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v2.2.1

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test_event.py

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import clr

clr.AddReference('Python.Test')

import sys, os, string, unittest, types

from Python.Test import EventTest, TestEventHandler

from Python.Test import TestEventArgs

class EventTests(unittest.TestCase):

"""Test CLR event support."""

def testPublicInstanceEvent(self):

"""Test public instance events."""

object = EventTest()

handler = GenericHandler()

self.assertTrue(handler.value == None)

object.PublicEvent += handler.handler

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(handler.value == 10)

object.PublicEvent -= handler.handler

def testPublicStaticEvent(self):

"""Test public static events."""

handler = GenericHandler()

self.assertTrue(handler.value == None)

EventTest.PublicStaticEvent += handler.handler

EventTest.OnPublicStaticEvent(TestEventArgs(10))

self.assertTrue(handler.value == 10)

def testProtectedInstanceEvent(self):

"""Test protected instance events."""

object = EventTest()

handler = GenericHandler()

self.assertTrue(handler.value == None)

object.ProtectedEvent += handler.handler

object.OnProtectedEvent(TestEventArgs(10))

self.assertTrue(handler.value == 10)

object.ProtectedEvent -= handler.handler

def testProtectedStaticEvent(self):

"""Test protected static events."""

object = EventTest

handler = GenericHandler()

self.assertTrue(handler.value == None)

EventTest.ProtectedStaticEvent += handler.handler

EventTest.OnProtectedStaticEvent(TestEventArgs(10))

self.assertTrue(handler.value == 10)

EventTest.ProtectedStaticEvent -= handler.handler

def testInternalEvents(self):

"""Test internal events."""

def test():

f = EventTest().InternalEvent

self.assertRaises(AttributeError, test)

def test():

f = EventTest().InternalStaticEvent

self.assertRaises(AttributeError, test)

def test():

f = EventTest.InternalStaticEvent

self.assertRaises(AttributeError, test)

def testPrivateEvents(self):

"""Test private events."""

def test():

f = EventTest().PrivateEvent

self.assertRaises(AttributeError, test)

def test():

f = EventTest().PrivateStaticEvent

self.assertRaises(AttributeError, test)

def test():

f = EventTest.PrivateStaticEvent

self.assertRaises(AttributeError, test)

def testMulticastEvent(self):

"""Test multicast events."""

object = EventTest()

handler1 = GenericHandler()

handler2 = GenericHandler()

handler3 = GenericHandler()

object.PublicEvent += handler1.handler

object.PublicEvent += handler2.handler

object.PublicEvent += handler3.handler

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(handler1.value == 10)

self.assertTrue(handler2.value == 10)

self.assertTrue(handler3.value == 10)

object.OnPublicEvent(TestEventArgs(20))

self.assertTrue(handler1.value == 20)

self.assertTrue(handler2.value == 20)

self.assertTrue(handler3.value == 20)

object.PublicEvent -= handler1.handler

object.PublicEvent -= handler2.handler

object.PublicEvent -= handler3.handler

def testInstanceMethodHandler(self):

"""Test instance method handlers."""

object = EventTest()

handler = GenericHandler()

object.PublicEvent += handler.handler

self.assertTrue(handler.value == None)

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(handler.value == 10)

object.PublicEvent -= handler.handler

self.assertTrue(handler.value == 10)

object.OnPublicEvent(TestEventArgs(20))

self.assertTrue(handler.value == 10)

def testVarArgsInstanceMethodHandler(self):

"""Test vararg instance method handlers."""

object = EventTest()

handler = VariableArgsHandler()

object.PublicEvent += handler.handler

self.assertTrue(handler.value == None)

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(handler.value == 10)

object.PublicEvent -= handler.handler

self.assertTrue(handler.value == 10)

object.OnPublicEvent(TestEventArgs(20))

self.assertTrue(handler.value == 10)

def testCallableObjectHandler(self):

"""Test callable object handlers."""

object = EventTest()

handler = CallableHandler()

object.PublicEvent += handler

self.assertTrue(handler.value == None)

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(handler.value == 10)

object.PublicEvent -= handler

self.assertTrue(handler.value == 10)

object.OnPublicEvent(TestEventArgs(20))

self.assertTrue(handler.value == 10)

def testVarArgsCallableHandler(self):

"""Test varargs callable handlers."""

object = EventTest()

handler = VarCallableHandler()

object.PublicEvent += handler

self.assertTrue(handler.value == None)

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(handler.value == 10)

object.PublicEvent -= handler

self.assertTrue(handler.value == 10)

object.OnPublicEvent(TestEventArgs(20))

self.assertTrue(handler.value == 10)

def testStaticMethodHandler(self):

"""Test static method handlers."""

object = EventTest()

handler = StaticMethodHandler()

StaticMethodHandler.value = None

object.PublicEvent += handler.handler

self.assertTrue(handler.value == None)

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(handler.value == 10)

object.PublicEvent -= handler.handler

self.assertTrue(handler.value == 10)

object.OnPublicEvent(TestEventArgs(20))

self.assertTrue(handler.value == 10)

def testClassMethodHandler(self):

"""Test class method handlers."""

object = EventTest()

handler = ClassMethodHandler()

ClassMethodHandler.value = None

object.PublicEvent += handler.handler

self.assertTrue(handler.value == None)

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(handler.value == 10)

object.PublicEvent -= handler.handler

self.assertTrue(handler.value == 10)

object.OnPublicEvent(TestEventArgs(20))

self.assertTrue(handler.value == 10)

def testManagedInstanceMethodHandler(self):

"""Test managed instance method handlers."""

object = EventTest()

object.PublicEvent += object.GenericHandler

self.assertTrue(object.value == 0)

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(object.value == 10)

object.PublicEvent -= object.GenericHandler

self.assertTrue(object.value == 10)

object.OnPublicEvent(TestEventArgs(20))

self.assertTrue(object.value == 10)

def testManagedStaticMethodHandler(self):

"""Test managed static method handlers."""

object = EventTest()

EventTest.s_value = 0

object.PublicEvent += object.StaticHandler

self.assertTrue(EventTest.s_value == 0)

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(EventTest.s_value == 10)

object.PublicEvent -= object.StaticHandler

self.assertTrue(EventTest.s_value == 10)

object.OnPublicEvent(TestEventArgs(20))

self.assertTrue(EventTest.s_value == 10)

def testUnboundMethodHandler(self):

"""Test failure mode for unbound method handlers."""

object = EventTest()

object.PublicEvent += GenericHandler.handler

try:

object.OnPublicEvent(TestEventArgs(10))

except TypeError:

object.PublicEvent -= GenericHandler.handler

return

raise TypeError("should have raised a TypeError")

def testFunctionHandler(self):

"""Test function handlers."""

object = EventTest()

dict = {'value': None}

def handler(sender, args, dict=dict):

dict['value'] = args.value

object.PublicEvent += handler

self.assertTrue(dict['value'] == None)

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(dict['value'] == 10)

object.PublicEvent -= handler

self.assertTrue(dict['value'] == 10)

object.OnPublicEvent(TestEventArgs(20))

self.assertTrue(dict['value'] == 10)

def testAddNonCallableHandler(self):

"""Test handling of attempts to add non-callable handlers."""

def test():

object = EventTest()

object.PublicEvent += 10

self.assertRaises(TypeError, test)

def test():

object = EventTest()

object.PublicEvent += "spam"

self.assertRaises(TypeError, test)

def test():

class spam:

pass

object = EventTest()

object.PublicEvent += spam()

self.assertRaises(TypeError, test)

def testRemoveMultipleHandlers(self):

"""Test removing multiple instances of the same handler."""

object = EventTest()

handler = MultipleHandler()

h1 = handler.handler

object.PublicEvent += h1

h2 = handler.handler

object.PublicEvent += h2

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(handler.value == 20)

object.PublicEvent -= h1

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(handler.value == 30)

object.PublicEvent -= h2

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(handler.value == 30)

# try again, removing in a different order.

object = EventTest()

handler = MultipleHandler()

h1 = handler.handler

object.PublicEvent += h1

h2 = handler.handler

object.PublicEvent += h2

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(handler.value == 20)

object.PublicEvent -= h2

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(handler.value == 30)

object.PublicEvent -= h1

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(handler.value == 30)

def testRemoveMultipleStaticHandlers(self):

"""Test removing multiple instances of a static handler."""

object = EventTest()

handler = MultipleHandler()

h1 = handler.handler

object.PublicStaticEvent += h1

h2 = handler.handler

object.PublicStaticEvent += h2

object.OnPublicStaticEvent(TestEventArgs(10))

self.assertTrue(handler.value == 20)

object.PublicStaticEvent -= h1

object.OnPublicStaticEvent(TestEventArgs(10))

self.assertTrue(handler.value == 30)

object.PublicStaticEvent -= h2

object.OnPublicStaticEvent(TestEventArgs(10))

self.assertTrue(handler.value == 30)

# try again, removing in a different order.

object = EventTest()

handler = MultipleHandler()

h1 = handler.handler

object.PublicStaticEvent += h1

h2 = handler.handler

object.PublicStaticEvent += h2

object.OnPublicStaticEvent(TestEventArgs(10))

self.assertTrue(handler.value == 20)

object.PublicStaticEvent -= h2

object.OnPublicStaticEvent(TestEventArgs(10))

self.assertTrue(handler.value == 30)

object.PublicStaticEvent -= h1

object.OnPublicStaticEvent(TestEventArgs(10))

self.assertTrue(handler.value == 30)

def testRandomMultipleHandlers(self):

"""Test random subscribe / unsubscribe of the same handlers."""

import random

object = EventTest()

handler = MultipleHandler()

handler2 = MultipleHandler()

object.PublicEvent += handler2.handler

object.PublicEvent += handler2.handler

handlers = []

for i in range(30):

method = handler.handler

object.PublicEvent += method

handlers.append(method)

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(handler.value == 300)

self.assertTrue(handler2.value == 20)

handler.value = 0

handler2.value = 0

for i in range(30):

item = random.choice(handlers)

handlers.remove(item)

object.PublicEvent -= item

handler.value = 0

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(handler.value == (len(handlers) * 10))

self.assertTrue(handler2.value == ((i + 1) * 20))

handler2.value = 0

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(handler2.value == 20)

object.PublicEvent -= handler2.handler

handler2.value = 0

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(handler2.value == 10)

object.PublicEvent -= handler2.handler

handler2.value = 0

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(handler2.value == 0)

def testRemoveInternalCallHandler(self):

"""Test remove on an event sink implemented w/internalcall."""

object = EventTest()

def h(sender, args):

pass

object.PublicEvent += h

object.PublicEvent -= h

def testRemoveUnknownHandler(self):

"""Test removing an event handler that was never added."""

def test():

object = EventTest()

handler = GenericHandler()

object.PublicEvent -= handler.handler

self.assertRaises(ValueError, test)

def testHandlerCallbackFailure(self):

"""Test failure mode for inappropriate handlers."""

class BadHandler:

def handler(self, one):

return 'too many'

object = EventTest()

handler = BadHandler()

def test():

object.PublicEvent += handler.handler

object.OnPublicEvent(TestEventArgs(10))

self.assertRaises(TypeError, test)

object.PublicEvent -= handler.handler

class BadHandler:

def handler(self, one, two, three, four, five):

return 'not enough'

object = EventTest()

handler = BadHandler()

def test():

object.PublicEvent += handler.handler

object.OnPublicEvent(TestEventArgs(10))

self.assertRaises(TypeError, test)

object.PublicEvent -= handler.handler

def testIncorrectInvokation(self):

"""Test incorrect invokation of events."""

object = EventTest()

handler = GenericHandler()

object.PublicEvent += handler.handler

def test():

object.OnPublicEvent()

self.assertRaises(TypeError, test)

def test():

object.OnPublicEvent(32)

self.assertRaises(TypeError, test)

object.PublicEvent -= handler.handler

def testExplicitCLSEventRegistration(self):

"""Test explicit CLS event registration."""

object = EventTest()

handler = GenericHandler()

delegate = TestEventHandler(handler.handler)

object.add_PublicEvent(delegate)

self.assertTrue(handler.value == None)

object.OnPublicEvent(TestEventArgs(10))

self.assertTrue(handler.value == 10)

object.remove_PublicEvent(delegate)

self.assertTrue(handler.value == 10)

object.OnPublicEvent(TestEventArgs(20))

self.assertTrue(handler.value == 10)

def testImplicitCLSEventRegistration(self):

"""Test implicit CLS event registration."""

def test():

object = EventTest()

handler = GenericHandler()

object.add_PublicEvent(handler.handler)

self.assertRaises(TypeError, test)

def testEventDescriptorAbuse(self):

"""Test event descriptor abuse."""

def test():

del EventTest.PublicEvent

self.assertRaises(TypeError, test)

def test():

del EventTest.__dict__['PublicEvent']

self.assertRaises(TypeError, test)

desc = EventTest.__dict__['PublicEvent']

def test():

desc.__get__(0, 0)

self.assertRaises(TypeError, test)

def test():

desc.__set__(0, 0)

self.assertRaises(TypeError, test)

def test():

object = EventTest()

object.PublicEvent = 0

self.assertRaises(TypeError, test)

def test():

EventTest.PublicStaticEvent = 0

self.assertRaises(TypeError, test)

class GenericHandler:

"""A generic handler to test event callbacks."""

def __init__(self):

self.value = None

def handler(self, sender, args):

self.value = args.value

class VariableArgsHandler:

"""A variable args handler to test event callbacks."""

def __init__(self):

self.value = None

def handler(self, *args):

ob, eventargs = args

self.value = eventargs.value

class CallableHandler:

"""A callable handler to test event callbacks."""

def __init__(self):

self.value = None

def __call__(self, sender, args):

self.value = args.value

class VarCallableHandler:

"""A variable args callable handler to test event callbacks."""

def __init__(self):

self.value = None

def __call__(self, *args):

ob, eventargs = args

self.value = eventargs.value

class StaticMethodHandler(object):

"""A static method handler to test event callbacks."""

value = None

def handler(sender, args):

StaticMethodHandler.value = args.value

handler = staticmethod(handler)

class ClassMethodHandler(object):

"""A class method handler to test event callbacks."""

value = None

def handler(cls, sender, args):

cls.value = args.value

handler = classmethod(handler)

class MultipleHandler:

"""A generic handler to test multiple callbacks."""

def __init__(self):

self.value = 0

def handler(self, sender, args):

self.value += args.value

def test_suite():

return unittest.makeSuite(EventTests)

def main():

unittest.TextTestRunner().run(test_suite())

if __name__ == '__main__':

main()