import sys, os
from twisted.trial import unittest
from twisted.xish.domish import Element
from twisted.xish.utility import EventDispatcher
class CallbackTracker:
def __init__(self):
self.called = 0
self.object = None
def call(self, object):
self.called = self.called + 1
self.object = object
class CallbackTracker2 (CallbackTracker):
def __init__(self, dispatcher):
CallbackTracker.__init__(self)
self.dispatcher = dispatcher
def call2(self, _):
self.dispatcher.addObserver("/presence", self.call)
class EventDispatcherTest(unittest.TestCase):
def testStuff(self):
d = EventDispatcher()
cb1 = CallbackTracker()
cb2 = CallbackTracker()
cb3 = CallbackTracker()
d.addObserver("/message/body", cb1.call)
d.addObserver("/message", cb1.call)
d.addObserver("/presence", cb2.call)
d.addObserver("//event/testevent", cb3.call)
msg = Element(("ns", "message"))
msg.addElement("body")
pres = Element(("ns", "presence"))
pres.addElement("presence")
d.dispatch(msg)
self.assertEquals(cb1.called, 2)
self.assertEquals(cb1.object, msg)
self.assertEquals(cb2.called, 0)
d.dispatch(pres)
self.assertEquals(cb1.called, 2)
self.assertEquals(cb2.called, 1)
self.assertEquals(cb2.object, pres)
self.assertEquals(cb3.called, 0)
d.dispatch(d, "//event/testevent")
self.assertEquals(cb3.called, 1)
self.assertEquals(cb3.object, d)
d.removeObserver("/presence", cb2.call)
d.dispatch(pres)
self.assertEquals(cb2.called, 1)
def testAddObserverInDispatch(self):
d = EventDispatcher()
msg = Element(("ns", "message"))
pres = Element(("ns", "presence"))
cb = CallbackTracker2(d)
d.addObserver("/message", cb.call2)
d.dispatch(msg)
self.assertEquals(cb.called, 0)
d.dispatch(pres)
self.assertEquals(cb.called, 1)
def testOnetimeDispatch(self):
d = EventDispatcher()
msg = Element(("ns", "message"))
cb = CallbackTracker()
d.addOnetimeObserver("/message", cb.call)
d.dispatch(msg)
self.assertEquals(cb.called, 1)
d.dispatch(msg)
self.assertEquals(cb.called, 1)