def __set__(self, instance, value):
try:
try:
old = self._getter(instance)
except AttributeError:
old = NoDefault
super(trait, self).__set__(instance, value)
except Exception as exc:
self.trigger(instance, "error", exc=exc)
raise
self.trigger(instance, "changed", old=old, new=value)
if hasattr(old, "__snitch__"):
disconnect(instance, old, self)
if hasattr(value, "__snitch__"):
connect(instance, value, self)
def test_connected(self):
obj1 = AnyObject()
obj2 = AnyObject()
obj3 = AnyObject()
init_events(obj1, obj2, obj3)
self.assertFalse(connected(obj1, obj2))
connect(obj1, obj2, 'attr')
self.assertTrue(connected(obj1, obj2))
self.assertFalse(connected(obj2, obj1))
connect(obj2, obj3, 'attr')
self.assertTrue(connected(obj1, obj3))
self.assertTrue(connected(obj2, obj3))
self.assertFalse(connected(obj3, obj2))
self.assertFalse(connected(obj3, obj1))
def __set__(self, instance, value):
try:
try:
old = self._getter(instance)
except AttributeError:
old = NoDefault
super(trait, self).__set__(instance, value)
except Exception as exc:
self.trigger(instance, 'error', exc=exc)
raise
self.trigger(instance, 'changed', old=old, new=value)
if hasattr(old, '__snitch__'):
disconnect(instance, old, self)
if hasattr(value, '__snitch__'):
connect(instance, value, self)
def test_connected(self):
obj1 = AnyObject()
obj2 = AnyObject()
obj3 = AnyObject()
init_events(obj1, obj2, obj3)
self.assertFalse(connected(obj1, obj2))
connect(obj1, obj2, 'attr')
self.assertTrue(connected(obj1, obj2))
self.assertFalse(connected(obj2, obj1))
connect(obj2, obj3, 'attr')
self.assertTrue(connected(obj1, obj3))
self.assertTrue(connected(obj2, obj3))
self.assertFalse(connected(obj3,obj2))
self.assertFalse(connected(obj3, obj1))
def test_chain(self):
global id1, id2
id1, id2 = 0, 0
obj1 = AnyObject()
obj2 = AnyObject()
obj3 = AnyObject()
obj4 = AnyObject()
init_events(
obj1,
obj2,
obj3,
obj4,
)
connect(obj1, obj2, 'c12')
connect(obj2, obj3, 'c23')
connect(obj2, obj4, 'c24')
def seen3(event):
global id1
id1 = True
self.assertEqual(event.target, ('c12', 'c23', 'x'))
events(obj1).listen(('c12', 'c23', 'x'), seen3)
events(obj3).etrigger('x')
self.assertTrue(id1)
disconnect(obj1, obj2, 'c12')
id1 = False
events(obj3).etrigger('x')
self.assertFalse(id1)
connect(obj1, obj2, 'c12')
del obj2 #Brake Link
gc.collect()
events(obj3).etrigger('x')
self.assertFalse(id1)
def test_event_cycle(self):
obj1 = AnyObject()
obj2 = AnyObject()
obj3 = AnyObject()
init_events(obj1, obj2, obj3)
self.assertFalse(connected(obj1, obj2))
connect(obj1, obj2, 'attr')
connect(obj2, obj3, 'attr')
with self.assertRaises(EventCycleError):
connect(obj3, obj1, 'attr')
def test_event_cycle(self):
obj1 = AnyObject()
obj2 = AnyObject()
obj3 = AnyObject()
init_events(obj1, obj2, obj3)
self.assertFalse(connected(obj1, obj2))
connect(obj1, obj2, 'attr')
connect(obj2, obj3, 'attr')
with self.assertRaises(EventCycleError):
connect(obj3, obj1, 'attr')
def test_chain(self):
global id1, id2
id1, id2 = 0, 0
obj1 = AnyObject()
obj2 = AnyObject()
obj3 = AnyObject()
obj4 = AnyObject()
init_events(obj1, obj2, obj3, obj4,)
connect(obj1, obj2, 'c12')
connect(obj2, obj3, 'c23')
connect(obj2, obj4, 'c24')
def seen3(event):
global id1
id1 = True
self.assertEqual(event.target, ('c12', 'c23', 'x'))
events(obj1).listen(('c12', 'c23', 'x'), seen3)
events(obj3).etrigger('x')
self.assertTrue(id1)
disconnect(obj1, obj2, 'c12')
id1 = False
events(obj3).etrigger('x')
self.assertFalse(id1)
connect(obj1, obj2, 'c12')
del obj2 #Brake Link
gc.collect()
events(obj3).etrigger('x')
self.assertFalse(id1)
