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- add tests that exercise fixes for the PyWeakref_NewRef() and

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PyWeakref_NewProxy() constructors from the C API
- elaborate the getweakrefcount() and getweakrefs() tests slightly
This commit is contained in:
Fred Drake 2004-02-03 19:56:46 +00:00
parent 6a2852cd48
commit ea2adc9c80
1 changed files with 41 additions and 0 deletions
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41
Lib/test/test_weakref.py
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@ -183,6 +183,38 @@ class ReferencesTestCase(TestBase):
self.assertEqual(L3[:5], p3[:5])
self.assertEqual(L3[2:5], p3[2:5])
# The PyWeakref_* C API is documented as allowing either NULL or
# None as the value for the callback, where either means "no
# callback". The "no callback" ref and proxy objects are supposed
# to be shared so long as they exist by all callers so long as
# they are active. In Python 2.3.3 and earlier, this guaranttee
# was not honored, and was broken in different ways for
# PyWeakref_NewRef() and PyWeakref_NewProxy(). (Two tests.)
def test_shared_ref_without_callback(self):
self.check_shared_without_callback(weakref.ref)
def test_shared_proxy_without_callback(self):
self.check_shared_without_callback(weakref.proxy)
def check_shared_without_callback(self, makeref):
o = Object(1)
p1 = makeref(o, None)
p2 = makeref(o, None)
self.assert_(p1 is p2, "both callbacks were None in the C API")
del p1, p2
p1 = makeref(o)
p2 = makeref(o, None)
self.assert_(p1 is p2, "callbacks were NULL, None in the C API")
del p1, p2
p1 = makeref(o)
p2 = makeref(o)
self.assert_(p1 is p2, "both callbacks were NULL in the C API")
del p1, p2
p1 = makeref(o, None)
p2 = makeref(o)
self.assert_(p1 is p2, "callbacks were None, NULL in the C API")
def test_callable_proxy(self):
o = Callable()
ref1 = weakref.proxy(o)
@ -249,6 +281,11 @@ class ReferencesTestCase(TestBase):
self.assert_(weakref.getweakrefcount(o) == 4,
"got wrong number of weak reference objects")
del ref1, ref2, proxy1, proxy2
self.assert_(weakref.getweakrefcount(o) == 0,
"weak reference objects not unlinked from"
" referent when discarded.")
# assumes ints do not support weakrefs
self.assert_(weakref.getweakrefcount(1) == 0,
"got wrong number of weak reference objects for int")
@ -268,6 +305,10 @@ class ReferencesTestCase(TestBase):
self.assert_(weakref.getweakrefs(o) == [ref1],
"list of refs does not match")
del ref1
self.assert_(weakref.getweakrefs(o) == [],
"list of refs not cleared")
# assumes ints do not support weakrefs
self.assert_(weakref.getweakrefs(1) == [],
"list of refs does not match for int")