tests/dbus-runner: Add mocked screensaver service

Part-of: <https://gitlab.gnome.org/GNOME/mutter/-/merge_requests/3234>

src/tests/dbusmock-templates/screensaver.py

@@ -0,0 +1,35 @@
+'''org.freedesktop.Screensaver proxy mock template
+'''
+
+# This program is free software; you can redistribute it and/or modify it under
+# the terms of the GNU Lesser General Public License as published by the Free
+# Software Foundation; either version 3 of the License, or (at your option) any
+# later version.  See http://www.gnu.org/copyleft/lgpl.html for the full text
+# of the license.
+
+__author__ = 'Jonas Ådahl'
+__copyright__ = '(c) 2023 Red Hat Inc.'
+
+import dbus
+import os
+import random
+from dbusmock import MOCK_IFACE
+
+
+BUS_NAME = 'org.freedesktop.Screensaver'
+MAIN_OBJ = '/org/freedesktop/Screensaver'
+MAIN_IFACE = BUS_NAME
+SYSTEM_BUS = False
+
+
+def load(mock, parameters=None):
+    pass
+
+
+@dbus.service.method(MAIN_IFACE, in_signature='ss', out_signature='u')
+def Inhibit(self, application_name, reason):
+    return random.randint(0, 10000)
+
+@dbus.service.method(MAIN_IFACE, in_signature='u')
+def Uninhibit(self, cookie):
+    pass

src/tests/mutter_dbusrunner.py

@@ -49,6 +49,7 @@ class MutterDBusRunner(DBusTestCase):
         klass.start_from_local_template('colord')
         klass.start_from_local_template('gsd-color')
         klass.start_from_local_template('rtkit')
+        klass.start_from_local_template('screensaver')
 
         klass.system_bus_con = klass.get_dbus(system_bus=True)
         klass.session_bus_con = klass.get_dbus(system_bus=False)