view libervia/backend/test/test_plugin_misc_groupblog.py @ 4219:1b5cf2ee1d86

plugin XEP-0384, XEP-0391: download missing devices list: when a peer jid was not in our roster, devices list was not retrieved, resulting in failed en/decryption. This patch does check it and download missing devices list in necessary. There is no subscription managed yet, so the list won't be updated in case of new devices, this should be addressed at some point.
author Goffi <goffi@goffi.org>
date Tue, 05 Mar 2024 17:31:36 +0100
parents 4b842c1fb686
children 0d7bb4df2343
line wrap: on
line source

#!/usr/bin/env python3


# SAT: a jabber client
# Copyright (C) 2009-2021 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 libervia.backend.test import helpers, helpers_plugins
from libervia.backend.plugins import plugin_misc_groupblog
from libervia.backend.plugins import plugin_xep_0060
from libervia.backend.plugins import plugin_xep_0277
from libervia.backend.plugins import plugin_xep_0163
from libervia.backend.plugins import plugin_misc_text_syntaxes
from twisted.internet import defer
from twisted.words.protocols.jabber import jid
import importlib


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

DO_NOT_COUNT_COMMENTS = -1

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


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


def COMMENTS_NODE_URL(publisher=PUBLISHER):
    return "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 """
          <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 """
          <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": str(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)
        importlib.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.get_client(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_get_disco_items
            self.__initialised = True
        return defer.succeed((profile, client))

    def _add_item(self, profile, item, parent_node=None):
        client = self.host.get_client(profile)
        client.pubsub_client._add_item(item, parent_node)

    def test_send_group_blog(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 __: self.plugin.sendGroupBlog(
                "PUBLIC", [], "test", {}, C.PROFILE[0]
            )
        )
        d.addCallback(lambda __: self.psclient.items(SERVICE, NODE_ID))
        return d.addCallback(lambda items: self.assertEqual(len(items), 1))

    def test_delete_group_blog(self):
        pub_data = (SERVICE, NODE_ID, ITEM_ID_1)
        self.host.bridge.expect_call(
            "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 __: self.plugin.deleteGroupBlog(
                pub_data, COMMENTS_NODE_URL_1, profile_key=C.PROFILE[0]
            )
        )
        return d.addCallback(self.assertEqual, None)

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

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

    def test_send_group_blog_comment(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 __: self.plugin.sendGroupBlogComment(
                COMMENTS_NODE_URL_1, "test", {}, profile_key=C.PROFILE[0]
            )
        )
        d.addCallback(lambda __: self.psclient.items(SERVICE, COMMENTS_NODE_ID_1))
        return d.addCallback(lambda items: self.assertEqual(len(items), 1))

    def test_get_group_blogs(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(
            lambda __: 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_get_group_blogs_no_count(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(
            lambda __: 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_get_group_blogs_with_i_ds(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(
            lambda __: 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_get_group_blogs_with_rsm(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(
            lambda __: 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_get_group_blogs_with_comments(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(
            lambda __: self.psclient.publish(SERVICE, COMMENTS_NODE_ID_1, [COMMENT_1])
        )
        d.addCallback(
            lambda __: 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_get_group_blogs_with_comments_2(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(
            lambda __: self.psclient.publish(
                SERVICE, COMMENTS_NODE_ID_1, [COMMENT_1, COMMENT_2]
            )
        )
        d.addCallback(
            lambda __: 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_get_group_blogs_atom(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(
            lambda __: self.plugin.getGroupBlogsAtom(
                PUBLISHER, {"max_": 1}, profile_key=C.PROFILE[0]
            )
        )

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

        return d.addCallback(cb)

    def test_get_massive_group_blogs(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(
            lambda __: 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_get_massive_group_blogs_with_comments(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(
            lambda __: self.psclient.publish(
                SERVICE, COMMENTS_NODE_ID_1, [COMMENT_1, COMMENT_2]
            )
        )
        d.addCallback(
            lambda __: 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_get_group_blog_comments(self):
        self._initialise(C.PROFILE[0])
        d = self.psclient.publish(SERVICE, NODE_ID, [ITEM_1])
        d.addCallback(
            lambda __: self.psclient.publish(SERVICE, COMMENTS_NODE_ID_1, [COMMENT_1])
        )
        d.addCallback(
            lambda __: 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_subscribe_group_blog(self):
        self._initialise(C.PROFILE[0])
        d = self.plugin.subscribeGroupBlog(PUBLISHER, profile_key=C.PROFILE[0])
        return d.addCallback(self.assertEqual, None)

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

        d.addCallback(
            lambda __: self.psclient.publish(SERVICE, OTHER_NODE_ID, [ITEM_2])
        )
        d.addCallback(
            lambda __: self.psclient.publish(
                SERVICE, COMMENTS_NODE_ID_2, [COMMENT_1, COMMENT_2]
            )
        )
        d.addCallback(lambda __: self.psclient.items(SERVICE, OTHER_NODE_ID))
        d.addCallback(lambda items: self.assertEqual(len(items), 1))
        d.addCallback(lambda __: 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 __: self.plugin.deleteAllGroupBlogs(C.PROFILE[0]))
        d.addCallback(clean)

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

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

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

        d.addCallback(
            lambda __: self.psclient.publish(SERVICE, OTHER_NODE_ID, [ITEM_2])
        )
        d.addCallback(
            lambda __: self.psclient.publish(
                SERVICE, COMMENTS_NODE_ID_2, [COMMENT_1, COMMENT_2]
            )
        )
        d.addCallback(lambda __: self.psclient.items(SERVICE, OTHER_NODE_ID))
        d.addCallback(lambda items: self.assertEqual(len(items), 1))
        d.addCallback(lambda __: 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 __: self.plugin.deleteAllGroupBlogsComments(C.PROFILE[0]))
        d.addCallback(clean)

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

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

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

        d.addCallback(
            lambda __: self.psclient.publish(SERVICE, OTHER_NODE_ID, [ITEM_2])
        )
        d.addCallback(
            lambda __: self.psclient.publish(
                SERVICE, COMMENTS_NODE_ID_2, [COMMENT_1, COMMENT_2]
            )
        )
        d.addCallback(lambda __: self.psclient.items(SERVICE, OTHER_NODE_ID))
        d.addCallback(lambda items: self.assertEqual(len(items), 1))
        d.addCallback(lambda __: 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 __: self.plugin.deleteAllGroupBlogsAndComments(C.PROFILE[0])
        )
        d.addCallback(clean)

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

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