mirror of
https://github.com/python/cpython.git
synced 2024-11-24 18:34:43 +08:00
530 lines
17 KiB
Python
530 lines
17 KiB
Python
import sys
|
|
import unittest
|
|
import UserList
|
|
import weakref
|
|
|
|
from test import test_support
|
|
|
|
|
|
class C:
|
|
def method(self):
|
|
pass
|
|
|
|
|
|
class Callable:
|
|
bar = None
|
|
|
|
def __call__(self, x):
|
|
self.bar = x
|
|
|
|
|
|
def create_function():
|
|
def f(): pass
|
|
return f
|
|
|
|
def create_bound_method():
|
|
return C().method
|
|
|
|
def create_unbound_method():
|
|
return C.method
|
|
|
|
|
|
class TestBase(unittest.TestCase):
|
|
|
|
def setUp(self):
|
|
self.cbcalled = 0
|
|
|
|
def callback(self, ref):
|
|
self.cbcalled += 1
|
|
|
|
|
|
class ReferencesTestCase(TestBase):
|
|
|
|
def test_basic_ref(self):
|
|
self.check_basic_ref(C)
|
|
self.check_basic_ref(create_function)
|
|
self.check_basic_ref(create_bound_method)
|
|
self.check_basic_ref(create_unbound_method)
|
|
|
|
# Just make sure the tp_repr handler doesn't raise an exception.
|
|
# Live reference:
|
|
o = C()
|
|
wr = weakref.ref(o)
|
|
`wr`
|
|
# Dead reference:
|
|
del o
|
|
`wr`
|
|
|
|
def test_basic_callback(self):
|
|
self.check_basic_callback(C)
|
|
self.check_basic_callback(create_function)
|
|
self.check_basic_callback(create_bound_method)
|
|
self.check_basic_callback(create_unbound_method)
|
|
|
|
def test_multiple_callbacks(self):
|
|
o = C()
|
|
ref1 = weakref.ref(o, self.callback)
|
|
ref2 = weakref.ref(o, self.callback)
|
|
del o
|
|
self.assert_(ref1() is None,
|
|
"expected reference to be invalidated")
|
|
self.assert_(ref2() is None,
|
|
"expected reference to be invalidated")
|
|
self.assert_(self.cbcalled == 2,
|
|
"callback not called the right number of times")
|
|
|
|
def test_multiple_selfref_callbacks(self):
|
|
# Make sure all references are invalidated before callbacks are called
|
|
#
|
|
# What's important here is that we're using the first
|
|
# reference in the callback invoked on the second reference
|
|
# (the most recently created ref is cleaned up first). This
|
|
# tests that all references to the object are invalidated
|
|
# before any of the callbacks are invoked, so that we only
|
|
# have one invocation of _weakref.c:cleanup_helper() active
|
|
# for a particular object at a time.
|
|
#
|
|
def callback(object, self=self):
|
|
self.ref()
|
|
c = C()
|
|
self.ref = weakref.ref(c, callback)
|
|
ref1 = weakref.ref(c, callback)
|
|
del c
|
|
|
|
def test_proxy_ref(self):
|
|
o = C()
|
|
o.bar = 1
|
|
ref1 = weakref.proxy(o, self.callback)
|
|
ref2 = weakref.proxy(o, self.callback)
|
|
del o
|
|
|
|
def check(proxy):
|
|
proxy.bar
|
|
|
|
self.assertRaises(weakref.ReferenceError, check, ref1)
|
|
self.assertRaises(weakref.ReferenceError, check, ref2)
|
|
self.assert_(self.cbcalled == 2)
|
|
|
|
def check_basic_ref(self, factory):
|
|
o = factory()
|
|
ref = weakref.ref(o)
|
|
self.assert_(ref() is not None,
|
|
"weak reference to live object should be live")
|
|
o2 = ref()
|
|
self.assert_(o is o2,
|
|
"<ref>() should return original object if live")
|
|
|
|
def check_basic_callback(self, factory):
|
|
self.cbcalled = 0
|
|
o = factory()
|
|
ref = weakref.ref(o, self.callback)
|
|
del o
|
|
self.assert_(self.cbcalled == 1,
|
|
"callback did not properly set 'cbcalled'")
|
|
self.assert_(ref() is None,
|
|
"ref2 should be dead after deleting object reference")
|
|
|
|
def test_ref_reuse(self):
|
|
o = C()
|
|
ref1 = weakref.ref(o)
|
|
# create a proxy to make sure that there's an intervening creation
|
|
# between these two; it should make no difference
|
|
proxy = weakref.proxy(o)
|
|
ref2 = weakref.ref(o)
|
|
self.assert_(ref1 is ref2,
|
|
"reference object w/out callback should be re-used")
|
|
|
|
o = C()
|
|
proxy = weakref.proxy(o)
|
|
ref1 = weakref.ref(o)
|
|
ref2 = weakref.ref(o)
|
|
self.assert_(ref1 is ref2,
|
|
"reference object w/out callback should be re-used")
|
|
self.assert_(weakref.getweakrefcount(o) == 2,
|
|
"wrong weak ref count for object")
|
|
del proxy
|
|
self.assert_(weakref.getweakrefcount(o) == 1,
|
|
"wrong weak ref count for object after deleting proxy")
|
|
|
|
def test_proxy_reuse(self):
|
|
o = C()
|
|
proxy1 = weakref.proxy(o)
|
|
ref = weakref.ref(o)
|
|
proxy2 = weakref.proxy(o)
|
|
self.assert_(proxy1 is proxy2,
|
|
"proxy object w/out callback should have been re-used")
|
|
|
|
def test_basic_proxy(self):
|
|
o = C()
|
|
self.check_proxy(o, weakref.proxy(o))
|
|
|
|
L = UserList.UserList()
|
|
p = weakref.proxy(L)
|
|
self.failIf(p, "proxy for empty UserList should be false")
|
|
p.append(12)
|
|
self.assertEqual(len(L), 1)
|
|
self.failUnless(p, "proxy for non-empty UserList should be true")
|
|
p[:] = [2, 3]
|
|
self.assertEqual(len(L), 2)
|
|
self.assertEqual(len(p), 2)
|
|
self.failUnless(3 in p, "proxy didn't support __contains__() properly")
|
|
p[1] = 5
|
|
self.assertEqual(L[1], 5)
|
|
self.assertEqual(p[1], 5)
|
|
L2 = UserList.UserList(L)
|
|
p2 = weakref.proxy(L2)
|
|
self.assertEqual(p, p2)
|
|
## self.assertEqual(`L2`, `p2`)
|
|
L3 = UserList.UserList(range(10))
|
|
p3 = weakref.proxy(L3)
|
|
self.assertEqual(L3[:], p3[:])
|
|
self.assertEqual(L3[5:], p3[5:])
|
|
self.assertEqual(L3[:5], p3[:5])
|
|
self.assertEqual(L3[2:5], p3[2:5])
|
|
|
|
def test_callable_proxy(self):
|
|
o = Callable()
|
|
ref1 = weakref.proxy(o)
|
|
|
|
self.check_proxy(o, ref1)
|
|
|
|
self.assert_(type(ref1) is weakref.CallableProxyType,
|
|
"proxy is not of callable type")
|
|
ref1('twinkies!')
|
|
self.assert_(o.bar == 'twinkies!',
|
|
"call through proxy not passed through to original")
|
|
ref1(x='Splat.')
|
|
self.assert_(o.bar == 'Splat.',
|
|
"call through proxy not passed through to original")
|
|
|
|
# expect due to too few args
|
|
self.assertRaises(TypeError, ref1)
|
|
|
|
# expect due to too many args
|
|
self.assertRaises(TypeError, ref1, 1, 2, 3)
|
|
|
|
def check_proxy(self, o, proxy):
|
|
o.foo = 1
|
|
self.assert_(proxy.foo == 1,
|
|
"proxy does not reflect attribute addition")
|
|
o.foo = 2
|
|
self.assert_(proxy.foo == 2,
|
|
"proxy does not reflect attribute modification")
|
|
del o.foo
|
|
self.assert_(not hasattr(proxy, 'foo'),
|
|
"proxy does not reflect attribute removal")
|
|
|
|
proxy.foo = 1
|
|
self.assert_(o.foo == 1,
|
|
"object does not reflect attribute addition via proxy")
|
|
proxy.foo = 2
|
|
self.assert_(
|
|
o.foo == 2,
|
|
"object does not reflect attribute modification via proxy")
|
|
del proxy.foo
|
|
self.assert_(not hasattr(o, 'foo'),
|
|
"object does not reflect attribute removal via proxy")
|
|
|
|
def test_getweakrefcount(self):
|
|
o = C()
|
|
ref1 = weakref.ref(o)
|
|
ref2 = weakref.ref(o, self.callback)
|
|
self.assert_(weakref.getweakrefcount(o) == 2,
|
|
"got wrong number of weak reference objects")
|
|
|
|
proxy1 = weakref.proxy(o)
|
|
proxy2 = weakref.proxy(o, self.callback)
|
|
self.assert_(weakref.getweakrefcount(o) == 4,
|
|
"got wrong number of weak reference objects")
|
|
|
|
def test_getweakrefs(self):
|
|
o = C()
|
|
ref1 = weakref.ref(o, self.callback)
|
|
ref2 = weakref.ref(o, self.callback)
|
|
del ref1
|
|
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
|
|
self.assert_(weakref.getweakrefs(o) == [ref1],
|
|
"list of refs does not match")
|
|
|
|
def test_newstyle_number_ops(self):
|
|
class F(float):
|
|
pass
|
|
f = F(2.0)
|
|
p = weakref.proxy(f)
|
|
self.assert_(p + 1.0 == 3.0)
|
|
self.assert_(1.0 + p == 3.0) # this used to SEGV
|
|
|
|
def test_callbacks_protected(self):
|
|
# Callbacks protected from already-set exceptions?
|
|
# Regression test for SF bug #478534.
|
|
class BogusError(Exception):
|
|
pass
|
|
data = {}
|
|
def remove(k):
|
|
del data[k]
|
|
def encapsulate():
|
|
f = lambda : ()
|
|
data[weakref.ref(f, remove)] = None
|
|
raise BogusError
|
|
try:
|
|
encapsulate()
|
|
except BogusError:
|
|
pass
|
|
else:
|
|
self.fail("exception not properly restored")
|
|
try:
|
|
encapsulate()
|
|
except BogusError:
|
|
pass
|
|
else:
|
|
self.fail("exception not properly restored")
|
|
|
|
|
|
class Object:
|
|
def __init__(self, arg):
|
|
self.arg = arg
|
|
def __repr__(self):
|
|
return "<Object %r>" % self.arg
|
|
|
|
|
|
class MappingTestCase(TestBase):
|
|
|
|
COUNT = 10
|
|
|
|
def test_weak_values(self):
|
|
#
|
|
# This exercises d.copy(), d.items(), d[], del d[], len(d).
|
|
#
|
|
dict, objects = self.make_weak_valued_dict()
|
|
for o in objects:
|
|
self.assert_(weakref.getweakrefcount(o) == 1,
|
|
"wrong number of weak references to %r!" % o)
|
|
self.assert_(o is dict[o.arg],
|
|
"wrong object returned by weak dict!")
|
|
items1 = dict.items()
|
|
items2 = dict.copy().items()
|
|
items1.sort()
|
|
items2.sort()
|
|
self.assert_(items1 == items2,
|
|
"cloning of weak-valued dictionary did not work!")
|
|
del items1, items2
|
|
self.assert_(len(dict) == self.COUNT)
|
|
del objects[0]
|
|
self.assert_(len(dict) == (self.COUNT - 1),
|
|
"deleting object did not cause dictionary update")
|
|
del objects, o
|
|
self.assert_(len(dict) == 0,
|
|
"deleting the values did not clear the dictionary")
|
|
# regression on SF bug #447152:
|
|
dict = weakref.WeakValueDictionary()
|
|
self.assertRaises(KeyError, dict.__getitem__, 1)
|
|
dict[2] = C()
|
|
self.assertRaises(KeyError, dict.__getitem__, 2)
|
|
|
|
def test_weak_keys(self):
|
|
#
|
|
# This exercises d.copy(), d.items(), d[] = v, d[], del d[],
|
|
# len(d), d.has_key().
|
|
#
|
|
dict, objects = self.make_weak_keyed_dict()
|
|
for o in objects:
|
|
self.assert_(weakref.getweakrefcount(o) == 1,
|
|
"wrong number of weak references to %r!" % o)
|
|
self.assert_(o.arg is dict[o],
|
|
"wrong object returned by weak dict!")
|
|
items1 = dict.items()
|
|
items2 = dict.copy().items()
|
|
items1.sort()
|
|
items2.sort()
|
|
self.assert_(items1 == items2,
|
|
"cloning of weak-keyed dictionary did not work!")
|
|
del items1, items2
|
|
self.assert_(len(dict) == self.COUNT)
|
|
del objects[0]
|
|
self.assert_(len(dict) == (self.COUNT - 1),
|
|
"deleting object did not cause dictionary update")
|
|
del objects, o
|
|
self.assert_(len(dict) == 0,
|
|
"deleting the keys did not clear the dictionary")
|
|
o = Object(42)
|
|
dict[o] = "What is the meaning of the universe?"
|
|
self.assert_(dict.has_key(o))
|
|
self.assert_(not dict.has_key(34))
|
|
|
|
def test_weak_keyed_iters(self):
|
|
dict, objects = self.make_weak_keyed_dict()
|
|
self.check_iters(dict)
|
|
|
|
def test_weak_valued_iters(self):
|
|
dict, objects = self.make_weak_valued_dict()
|
|
self.check_iters(dict)
|
|
|
|
def check_iters(self, dict):
|
|
# item iterator:
|
|
items = dict.items()
|
|
for item in dict.iteritems():
|
|
items.remove(item)
|
|
self.assert_(len(items) == 0, "iteritems() did not touch all items")
|
|
|
|
# key iterator, via __iter__():
|
|
keys = dict.keys()
|
|
for k in dict:
|
|
keys.remove(k)
|
|
self.assert_(len(keys) == 0, "__iter__() did not touch all keys")
|
|
|
|
# key iterator, via iterkeys():
|
|
keys = dict.keys()
|
|
for k in dict.iterkeys():
|
|
keys.remove(k)
|
|
self.assert_(len(keys) == 0, "iterkeys() did not touch all keys")
|
|
|
|
# value iterator:
|
|
values = dict.values()
|
|
for v in dict.itervalues():
|
|
values.remove(v)
|
|
self.assert_(len(values) == 0, "itervalues() did not touch all values")
|
|
|
|
def test_make_weak_keyed_dict_from_dict(self):
|
|
o = Object(3)
|
|
dict = weakref.WeakKeyDictionary({o:364})
|
|
self.assert_(dict[o] == 364)
|
|
|
|
def test_make_weak_keyed_dict_from_weak_keyed_dict(self):
|
|
o = Object(3)
|
|
dict = weakref.WeakKeyDictionary({o:364})
|
|
dict2 = weakref.WeakKeyDictionary(dict)
|
|
self.assert_(dict[o] == 364)
|
|
|
|
def make_weak_keyed_dict(self):
|
|
dict = weakref.WeakKeyDictionary()
|
|
objects = map(Object, range(self.COUNT))
|
|
for o in objects:
|
|
dict[o] = o.arg
|
|
return dict, objects
|
|
|
|
def make_weak_valued_dict(self):
|
|
dict = weakref.WeakValueDictionary()
|
|
objects = map(Object, range(self.COUNT))
|
|
for o in objects:
|
|
dict[o.arg] = o
|
|
return dict, objects
|
|
|
|
def check_popitem(self, klass, key1, value1, key2, value2):
|
|
weakdict = klass()
|
|
weakdict[key1] = value1
|
|
weakdict[key2] = value2
|
|
self.assert_(len(weakdict) == 2)
|
|
k, v = weakdict.popitem()
|
|
self.assert_(len(weakdict) == 1)
|
|
if k is key1:
|
|
self.assert_(v is value1)
|
|
else:
|
|
self.assert_(v is value2)
|
|
k, v = weakdict.popitem()
|
|
self.assert_(len(weakdict) == 0)
|
|
if k is key1:
|
|
self.assert_(v is value1)
|
|
else:
|
|
self.assert_(v is value2)
|
|
|
|
def test_weak_valued_dict_popitem(self):
|
|
self.check_popitem(weakref.WeakValueDictionary,
|
|
"key1", C(), "key2", C())
|
|
|
|
def test_weak_keyed_dict_popitem(self):
|
|
self.check_popitem(weakref.WeakKeyDictionary,
|
|
C(), "value 1", C(), "value 2")
|
|
|
|
def check_setdefault(self, klass, key, value1, value2):
|
|
self.assert_(value1 is not value2,
|
|
"invalid test"
|
|
" -- value parameters must be distinct objects")
|
|
weakdict = klass()
|
|
o = weakdict.setdefault(key, value1)
|
|
self.assert_(o is value1)
|
|
self.assert_(weakdict.has_key(key))
|
|
self.assert_(weakdict.get(key) is value1)
|
|
self.assert_(weakdict[key] is value1)
|
|
|
|
o = weakdict.setdefault(key, value2)
|
|
self.assert_(o is value1)
|
|
self.assert_(weakdict.has_key(key))
|
|
self.assert_(weakdict.get(key) is value1)
|
|
self.assert_(weakdict[key] is value1)
|
|
|
|
def test_weak_valued_dict_setdefault(self):
|
|
self.check_setdefault(weakref.WeakValueDictionary,
|
|
"key", C(), C())
|
|
|
|
def test_weak_keyed_dict_setdefault(self):
|
|
self.check_setdefault(weakref.WeakKeyDictionary,
|
|
C(), "value 1", "value 2")
|
|
|
|
def check_update(self, klass, dict):
|
|
#
|
|
# This exercises d.update(), len(d), d.keys(), d.has_key(),
|
|
# d.get(), d[].
|
|
#
|
|
weakdict = klass()
|
|
weakdict.update(dict)
|
|
self.assert_(len(weakdict) == len(dict))
|
|
for k in weakdict.keys():
|
|
self.assert_(dict.has_key(k),
|
|
"mysterious new key appeared in weak dict")
|
|
v = dict.get(k)
|
|
self.assert_(v is weakdict[k])
|
|
self.assert_(v is weakdict.get(k))
|
|
for k in dict.keys():
|
|
self.assert_(weakdict.has_key(k),
|
|
"original key disappeared in weak dict")
|
|
v = dict[k]
|
|
self.assert_(v is weakdict[k])
|
|
self.assert_(v is weakdict.get(k))
|
|
|
|
def test_weak_valued_dict_update(self):
|
|
self.check_update(weakref.WeakValueDictionary,
|
|
{1: C(), 'a': C(), C(): C()})
|
|
|
|
def test_weak_keyed_dict_update(self):
|
|
self.check_update(weakref.WeakKeyDictionary,
|
|
{C(): 1, C(): 2, C(): 3})
|
|
|
|
def test_weak_keyed_delitem(self):
|
|
d = weakref.WeakKeyDictionary()
|
|
o1 = Object('1')
|
|
o2 = Object('2')
|
|
d[o1] = 'something'
|
|
d[o2] = 'something'
|
|
self.assert_(len(d) == 2)
|
|
del d[o1]
|
|
self.assert_(len(d) == 1)
|
|
self.assert_(d.keys() == [o2])
|
|
|
|
def test_weak_valued_delitem(self):
|
|
d = weakref.WeakValueDictionary()
|
|
o1 = Object('1')
|
|
o2 = Object('2')
|
|
d['something'] = o1
|
|
d['something else'] = o2
|
|
self.assert_(len(d) == 2)
|
|
del d['something']
|
|
self.assert_(len(d) == 1)
|
|
self.assert_(d.items() == [('something else', o2)])
|
|
|
|
|
|
def test_main():
|
|
suite = unittest.TestSuite()
|
|
suite.addTest(unittest.makeSuite(ReferencesTestCase))
|
|
suite.addTest(unittest.makeSuite(MappingTestCase))
|
|
test_support.run_suite(suite)
|
|
|
|
|
|
if __name__ == "__main__":
|
|
test_main()
|