[tracker] functional-tests: Disconnect writeback name-owner signal

[Ivan Frade <ifrade src gnome org>]

commit d90b2fb4038b0f25b496bee7c33851a4740575c4
Author: Ivan Frade <ivan frade nokia com>
Date:   Fri Feb 4 19:22:07 2011 +0200

    functional-tests: Disconnect writeback name-owner signal
    
    To avoid duplicate messages when starting/stopping the process in successive tests

 tests/functional-tests/common/utils/system.py |   15 +++++++++------
 1 files changed, 9 insertions(+), 6 deletions(-)
---
diff --git a/tests/functional-tests/common/utils/system.py b/tests/functional-tests/common/utils/system.py
index 2718ae2..0e786b5 100644
--- a/tests/functional-tests/common/utils/system.py
+++ b/tests/functional-tests/common/utils/system.py
@@ -242,18 +242,18 @@ class TrackerWritebackLifeCycle():
         """
         self.loop = gobject.MainLoop()
         dbus_loop = DBusGMainLoop(set_as_default=True)
-        bus = dbus.SessionBus (dbus_loop)
+        self.bus = dbus.SessionBus (dbus_loop)
 
-        obj = bus.get_object ("org.freedesktop.DBus",
+        obj = self.bus.get_object ("org.freedesktop.DBus",
                               "/org/freedesktop/DBus")
         self.admin = dbus.Interface (obj, dbus_interface="org.freedesktop.DBus")
         if (self.admin.NameHasOwner (cfg.WRITEBACK_BUSNAME)):
             raise Exception ("Writeback is already running! kill it before starting this one")
 
-        bus.add_signal_receiver (self.__name_owner_changed_cb,
-                                 signal_name="NameOwnerChanged",
-                                 path="/org/freedesktop/DBus",
-                                 dbus_interface="org.freedesktop.DBus")
+        self.name_owner_match = self.bus.add_signal_receiver (self.__name_owner_changed_cb,
+                                                              signal_name="NameOwnerChanged",
+                                                              path="/org/freedesktop/DBus",
+                                                              dbus_interface="org.freedesktop.DBus")
         self.__start_tracker_writeback ()
 
         # It should step out of this loop when the writeback is visible in DBus
@@ -263,6 +263,9 @@ class TrackerWritebackLifeCycle():
     def stop (self):
         assert self.process
         self.process.kill ()
+        self.bus._clean_up_signal_match (self.name_owner_match)
+        print "[writeback] stop."
+        
 
     def __name_owner_changed_cb (self, name, old_owner, new_owner):
         if name == cfg.WRITEBACK_BUSNAME: