.addCallback(lambda dummy: self.plugin.getGroupBlogComments(SERVICE, COMMENTS_NODE_ID_1, {'max_': 1}, profile_key=C.PROFILE[0]))
        result = ([COMMENT_DATA_1], {'count': '1', 'index': '0', 'first': COMMENT_ID_1, 'last': COMMENT_ID_1})
        return d.addCallback(self.assertEqual, result)

    def test_subscribeGroupBlog(self):
        self._initialise(C.PROFILE[0])
        d = self.plugin.subscribeGroupBlog(PUBLISHER, profile_key=C.PROFILE[0])
        return d.addCallback(self.assertEqual, None)

    def test_massiveSubscribeGroupBlogs(self):
        self._initialise(C.PROFILE[0])
        d = self.plugin.massiveSubscribeGroupBlogs('JID', [jid.JID(PUBLISHER)], profile_key=C.PROFILE[0])

        def clean(res):
            del self.host.plugins['XEP-0060'].node_cache[C.PROFILE[0] + '@found@' + SERVICE]
            del self.host.plugins['XEP-0060'].node_cache[C.PROFILE[0] + '@subscriptions@' + SERVICE]
            return res

        d.addCallback(clean)
        return d.addCallback(self.assertEqual, None)

    def test_deleteAllGroupBlogs(self):
        """Delete our main node and associated comments node"""
        self._initialise(C.PROFILE[0])
        self.host.profiles[C.PROFILE[0]].roster.addItem(jid.JID(OTHER_PUBLISHER))
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(lambda dummy: self.psclient.publish(SERVICE, COMMENTS_NODE_ID_1, [COMMENT_1, COMMENT_2]))
        d.addCallback(lambda dummy: self.psclient.items(SERVICE, NODE_ID))
        d.addCallback(lambda items: self.assertEqual(len(items), 1))
        d.addCallback(lambda dummy: self.psclient.items(SERVICE, COMMENTS_NODE_ID_1))
        d.addCallback(lambda items: self.assertEqual(len(items), 2))

        d.addCallback(lambda dummy: self.psclient.publish(SERVICE, OTHER_NODE_ID, [ITEM_2]))
        d.addCallback(lambda dummy: self.psclient.publish(SERVICE, COMMENTS_NODE_ID_2, [COMMENT_1, COMMENT_2]))
        d.addCallback(lambda dummy: self.psclient.items(SERVICE, OTHER_NODE_ID))
        d.addCallback(lambda items: self.assertEqual(len(items), 1))
        d.addCallback(lambda dummy: self.psclient.items(SERVICE, COMMENTS_NODE_ID_2))
        d.addCallback(lambda items: self.assertEqual(len(items), 2))

        def clean(res):
            del self.host.plugins['XEP-0060'].node_cache[C.PROFILE[0] + '@found@' + SERVICE]
            return res

        d.addCallback(lambda dummy: self.plugin.deleteAllGroupBlogs(C.PROFILE[0]))
        d.addCallback(clean)

        d.addCallback(lambda dummy: self.psclient.items(SERVICE, NODE_ID))
        d.addCallback(lambda items: self.assertEqual(len(items), 0))
        d.addCallback(lambda dummy: self.psclient.items(SERVICE, COMMENTS_NODE_ID_1))
        d.addCallback(lambda items: self.assertEqual(len(items), 0))

        d.addCallback(lambda dummy: self.psclient.items(SERVICE, OTHER_NODE_ID))
        d.addCallback(lambda items: self.assertEqual(len(items), 1))
        d.addCallback(lambda dummy: self.psclient.items(SERVICE, COMMENTS_NODE_ID_2))
        d.addCallback(lambda items: self.assertEqual(len(items), 2))
        return d

    def test_deleteAllGroupBlogsComments(self):
        """Delete the comments we posted on other node's"""
        self._initialise(C.PROFILE[0])
        self.host.profiles[C.PROFILE[0]].roster.addItem(jid.JID(OTHER_PUBLISHER))
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(lambda dummy: self.psclient.publish(SERVICE, COMMENTS_NODE_ID_1, [COMMENT_1, COMMENT_2]))
        d.addCallback(lambda dummy: self.psclient.items(SERVICE, NODE_ID))
        d.addCallback(lambda items: self.assertEqual(len(items), 1))
        d.addCallback(lambda dummy: self.psclient.items(SERVICE, COMMENTS_NODE_ID_1))
        d.addCallback(lambda items: self.assertEqual(len(items), 2))

        d.addCallback(lambda dummy: self.psclient.publish(SERVICE, OTHER_NODE_ID, [ITEM_2]))
        d.addCallback(lambda dummy: self.psclient.publish(SERVICE, COMMENTS_NODE_ID_2, [COMMENT_1, COMMENT_2]))
        d.addCallback(lambda dummy: self.psclient.items(SERVICE, OTHER_NODE_ID))
        d.addCallback(lambda items: self.assertEqual(len(items), 1))
        d.addCallback(lambda dummy: self.psclient.items(SERVICE, COMMENTS_NODE_ID_2))
        d.addCallback(lambda items: self.assertEqual(len(items), 2))

        def clean(res):
            del self.host.plugins['XEP-0060'].node_cache[C.PROFILE[0] + '@found@' + SERVICE]
            return res

        d.addCallback(lambda dummy: self.plugin.deleteAllGroupBlogsComments(C.PROFILE[0]))
        d.addCallback(clean)

        d.addCallback(lambda dummy: self.psclient.items(SERVICE, NODE_ID))
        d.addCallback(lambda items: self.assertEqual(len(items), 1))
        d.addCallback(lambda dummy: self.psclient.items(SERVICE, COMMENTS_NODE_ID_1))
        d.addCallback(lambda items: self.assertEqual(len(items), 2))

        d.addCallback(lambda dummy: self.psclient.items(SERVICE, OTHER_NODE_ID))
        d.addCallback(lambda items: self.assertEqual(len(items), 1))
        d.addCallback(lambda dummy: self.psclient.items(SERVICE, COMMENTS_NODE_ID_2))
        d.addCallback(lambda items: self.assertEqual(len(items), 0))
        return d

    def test_deleteAllGroupBlogsAndComments(self):
        self._initialise(C.PROFILE[0])
        self.host.profiles[C.PROFILE[0]].roster.addItem(jid.JID(OTHER_PUBLISHER))
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(lambda dummy: self.psclient.publish(SERVICE, COMMENTS_NODE_ID_1, [COMMENT_1, COMMENT_2]))
        d.addCallback(lambda dummy: self.psclient.items(SERVICE, NODE_ID))
        d.addCallback(lambda items: self.assertEqual(len(items), 1))
        d.addCallback(lambda dummy: self.psclient.items(SERVICE, COMMENTS_NODE_ID_1))
        d.addCallback(lambda items: self.assertEqual(len(items), 2))

        d.addCallback(lambda dummy: self.psclient.publish(SERVICE, OTHER_NODE_ID, [ITEM_2]))
        d.addCallback(lambda dummy: self.psclient.publish(SERVICE, COMMENTS_NODE_ID_2, [COMMENT_1, COMMENT_2]))
        d.addCallback(lambda dummy: self.psclient.items(SERVICE, OTHER_NODE_ID))
        d.addCallback(lambda items: self.assertEqual(len(items), 1))
        d.addCallback(lambda dummy: self.psclient.items(SERVICE, COMMENTS_NODE_ID_2))
        d.addCallback(lambda items: self.assertEqual(len(items), 2))

        def clean(res):
            del self.host.plugins['XEP-0060'].node_cache[C.PROFILE[0] + '@found@' + SERVICE]
            return res

        d.addCallback(lambda dummy: self.plugin.deleteAllGroupBlogsAndComments(C.PROFILE[0]))
        d.addCallback(clean)

        d.addCallback(lambda dummy: self.psclient.items(SERVICE, NODE_ID))
        d.addCallback(lambda items: self.assertEqual(len(items), 0))
        d.addCallback(lambda dummy: self.psclient.items(SERVICE, COMMENTS_NODE_ID_1))
        d.addCallback(lambda items: self.assertEqual(len(items), 0))

        d.addCallback(lambda dummy: self.psclient.items(SERVICE, OTHER_NODE_ID))
        d.addCallback(lambda items: self.assertEqual(len(items), 1))
        d.addCallback(lambda dummy: self.psclient.items(SERVICE, COMMENTS_NODE_ID_2))
        d.addCallback(lambda items: self.assertEqual(len(items), 0))
        return d