--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libervia/backend/test/test_helpers_plugins.py	Fri Jun 02 11:49:51 2023 +0200
@@ -0,0 +1,124 @@
+#!/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/>.
+
+""" Test the helper classes to see if they behave well"""
+
+from libervia.backend.test import helpers
+from libervia.backend.test import helpers_plugins
+
+
+class FakeXEP_0045Test(helpers.SatTestCase):
+    def setUp(self):
+        self.host = helpers.FakeSAT()
+        self.plugin = helpers_plugins.FakeXEP_0045(self.host)
+
+    def test_join_room(self):
+        self.plugin.join_room(0, 0)
+        self.assertEqual("test", self.plugin.get_nick(0, 0))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 0, 0))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 1, 0))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 2, 0))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 3, 0))
+        self.assertEqual("", self.plugin.get_nick(0, 1))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 0, 1))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 1, 1))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 2, 1))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 3, 1))
+        self.assertEqual("", self.plugin.get_nick(0, 2))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 0, 2))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 1, 2))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 2, 2))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 3, 2))
+        self.assertEqual("", self.plugin.get_nick(0, 3))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 0, 3))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 1, 3))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 2, 3))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 3, 3))
+        self.plugin.join_room(0, 1)
+        self.assertEqual("test", self.plugin.get_nick(0, 0))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 0, 0))
+        self.assertEqual("sender", self.plugin.get_nick_of_user(0, 1, 0))
+        self.assertEqual("sender", self.plugin.get_nick_of_user(0, 2, 0))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 3, 0))
+        self.assertEqual("sender", self.plugin.get_nick(0, 1))
+        self.assertEqual("test", self.plugin.get_nick_of_user(0, 0, 1))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 1, 1))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 2, 1))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 3, 1))
+        self.assertEqual("", self.plugin.get_nick(0, 2))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 0, 2))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 1, 2))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 2, 2))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 3, 2))
+        self.assertEqual("", self.plugin.get_nick(0, 3))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 0, 3))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 1, 3))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 2, 3))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 3, 3))
+        self.plugin.join_room(0, 2)
+        self.assertEqual("test", self.plugin.get_nick(0, 0))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 0, 0))
+        self.assertEqual("sender", self.plugin.get_nick_of_user(0, 1, 0))
+        self.assertEqual("sender", self.plugin.get_nick_of_user(0, 2, 0))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 3, 0))
+        self.assertEqual("sender", self.plugin.get_nick(0, 1))
+        self.assertEqual("test", self.plugin.get_nick_of_user(0, 0, 1))
+        self.assertEqual(
+            "sender", self.plugin.get_nick_of_user(0, 1, 1)
+        )  # Const.JID[2] is in the roster for Const.PROFILE[1]
+        self.assertEqual("sender", self.plugin.get_nick_of_user(0, 2, 1))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 3, 1))
+        self.assertEqual("sender", self.plugin.get_nick(0, 2))
+        self.assertEqual("test", self.plugin.get_nick_of_user(0, 0, 2))
+        self.assertEqual("sender", self.plugin.get_nick_of_user(0, 1, 2))
+        self.assertEqual(
+            "sender", self.plugin.get_nick_of_user(0, 2, 2)
+        )  # Const.JID[1] is in the roster for Const.PROFILE[2]
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 3, 2))
+        self.assertEqual("", self.plugin.get_nick(0, 3))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 0, 3))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 1, 3))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 2, 3))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 3, 3))
+        self.plugin.join_room(0, 3)
+        self.assertEqual("test", self.plugin.get_nick(0, 0))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 0, 0))
+        self.assertEqual("sender", self.plugin.get_nick_of_user(0, 1, 0))
+        self.assertEqual("sender", self.plugin.get_nick_of_user(0, 2, 0))
+        self.assertEqual("sender_", self.plugin.get_nick_of_user(0, 3, 0))
+        self.assertEqual("sender", self.plugin.get_nick(0, 1))
+        self.assertEqual("test", self.plugin.get_nick_of_user(0, 0, 1))
+        self.assertEqual(
+            "sender", self.plugin.get_nick_of_user(0, 1, 1)
+        )  # Const.JID[2] is in the roster for Const.PROFILE[1]
+        self.assertEqual("sender", self.plugin.get_nick_of_user(0, 2, 1))
+        self.assertEqual("sender_", self.plugin.get_nick_of_user(0, 3, 1))
+        self.assertEqual("sender", self.plugin.get_nick(0, 2))
+        self.assertEqual("test", self.plugin.get_nick_of_user(0, 0, 2))
+        self.assertEqual("sender", self.plugin.get_nick_of_user(0, 1, 2))
+        self.assertEqual(
+            "sender", self.plugin.get_nick_of_user(0, 2, 2)
+        )  # Const.JID[1] is in the roster for Const.PROFILE[2]
+        self.assertEqual("sender_", self.plugin.get_nick_of_user(0, 3, 2))
+        self.assertEqual("sender_", self.plugin.get_nick(0, 3))
+        self.assertEqual("test", self.plugin.get_nick_of_user(0, 0, 3))
+        self.assertEqual("sender", self.plugin.get_nick_of_user(0, 1, 3))
+        self.assertEqual("sender", self.plugin.get_nick_of_user(0, 2, 3))
+        self.assertEqual(None, self.plugin.get_nick_of_user(0, 3, 3))