Python源码示例：weakref.getweakrefs()
示例1
def test_getweakrefs(self):
o = C()
ref1 = weakref.ref(o, self.callback)
ref2 = weakref.ref(o, self.callback)
del ref1
self.assertEqual(weakref.getweakrefs(o), [ref2],
"list of refs does not match")
o = C()
ref1 = weakref.ref(o, self.callback)
ref2 = weakref.ref(o, self.callback)
del ref2
self.assertEqual(weakref.getweakrefs(o), [ref1],
"list of refs does not match")
del ref1
self.assertEqual(weakref.getweakrefs(o), [],
"list of refs not cleared")
# assumes ints do not support weakrefs
self.assertEqual(weakref.getweakrefs(1), [],
"list of refs does not match for int")
示例2
def test_subclass_refs_dont_replace_standard_refs(self):
class MyRef(weakref.ref):
pass
o = Object(42)
r1 = MyRef(o)
r2 = weakref.ref(o)
self.assertIsNot(r1, r2)
self.assertEqual(weakref.getweakrefs(o), [r2, r1])
self.assertEqual(weakref.getweakrefcount(o), 2)
r3 = MyRef(o)
self.assertEqual(weakref.getweakrefcount(o), 3)
refs = weakref.getweakrefs(o)
self.assertEqual(len(refs), 3)
self.assertIs(r2, refs[0])
self.assertIn(r1, refs[1:])
self.assertIn(r3, refs[1:])
示例3
def test_getweakrefs(self):
o = C()
ref1 = weakref.ref(o, self.callback)
ref2 = weakref.ref(o, self.callback)
del ref1
self.assertTrue(weakref.getweakrefs(o) == [ref2],
"list of refs does not match")
o = C()
ref1 = weakref.ref(o, self.callback)
ref2 = weakref.ref(o, self.callback)
del ref2
self.assertTrue(weakref.getweakrefs(o) == [ref1],
"list of refs does not match")
del ref1
self.assertTrue(weakref.getweakrefs(o) == [],
"list of refs not cleared")
# assumes ints do not support weakrefs
self.assertTrue(weakref.getweakrefs(1) == [],
"list of refs does not match for int")
示例4
def test_subclass_refs_dont_replace_standard_refs(self):
class MyRef(weakref.ref):
pass
o = Object(42)
r1 = MyRef(o)
r2 = weakref.ref(o)
self.assertTrue(r1 is not r2)
self.assertEqual(weakref.getweakrefs(o), [r2, r1])
self.assertEqual(weakref.getweakrefcount(o), 2)
r3 = MyRef(o)
self.assertEqual(weakref.getweakrefcount(o), 3)
refs = weakref.getweakrefs(o)
self.assertEqual(len(refs), 3)
self.assertTrue(r2 is refs[0])
self.assertIn(r1, refs[1:])
self.assertIn(r3, refs[1:])
示例5
def test_getweakrefs(self):
o = C()
ref1 = weakref.ref(o, self.callback)
ref2 = weakref.ref(o, self.callback)
del ref1
self.assertEqual(weakref.getweakrefs(o), [ref2],
"list of refs does not match")
o = C()
ref1 = weakref.ref(o, self.callback)
ref2 = weakref.ref(o, self.callback)
del ref2
self.assertEqual(weakref.getweakrefs(o), [ref1],
"list of refs does not match")
del ref1
self.assertEqual(weakref.getweakrefs(o), [],
"list of refs not cleared")
# assumes ints do not support weakrefs
self.assertEqual(weakref.getweakrefs(1), [],
"list of refs does not match for int")
示例6
def test_subclass_refs_dont_replace_standard_refs(self):
class MyRef(weakref.ref):
pass
o = Object(42)
r1 = MyRef(o)
r2 = weakref.ref(o)
self.assertIsNot(r1, r2)
self.assertEqual(weakref.getweakrefs(o), [r2, r1])
self.assertEqual(weakref.getweakrefcount(o), 2)
r3 = MyRef(o)
self.assertEqual(weakref.getweakrefcount(o), 3)
refs = weakref.getweakrefs(o)
self.assertEqual(len(refs), 3)
self.assertIs(r2, refs[0])
self.assertIn(r1, refs[1:])
self.assertIn(r3, refs[1:])
示例7
def test_getweakrefs(self):
o = C()
ref1 = weakref.ref(o, self.callback)
ref2 = weakref.ref(o, self.callback)
del ref1
self.assertEqual(weakref.getweakrefs(o), [ref2],
"list of refs does not match")
o = C()
ref1 = weakref.ref(o, self.callback)
ref2 = weakref.ref(o, self.callback)
del ref2
self.assertEqual(weakref.getweakrefs(o), [ref1],
"list of refs does not match")
del ref1
self.assertEqual(weakref.getweakrefs(o), [],
"list of refs not cleared")
# assumes ints do not support weakrefs
self.assertEqual(weakref.getweakrefs(1), [],
"list of refs does not match for int")
示例8
def test_subclass_refs_dont_replace_standard_refs(self):
class MyRef(weakref.ref):
pass
o = Object(42)
r1 = MyRef(o)
r2 = weakref.ref(o)
self.assertIsNot(r1, r2)
self.assertEqual(weakref.getweakrefs(o), [r2, r1])
self.assertEqual(weakref.getweakrefcount(o), 2)
r3 = MyRef(o)
self.assertEqual(weakref.getweakrefcount(o), 3)
refs = weakref.getweakrefs(o)
self.assertEqual(len(refs), 3)
self.assertIs(r2, refs[0])
self.assertIn(r1, refs[1:])
self.assertIn(r3, refs[1:])
示例9
def test_getweakrefs(self):
o = C()
ref1 = weakref.ref(o, self.callback)
ref2 = weakref.ref(o, self.callback)
del ref1
self.assertEqual(weakref.getweakrefs(o), [ref2],
"list of refs does not match")
o = C()
ref1 = weakref.ref(o, self.callback)
ref2 = weakref.ref(o, self.callback)
del ref2
self.assertEqual(weakref.getweakrefs(o), [ref1],
"list of refs does not match")
del ref1
self.assertEqual(weakref.getweakrefs(o), [],
"list of refs not cleared")
# assumes ints do not support weakrefs
self.assertEqual(weakref.getweakrefs(1), [],
"list of refs does not match for int")
示例10
def test_subclass_refs_dont_replace_standard_refs(self):
class MyRef(weakref.ref):
pass
o = Object(42)
r1 = MyRef(o)
r2 = weakref.ref(o)
self.assertIsNot(r1, r2)
self.assertEqual(weakref.getweakrefs(o), [r2, r1])
self.assertEqual(weakref.getweakrefcount(o), 2)
r3 = MyRef(o)
self.assertEqual(weakref.getweakrefcount(o), 3)
refs = weakref.getweakrefs(o)
self.assertEqual(len(refs), 3)
self.assertIs(r2, refs[0])
self.assertIn(r1, refs[1:])
self.assertIn(r3, refs[1:])
示例11
def test_getweakrefs(self):
o = C()
ref1 = weakref.ref(o, self.callback)
ref2 = weakref.ref(o, self.callback)
del ref1
self.assertEqual(weakref.getweakrefs(o), [ref2],
"list of refs does not match")
o = C()
ref1 = weakref.ref(o, self.callback)
ref2 = weakref.ref(o, self.callback)
del ref2
self.assertEqual(weakref.getweakrefs(o), [ref1],
"list of refs does not match")
del ref1
self.assertEqual(weakref.getweakrefs(o), [],
"list of refs not cleared")
# assumes ints do not support weakrefs
self.assertEqual(weakref.getweakrefs(1), [],
"list of refs does not match for int")
示例12
def test_subclass_refs_dont_replace_standard_refs(self):
class MyRef(weakref.ref):
pass
o = Object(42)
r1 = MyRef(o)
r2 = weakref.ref(o)
self.assertIsNot(r1, r2)
self.assertEqual(weakref.getweakrefs(o), [r2, r1])
self.assertEqual(weakref.getweakrefcount(o), 2)
r3 = MyRef(o)
self.assertEqual(weakref.getweakrefcount(o), 3)
refs = weakref.getweakrefs(o)
self.assertEqual(len(refs), 3)
self.assertIs(r2, refs[0])
self.assertIn(r1, refs[1:])
self.assertIn(r3, refs[1:])
示例13
def test_getweakrefs(self):
o = C()
ref1 = weakref.ref(o, self.callback)
ref2 = weakref.ref(o, self.callback)
del ref1
self.assertEqual(weakref.getweakrefs(o), [ref2],
"list of refs does not match")
o = C()
ref1 = weakref.ref(o, self.callback)
ref2 = weakref.ref(o, self.callback)
del ref2
self.assertEqual(weakref.getweakrefs(o), [ref1],
"list of refs does not match")
del ref1
self.assertEqual(weakref.getweakrefs(o), [],
"list of refs not cleared")
# assumes ints do not support weakrefs
self.assertEqual(weakref.getweakrefs(1), [],
"list of refs does not match for int")
示例14
def test_subclass_refs_dont_replace_standard_refs(self):
class MyRef(weakref.ref):
pass
o = Object(42)
r1 = MyRef(o)
r2 = weakref.ref(o)
self.assertIsNot(r1, r2)
self.assertEqual(weakref.getweakrefs(o), [r2, r1])
self.assertEqual(weakref.getweakrefcount(o), 2)
r3 = MyRef(o)
self.assertEqual(weakref.getweakrefcount(o), 3)
refs = weakref.getweakrefs(o)
self.assertEqual(len(refs), 3)
self.assertIs(r2, refs[0])
self.assertIn(r1, refs[1:])
self.assertIn(r3, refs[1:])
示例15
def test_getweakrefs(self):
o = C()
ref1 = weakref.ref(o, self.callback)
ref2 = weakref.ref(o, self.callback)
del ref1
extra_collect()
self.assert_(weakref.getweakrefs(o) == [ref2],
"list of refs does not match")
o = C()
ref1 = weakref.ref(o, self.callback)
ref2 = weakref.ref(o, self.callback)
del ref2
extra_collect()
self.assert_(weakref.getweakrefs(o) == [ref1],
"list of refs does not match")
del ref1
extra_collect()
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")
示例16
def test_subclass_refs_dont_replace_standard_refs(self):
class MyRef(weakref.ref):
pass
o = Object(42)
r1 = MyRef(o)
r2 = weakref.ref(o)
self.assert_(r1 is not r2)
self.assertEqual(weakref.getweakrefs(o), [r2, r1])
self.assertEqual(weakref.getweakrefcount(o), 2)
r3 = MyRef(o)
self.assertEqual(weakref.getweakrefcount(o), 3)
refs = weakref.getweakrefs(o)
self.assertEqual(len(refs), 3)
self.assert_(r2 is refs[0])
self.assert_(r1 in refs[1:])
self.assert_(r3 in refs[1:])
示例17
def test_getweakrefs(self):
o = C()
ref1 = weakref.ref(o, self.callback)
ref2 = weakref.ref(o, self.callback)
del ref1
gc.collect()
self.assertTrue(weakref.getweakrefs(o) == [ref2],
"list of refs does not match")
o = C()
ref1 = weakref.ref(o, self.callback)
ref2 = weakref.ref(o, self.callback)
del ref2
gc.collect()
self.assertTrue(weakref.getweakrefs(o) == [ref1],
"list of refs does not match")
del ref1
gc.collect()
self.assertTrue(weakref.getweakrefs(o) == [],
"list of refs not cleared")
# assumes ints do not support weakrefs
self.assertTrue(weakref.getweakrefs(1) == [],
"list of refs does not match for int")
示例18
def test_subclass_refs_dont_replace_standard_refs(self):
class MyRef(weakref.ref):
pass
o = Object(42)
r1 = MyRef(o)
r2 = weakref.ref(o)
self.assertTrue(r1 is not r2)
self.assertEqual(weakref.getweakrefs(o), [r2, r1])
self.assertEqual(weakref.getweakrefcount(o), 2)
r3 = MyRef(o)
self.assertEqual(weakref.getweakrefcount(o), 3)
refs = weakref.getweakrefs(o)
self.assertEqual(len(refs), 3)
self.assertIn(r1, refs)
self.assertIn(r2, refs)
self.assertIn(r3, refs)
示例19
def test_getweakrefs(self):
o = C()
ref1 = weakref.ref(o, self.callback)
ref2 = weakref.ref(o, self.callback)
del ref1
gc.collect()
self.assertTrue(weakref.getweakrefs(o) == [ref2],
"list of refs does not match")
o = C()
ref1 = weakref.ref(o, self.callback)
ref2 = weakref.ref(o, self.callback)
del ref2
gc.collect()
self.assertTrue(weakref.getweakrefs(o) == [ref1],
"list of refs does not match")
del ref1
gc.collect()
self.assertTrue(weakref.getweakrefs(o) == [],
"list of refs not cleared")
# assumes ints do not support weakrefs
self.assertTrue(weakref.getweakrefs(1) == [],
"list of refs does not match for int")
示例20
def test_subclass_refs_dont_replace_standard_refs(self):
class MyRef(weakref.ref):
pass
o = Object(42)
r1 = MyRef(o)
r2 = weakref.ref(o)
self.assertTrue(r1 is not r2)
self.assertEqual(weakref.getweakrefs(o), [r2, r1])
self.assertEqual(weakref.getweakrefcount(o), 2)
r3 = MyRef(o)
self.assertEqual(weakref.getweakrefcount(o), 3)
refs = weakref.getweakrefs(o)
self.assertEqual(len(refs), 3)
self.assertIn(r1, refs)
self.assertIn(r2, refs)
self.assertIn(r3, refs)
示例21
def test_subclass_refs_dont_conflate_callbacks(self):
class MyRef(weakref.ref):
pass
o = Object(42)
r1 = MyRef(o, id)
r2 = MyRef(o, str)
self.assertIsNot(r1, r2)
refs = weakref.getweakrefs(o)
self.assertIn(r1, refs)
self.assertIn(r2, refs)
示例22
def test_subclass_refs_dont_conflate_callbacks(self):
class MyRef(weakref.ref):
pass
o = Object(42)
r1 = MyRef(o, id)
r2 = MyRef(o, str)
self.assertTrue(r1 is not r2)
refs = weakref.getweakrefs(o)
self.assertIn(r1, refs)
self.assertIn(r2, refs)
示例23
def test_subclass_refs_dont_conflate_callbacks(self):
class MyRef(weakref.ref):
pass
o = Object(42)
r1 = MyRef(o, id)
r2 = MyRef(o, str)
self.assertIsNot(r1, r2)
refs = weakref.getweakrefs(o)
self.assertIn(r1, refs)
self.assertIn(r2, refs)
示例24
def test_subclass_refs_dont_conflate_callbacks(self):
class MyRef(weakref.ref):
pass
o = Object(42)
r1 = MyRef(o, id)
r2 = MyRef(o, str)
self.assertIsNot(r1, r2)
refs = weakref.getweakrefs(o)
self.assertIn(r1, refs)
self.assertIn(r2, refs)
示例25
def test_subclass_refs_dont_conflate_callbacks(self):
class MyRef(weakref.ref):
pass
o = Object(42)
r1 = MyRef(o, id)
r2 = MyRef(o, str)
self.assertIsNot(r1, r2)
refs = weakref.getweakrefs(o)
self.assertIn(r1, refs)
self.assertIn(r2, refs)
示例26
def test_subclass_refs_dont_conflate_callbacks(self):
class MyRef(weakref.ref):
pass
o = Object(42)
r1 = MyRef(o, id)
r2 = MyRef(o, str)
self.assertIsNot(r1, r2)
refs = weakref.getweakrefs(o)
self.assertIn(r1, refs)
self.assertIn(r2, refs)
示例27
def test_subclass_refs_dont_conflate_callbacks(self):
class MyRef(weakref.ref):
pass
o = Object(42)
r1 = MyRef(o, id)
r2 = MyRef(o, str)
self.assertIsNot(r1, r2)
refs = weakref.getweakrefs(o)
self.assertIn(r1, refs)
self.assertIn(r2, refs)
示例28
def test_subclass_refs_dont_conflate_callbacks(self):
class MyRef(weakref.ref):
pass
o = Object(42)
r1 = MyRef(o, id)
r2 = MyRef(o, str)
self.assert_(r1 is not r2)
refs = weakref.getweakrefs(o)
self.assert_(r1 in refs)
self.assert_(r2 in refs)
示例29
def test_id_after_resurrection(self):
l = ["ab"]
rd = ResurrectionDummy()
rd.toResurrect = l
savedId = id(l)
l = None
rd = None
runGC() #needed for Jython etc, even though no cyclic trash appears
self.assertEqual(id(ResurrectionDummy.resurrected), savedId)
del ResurrectionDummy.resurrected
#todo: Check these test regarding to CPython behavior
# def test_weakref_consistency_after_self_resurrection(self):
# #fails in CPython
# rd = SelfResurrectionDummy()
# wref = weakref.ref(rd)
# self.assertIn(wref, weakref.getweakrefs(rd))
# rd = None
# runGC() #needed for Jython etc, even though no cyclic trash appears
# self.asserIn(wref, weakref.getweakrefs(SelfResurrectionDummy.resurrected))
# for wref2 in weakref.getweakrefs(SelfResurrectionDummy.resurrected):
# self.assertIs(wref2(), SelfResurrectionDummy.resurrected)
# del SelfResurrectionDummy.resurrected
#
# def test_weakref_consistency_after_resurrection(self):
# l = ReferentDummy("ab")
# rd = ResurrectionDummy()
# rd.toResurrect = l
# wref = weakref.ref(l)
# self.assertIn(wref, weakref.getweakrefs(l))
# l = None
# rd = None
# runGC() #needed for Jython etc, even though no cyclic trash appears
# self.asserIn(wref, weakref.getweakrefs(ResurrectionDummy.resurrected))
# for wref2 in weakref.getweakrefs(ResurrectionDummy.resurrected):
# self.assertIs(wref2(), ResurrectionDummy.resurrected)
# del ResurrectionDummy.resurrected
示例30
def test_subclass_refs_dont_conflate_callbacks(self):
class MyRef(weakref.ref):
pass
o = Object(42)
r1 = MyRef(o, id)
r2 = MyRef(o, str)
self.assertTrue(r1 is not r2)
refs = list(weakref.getweakrefs(o))
self.assertIn(r1, refs)
self.assertIn(r2, refs)
