Fixed bug in presence subscription handling.

Subscription requests and responses were not setting the correct 'to'
attribute.

sleekxmpp/basexmpp.py

@@ -621,8 +621,8 @@ def _handle_subscribe(self, presence):
         None       *          Disable automatic handling and use
                               a custom handler.
         """
-        presence = self.Presence()
-        presence['to'] = presence['from'].bare
+        presence.reply()
+        presence['to'] = presence['to'].bare
 
         # We are using trinary logic, so conditions have to be
         # more explicit than usual.

tests/test_stream_presence.py

@@ -82,5 +82,47 @@ def got_offline(presence):
         self.assertEqual(events, ['got_offline'],
                 "Got offline incorrectly triggered: %s" % events)
 
+    def testAutoAuthorizeAndSubscribe(self):
+        """
+        Test auto authorizing and auto subscribing
+        to subscription requests.
+        """
+
+        events = set()
+
+        def presence_subscribe(p):
+            events.add('presence_subscribe')
+
+        def changed_subscription(p):
+            events.add('changed_subscription')
+
+        self.stream_start(jid='tester@localhost')
+
+        self.xmpp.add_event_handler('changed_subscription', 
+                                    changed_subscription)
+        self.xmpp.add_event_handler('presence_subscribe',
+                                    presence_subscribe)
+
+        # With these settings we should accept a subscription
+        # and request a subscription in return.
+        self.xmpp.auto_authorize = True
+        self.xmpp.auto_subscribe = True
+
+        self.stream_recv("""
+          <presence from="user@localhost" type="subscribe" />
+        """)
+
+        self.stream_send_presence("""
+          <presence to="user@localhost" type="subscribed" />
+        """)
+
+        self.stream_send_presence("""
+          <presence to="user@localhost" type="subscribe" />
+        """)
+
+        expected = set(('presence_subscribe', 'changed_subscription'))
+        self.assertEqual(events, expected, 
+                "Incorrect events triggered: %s" % events)
+
 
 suite = unittest.TestLoader().loadTestsFromTestCase(TestStreamPresence)