def test_WeakObjectInstanceMethodLifetime(self):
"""
Checks that bound functions returned from a weak object do not prevent
the referenced object from being deleted, as compared to weakref.proxy.
"""
obj = TestClass()
# Get a local reference to the bound method through a proxy; it will
# increase obj's reference count.
reffoo = weakref.proxy(obj).foo
# Get a local reference to the bound method through a weak object; it
# should not increase obj's reference count.
objfoo = weakobj.objectref(obj).foo
# Remove the original reference, and call the functions; this should
# succeed because of reffoo's im_self.
del obj
reffoo()
objfoo()
# Remove the local reference-via-proxy, which should now allow the
# original object to be deleted.
del reffoo
try:
objfoo()
except weakref.ReferenceError:
pass
else:
self.fail('Weak object should be invalidated')
def test_WeakObjectInstanceMethodLifetime(self):
"""
Checks that bound functions returned from a weak object do not prevent
the referenced object from being deleted, as compared to weakref.proxy.
"""
obj = TestClass()
# Get a local reference to the bound method through a proxy; it will
# increase obj's reference count.
reffoo = weakref.proxy(obj).foo
# Get a local reference to the bound method through a weak object; it
# should not increase obj's reference count.
objfoo = weakobj.objectref(obj).foo
# Remove the original reference, and call the functions; this should
# succeed because of reffoo's im_self.
del obj
reffoo()
objfoo()
# Remove the local reference-via-proxy, which should now allow the
# original object to be deleted.
del reffoo
try:
objfoo()
except weakref.ReferenceError:
pass
else:
self.fail('Weak object should be invalidated')
def getEventChannel(self, name):
"""
Get the sandbox event channel 'name'. If it does not exist,
throw a NameError.
"""
if name not in self._eventChannels:
raise NameError("No event channel '%s'" % name)
else:
# Return a weak proxy so that destroy() can fully delete the
# object in normal usage and ensure that it stays destroyed.
return weakobj.objectref(self._eventChannels[name])
def getEventChannel(self, name):
"""
Get the sandbox event channel 'name'. If it does not exist,
throw a NameError.
"""
if name not in self._eventChannels:
raise NameError("No event channel '%s'" % name)
else:
# Return a weak proxy so that destroy() can fully delete the
# object in normal usage and ensure that it stays destroyed.
return weakobj.objectref(self._eventChannels[name])
def test_WeakObject(self):
"""
Tests basic extended weak object support.
"""
obj = TestClass()
ref = weakref.ref(obj)
objref = weakobj.objectref(obj)
objref2 = weakobj.objectref(obj)
self.assertEquals(objref, objref2)
self.assertEquals(objref.foo(), obj.foo())
# Delete what should be the only reference to the original object.
del obj
self.assertEqual(ref(), None)
try:
objref.foo()
except weakref.ReferenceError:
pass
else:
self.fail('Weak object should be invalidated')
def test_WeakObject(self):
"""
Tests basic extended weak object support.
"""
obj = TestClass()
ref = weakref.ref(obj)
objref = weakobj.objectref(obj)
objref2 = weakobj.objectref(obj)
self.assertEquals(objref, objref2)
self.assertEquals(objref.foo(), obj.foo())
# Delete what should be the only reference to the original object.
del obj
self.assertEqual(ref(), None)
try:
objref.foo()
except weakref.ReferenceError:
pass
else:
self.fail('Weak object should be invalidated')
def test_WeakObjectCallback(self):
"""
Test that the weak object callback occurs as expected.
"""
obj = TestClass()
results = set()
def callback(target):
results.add(id(target))
ref = weakobj.objectref(obj, callback)
expected = set([id(ref)])
del obj
self.assertEqual(results, expected)
def test_WeakObjectCallback(self):
"""
Test that the weak object callback occurs as expected.
"""
obj = TestClass()
results = set()
def callback(target):
results.add(id(target))
ref = weakobj.objectref(obj, callback)
expected = set([id(ref)])
del obj
self.assertEqual(results, expected)
def getEventChannels(self):
return [weakobj.objectref(c) for c in self._eventChannels.itervalues()]
def getEventChannels(self):
return [weakobj.objectref(c) for c in self._eventChannels.itervalues()]
