diff --git a/tests/test_stream_filters.py b/tests/test_stream_filters.py
new file mode 100644
index 0000000..ef4d5dc
--- /dev/null
+++ b/tests/test_stream_filters.py
@@ -0,0 +1,88 @@
+import time
+
+from sleekxmpp import Message
+from sleekxmpp.test import *
+from sleekxmpp.xmlstream.handler import *
+from sleekxmpp.xmlstream.matcher import *
+
+
+class TestFilters(SleekTest):
+
+ """
+ Test using incoming and outgoing filters.
+ """
+
+ def setUp(self):
+ self.stream_start()
+
+ def tearDown(self):
+ self.stream_close()
+
+ def testIncoming(self):
+
+ data = []
+
+ def in_filter(stanza):
+ if isinstance(stanza, Message):
+ if stanza['body'] == 'testing':
+ stanza['subject'] = stanza['body'] + ' filter'
+ print('>>> %s' % stanza['subject'])
+ return stanza
+
+ def on_message(msg):
+ print('<<< %s' % msg['subject'])
+ data.append(msg['subject'])
+
+ self.xmpp.add_filter('in', in_filter)
+ self.xmpp.add_event_handler('message', on_message)
+
+ self.recv("""
+
+ no filter
+
+ """)
+
+ self.recv("""
+
+ testing
+
+ """)
+
+ time.sleep(0.5)
+
+ self.assertEqual(data, ['', 'testing filter'],
+ 'Incoming filter did not apply %s' % data)
+
+ def testOutgoing(self):
+
+ def out_filter(stanza):
+ if isinstance(stanza, Message):
+ if stanza['body'] == 'testing':
+ stanza['body'] = 'changed!'
+ return stanza
+
+ self.xmpp.add_filter('out', out_filter)
+
+ m1 = self.Message()
+ m1['body'] = 'testing'
+ m1.send()
+
+ m2 = self.Message()
+ m2['body'] = 'blah'
+ m2.send()
+
+ self.send("""
+
+ changed!
+
+ """)
+
+ self.send("""
+
+ blah
+
+ """)
+
+
+
+suite = unittest.TestLoader().loadTestsFromTestCase(TestFilters)