def testWorksWithUnboundMethods(self):
self.SetupTestAttributes()
meth = self.C.f
rf = WeakMethodRef(meth)
pf = WeakMethodProxy(meth)
assert meth(self.c) == 1
assert rf()(self.c) == 1
assert pf(self.c) == 1
assert not rf.is_dead()
assert not pf.is_dead()
def testHash(self):
self.SetupTestAttributes()
r = WeakMethodRef(self.c.f)
r2 = WeakMethodRef(self.c.f)
assert r == r2
h = hash(r)
assert hash(r) == hash(r2)
del self.c
assert r() is None
assert hash(r) == h
def testRepr(self):
self.SetupTestAttributes()
r = WeakMethodRef(self.c.f)
assert str(r)[:33] == '<WeakMethodRef to C.f for object '
def Foo():
'Never called'
r = WeakMethodRef(Foo)
assert str(r) == '<WeakMethodRef to Foo>'
def testWorksWithUnboundMethods(self):
self.SetupTestAttributes()
meth = self.C.f
rf = WeakMethodRef(meth)
pf = WeakMethodProxy(meth)
assert meth(self.c) == 1
assert rf()(self.c) == 1
assert pf(self.c) == 1
assert not rf.is_dead()
assert not pf.is_dead()
def testEq(self):
self.SetupTestAttributes()
rf1 = WeakMethodRef(self.c.f)
rf2 = WeakMethodRef(self.c.f)
assert rf1 == rf2
rf3 = WeakMethodRef(self.d.f)
assert rf1 != rf3
del self.c
assert rf1.is_dead()
assert rf2.is_dead()
assert rf1 == rf2
def testWorksWithFunctions(self):
self.SetupTestAttributes()
def foo(y):
return y + 1
rf = WeakMethodRef(foo)
pf = WeakMethodProxy(foo)
assert foo(1) == 2
assert rf()(1) == 2
assert pf(1) == 2
assert not rf.is_dead()
assert not pf.is_dead()
def testWorksWithFunctions(self):
self.SetupTestAttributes()
def foo(y):
return y + 1
rf = WeakMethodRef(foo)
pf = WeakMethodProxy(foo)
assert foo(1) == 2
assert rf()(1) == 2
assert pf(1) == 2
assert not rf.is_dead()
assert not pf.is_dead()
def testDies(self):
self.SetupTestAttributes()
rf = WeakMethodRef(self.c.f)
pf = WeakMethodProxy(self.c.f)
assert not rf.is_dead()
assert not pf.is_dead()
assert rf()() == 1
assert pf(2) == 3
self.c = None
assert rf.is_dead()
assert pf.is_dead()
assert rf() == None
with pytest.raises(ReferenceError):
pf()
def testDies(self):
self.SetupTestAttributes()
rf = WeakMethodRef(self.c.f)
pf = WeakMethodProxy(self.c.f)
assert not rf.is_dead()
assert not pf.is_dead()
assert rf()() == 1
assert pf(2) == 3
self.c = None
assert rf.is_dead()
assert pf.is_dead()
assert rf() == None
with pytest.raises(ReferenceError):
pf()
def __init__(self, method):
self._before = None
self._after = None
self._method = WeakMethodRef(method)
self._name = method.__name__
# Maintaining the OriginalMethod() interface that clients expect.
self.OriginalMethod = self._method
def testRefcount(self):
self.SetupTestAttributes()
self.CustomAssertEqual(sys.getrefcount(
self.c), 2) # 2: one in self, and one as argument to getrefcount()
cf = self.c.f
self.CustomAssertEqual(sys.getrefcount(self.c),
3) # 3: as above, plus cf
rf = WeakMethodRef(self.c.f)
pf = WeakMethodProxy(self.c.f)
self.CustomAssertEqual(sys.getrefcount(self.c), 3)
del cf
self.CustomAssertEqual(sys.getrefcount(self.c), 2)
rf2 = WeakMethodRef(self.c.f)
self.CustomAssertEqual(sys.getrefcount(self.c), 2)
del rf
del rf2
del pf
self.CustomAssertEqual(sys.getrefcount(self.c), 2)
def testEq(self):
self.SetupTestAttributes()
rf1 = WeakMethodRef(self.c.f)
rf2 = WeakMethodRef(self.c.f)
assert rf1 == rf2
rf3 = WeakMethodRef(self.d.f)
assert rf1 != rf3
del self.c
assert rf1.is_dead()
assert rf2.is_dead()
assert rf1 == rf2
def _CreateBeforeOrAfter(method, callback, sender_as_parameter, before=True):
wrapper = WrapForCallback(method)
original_method = wrapper.OriginalMethod()
extra_args = []
if sender_as_parameter:
im_self = original_method.im_self
extra_args.append(weakref.ref(im_self))
# this is not garbage collected directly when added to the wrapper (which will create a WeakMethodRef to it)
# because it's not a real method, so, WeakMethodRef will actually maintain a strong reference to it.
callback = _CallbackWrapper(WeakMethodRef(callback))
if before:
wrapper.AppendBefore(callback, extra_args)
else:
wrapper.AppendAfter(callback, extra_args)
return wrapper
def testKeyReusedAfterDead(self, monkeypatch):
self._gotten_key = False
def GetKey(*args, **kwargs):
self._gotten_key = True
return 1
monkeypatch.setattr(callback.Callback, '_GetKey', GetKey)
def AfterMethod(*args):
'Not called!'
def AfterMethodB(*args):
'Not called!'
c = callback.Callback()
c.Register(AfterMethod)
self._gotten_key = False
assert not c.Contains(AfterMethodB)
assert c.Contains(AfterMethod)
assert self._gotten_key
# As we made _GetKey return always the same, this will make it remove one and add the
# other one, so, the contains will have to check if they're actually the same or not.
c.Register(AfterMethodB)
self._gotten_key = False
assert c.Contains(AfterMethodB)
assert not c.Contains(AfterMethod)
assert self._gotten_key
class A(object):
def __init__(self):
self._a = 0
def GetA(self):
return self._a
def SetA(self, value):
self._a = value
a = property(GetA, SetA)
a = A()
# Coverage exercise
assert a.a == 0
a.a = 10
assert a.a == 10
# If registering a bound, it doesn't contain the unbound
c.Register(a.SetA)
assert not c.Contains(AfterMethodB)
assert not c.Contains(A.SetA)
assert c.Contains(a.SetA)
# But if registering an unbound, it contains the bound
c.Register(A.SetA)
assert not c.Contains(AfterMethodB)
assert c.Contains(A.SetA)
assert c.Contains(a.SetA)
c.Register(a.SetA)
assert len(c) == 1
del a
assert not c.Contains(AfterMethodB)
assert len(c) == 0
a = A()
c.Register(_CallbackWrapper(WeakMethodRef(a.SetA)))
assert len(c) == 1
del a
assert not c.Contains(AfterMethodB)
assert len(c) == 0
def __init__(self, cached_method=None):
# REMARKS: Use WeakMethodRef to avoid cyclic reference.
self._method = WeakMethodRef(cached_method)
self.enabled = True
self.ResetCounters()
