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453 lines (376 loc) · 16.6 KB
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from _compat_pickle import (IMPORT_MAPPING, REVERSE_IMPORT_MAPPING,
NAME_MAPPING, REVERSE_NAME_MAPPING)
import builtins
import pickle
import io
import collections
import struct
import sys
import unittest
from test import support
from test.pickletester import AbstractUnpickleTests
from test.pickletester import AbstractPickleTests
from test.pickletester import AbstractPickleModuleTests
from test.pickletester import AbstractPersistentPicklerTests
from test.pickletester import AbstractIdentityPersistentPicklerTests
from test.pickletester import AbstractPicklerUnpicklerObjectTests
from test.pickletester import AbstractDispatchTableTests
from test.pickletester import BigmemPickleTests
try:
import _pickle
has_c_implementation = True
except ImportError:
has_c_implementation = False
class PyPickleTests(AbstractPickleModuleTests):
dump = staticmethod(pickle._dump)
dumps = staticmethod(pickle._dumps)
load = staticmethod(pickle._load)
loads = staticmethod(pickle._loads)
Pickler = pickle._Pickler
Unpickler = pickle._Unpickler
class PyUnpicklerTests(AbstractUnpickleTests):
unpickler = pickle._Unpickler
bad_stack_errors = (IndexError,)
truncated_errors = (pickle.UnpicklingError, EOFError,
AttributeError, ValueError,
struct.error, IndexError, ImportError)
def loads(self, buf, **kwds):
f = io.BytesIO(buf)
u = self.unpickler(f, **kwds)
return u.load()
class PyPicklerTests(AbstractPickleTests):
pickler = pickle._Pickler
unpickler = pickle._Unpickler
def dumps(self, arg, proto=None):
f = io.BytesIO()
p = self.pickler(f, proto)
p.dump(arg)
f.seek(0)
return bytes(f.read())
def loads(self, buf, **kwds):
f = io.BytesIO(buf)
u = self.unpickler(f, **kwds)
return u.load()
class InMemoryPickleTests(AbstractPickleTests, AbstractUnpickleTests,
BigmemPickleTests):
pickler = pickle._Pickler
unpickler = pickle._Unpickler
bad_stack_errors = (pickle.UnpicklingError, IndexError)
truncated_errors = (pickle.UnpicklingError, EOFError,
AttributeError, ValueError,
struct.error, IndexError, ImportError)
def dumps(self, arg, protocol=None):
return pickle.dumps(arg, protocol)
def loads(self, buf, **kwds):
return pickle.loads(buf, **kwds)
class PersistentPicklerUnpicklerMixin(object):
def dumps(self, arg, proto=None):
class PersPickler(self.pickler):
def persistent_id(subself, obj):
return self.persistent_id(obj)
f = io.BytesIO()
p = PersPickler(f, proto)
p.dump(arg)
return f.getvalue()
def loads(self, buf, **kwds):
class PersUnpickler(self.unpickler):
def persistent_load(subself, obj):
return self.persistent_load(obj)
f = io.BytesIO(buf)
u = PersUnpickler(f, **kwds)
return u.load()
class PyPersPicklerTests(AbstractPersistentPicklerTests,
PersistentPicklerUnpicklerMixin):
pickler = pickle._Pickler
unpickler = pickle._Unpickler
class PyIdPersPicklerTests(AbstractIdentityPersistentPicklerTests,
PersistentPicklerUnpicklerMixin):
pickler = pickle._Pickler
unpickler = pickle._Unpickler
class PyPicklerUnpicklerObjectTests(AbstractPicklerUnpicklerObjectTests):
pickler_class = pickle._Pickler
unpickler_class = pickle._Unpickler
class PyDispatchTableTests(AbstractDispatchTableTests):
pickler_class = pickle._Pickler
def get_dispatch_table(self):
return pickle.dispatch_table.copy()
class PyChainDispatchTableTests(AbstractDispatchTableTests):
pickler_class = pickle._Pickler
def get_dispatch_table(self):
return collections.ChainMap({}, pickle.dispatch_table)
if has_c_implementation:
class CPickleTests(AbstractPickleModuleTests):
from _pickle import dump, dumps, load, loads, Pickler, Unpickler
class CUnpicklerTests(PyUnpicklerTests):
unpickler = _pickle.Unpickler
bad_stack_errors = (pickle.UnpicklingError,)
truncated_errors = (pickle.UnpicklingError,)
class CPicklerTests(PyPicklerTests):
pickler = _pickle.Pickler
unpickler = _pickle.Unpickler
class CPersPicklerTests(PyPersPicklerTests):
pickler = _pickle.Pickler
unpickler = _pickle.Unpickler
class CIdPersPicklerTests(PyIdPersPicklerTests):
pickler = _pickle.Pickler
unpickler = _pickle.Unpickler
class CDumpPickle_LoadPickle(PyPicklerTests):
pickler = _pickle.Pickler
unpickler = pickle._Unpickler
class DumpPickle_CLoadPickle(PyPicklerTests):
pickler = pickle._Pickler
unpickler = _pickle.Unpickler
class CPicklerUnpicklerObjectTests(AbstractPicklerUnpicklerObjectTests):
pickler_class = _pickle.Pickler
unpickler_class = _pickle.Unpickler
def test_issue18339(self):
unpickler = self.unpickler_class(io.BytesIO())
with self.assertRaises(TypeError):
unpickler.memo = object
# used to cause a segfault
with self.assertRaises(ValueError):
unpickler.memo = {-1: None}
unpickler.memo = {1: None}
class CDispatchTableTests(AbstractDispatchTableTests):
pickler_class = pickle.Pickler
def get_dispatch_table(self):
return pickle.dispatch_table.copy()
class CChainDispatchTableTests(AbstractDispatchTableTests):
pickler_class = pickle.Pickler
def get_dispatch_table(self):
return collections.ChainMap({}, pickle.dispatch_table)
@support.cpython_only
class SizeofTests(unittest.TestCase):
check_sizeof = support.check_sizeof
def test_pickler(self):
basesize = support.calcobjsize('5P2n3i2n3iP')
p = _pickle.Pickler(io.BytesIO())
self.assertEqual(object.__sizeof__(p), basesize)
MT_size = struct.calcsize('3nP0n')
ME_size = struct.calcsize('Pn0P')
check = self.check_sizeof
check(p, basesize +
MT_size + 8 * ME_size + # Minimal memo table size.
sys.getsizeof(b'x'*4096)) # Minimal write buffer size.
for i in range(6):
p.dump(chr(i))
check(p, basesize +
MT_size + 32 * ME_size + # Size of memo table required to
# save references to 6 objects.
0) # Write buffer is cleared after every dump().
def test_unpickler(self):
basesize = support.calcobjsize('2Pn2P 2P2n2i5P 2P3n6P2n2i')
unpickler = _pickle.Unpickler
P = struct.calcsize('P') # Size of memo table entry.
n = struct.calcsize('n') # Size of mark table entry.
check = self.check_sizeof
for encoding in 'ASCII', 'UTF-16', 'latin-1':
for errors in 'strict', 'replace':
u = unpickler(io.BytesIO(),
encoding=encoding, errors=errors)
self.assertEqual(object.__sizeof__(u), basesize)
check(u, basesize +
32 * P + # Minimal memo table size.
len(encoding) + 1 + len(errors) + 1)
stdsize = basesize + len('ASCII') + 1 + len('strict') + 1
def check_unpickler(data, memo_size, marks_size):
dump = pickle.dumps(data)
u = unpickler(io.BytesIO(dump),
encoding='ASCII', errors='strict')
u.load()
check(u, stdsize + memo_size * P + marks_size * n)
check_unpickler(0, 32, 0)
# 20 is minimal non-empty mark stack size.
check_unpickler([0] * 100, 32, 20)
# 128 is memo table size required to save references to 100 objects.
check_unpickler([chr(i) for i in range(100)], 128, 20)
def recurse(deep):
data = 0
for i in range(deep):
data = [data, data]
return data
check_unpickler(recurse(0), 32, 0)
check_unpickler(recurse(1), 32, 20)
check_unpickler(recurse(20), 32, 58)
check_unpickler(recurse(50), 64, 58)
check_unpickler(recurse(100), 128, 134)
u = unpickler(io.BytesIO(pickle.dumps('a', 0)),
encoding='ASCII', errors='strict')
u.load()
check(u, stdsize + 32 * P + 2 + 1)
ALT_IMPORT_MAPPING = {
('_elementtree', 'xml.etree.ElementTree'),
('cPickle', 'pickle'),
('StringIO', 'io'),
('cStringIO', 'io'),
}
ALT_NAME_MAPPING = {
('__builtin__', 'basestring', 'builtins', 'str'),
('exceptions', 'StandardError', 'builtins', 'Exception'),
('UserDict', 'UserDict', 'collections', 'UserDict'),
('socket', '_socketobject', 'socket', 'SocketType'),
}
def mapping(module, name):
if (module, name) in NAME_MAPPING:
module, name = NAME_MAPPING[(module, name)]
elif module in IMPORT_MAPPING:
module = IMPORT_MAPPING[module]
return module, name
def reverse_mapping(module, name):
if (module, name) in REVERSE_NAME_MAPPING:
module, name = REVERSE_NAME_MAPPING[(module, name)]
elif module in REVERSE_IMPORT_MAPPING:
module = REVERSE_IMPORT_MAPPING[module]
return module, name
def getmodule(module):
try:
return sys.modules[module]
except KeyError:
try:
__import__(module)
except AttributeError as exc:
if support.verbose:
print("Can't import module %r: %s" % (module, exc))
raise ImportError
except ImportError as exc:
if support.verbose:
print(exc)
raise
return sys.modules[module]
def getattribute(module, name):
obj = getmodule(module)
for n in name.split('.'):
obj = getattr(obj, n)
return obj
def get_exceptions(mod):
for name in dir(mod):
attr = getattr(mod, name)
if isinstance(attr, type) and issubclass(attr, BaseException):
yield name, attr
class CompatPickleTests(unittest.TestCase):
def test_import(self):
modules = set(IMPORT_MAPPING.values())
modules |= set(REVERSE_IMPORT_MAPPING)
modules |= {module for module, name in REVERSE_NAME_MAPPING}
modules |= {module for module, name in NAME_MAPPING.values()}
for module in modules:
try:
getmodule(module)
except ImportError:
pass
def test_import_mapping(self):
for module3, module2 in REVERSE_IMPORT_MAPPING.items():
with self.subTest((module3, module2)):
try:
getmodule(module3)
except ImportError:
pass
if module3[:1] != '_':
self.assertIn(module2, IMPORT_MAPPING)
self.assertEqual(IMPORT_MAPPING[module2], module3)
def test_name_mapping(self):
for (module3, name3), (module2, name2) in REVERSE_NAME_MAPPING.items():
with self.subTest(((module3, name3), (module2, name2))):
if (module2, name2) == ('exceptions', 'OSError'):
attr = getattribute(module3, name3)
self.assertTrue(issubclass(attr, OSError))
elif (module2, name2) == ('exceptions', 'ImportError'):
attr = getattribute(module3, name3)
self.assertTrue(issubclass(attr, ImportError))
else:
module, name = mapping(module2, name2)
if module3[:1] != '_':
self.assertEqual((module, name), (module3, name3))
try:
attr = getattribute(module3, name3)
except ImportError:
pass
else:
self.assertEqual(getattribute(module, name), attr)
def test_reverse_import_mapping(self):
for module2, module3 in IMPORT_MAPPING.items():
with self.subTest((module2, module3)):
try:
getmodule(module3)
except ImportError as exc:
if support.verbose:
print(exc)
if ((module2, module3) not in ALT_IMPORT_MAPPING and
REVERSE_IMPORT_MAPPING.get(module3, None) != module2):
for (m3, n3), (m2, n2) in REVERSE_NAME_MAPPING.items():
if (module3, module2) == (m3, m2):
break
else:
self.fail('No reverse mapping from %r to %r' %
(module3, module2))
module = REVERSE_IMPORT_MAPPING.get(module3, module3)
module = IMPORT_MAPPING.get(module, module)
self.assertEqual(module, module3)
def test_reverse_name_mapping(self):
for (module2, name2), (module3, name3) in NAME_MAPPING.items():
with self.subTest(((module2, name2), (module3, name3))):
try:
attr = getattribute(module3, name3)
except ImportError:
pass
module, name = reverse_mapping(module3, name3)
if (module2, name2, module3, name3) not in ALT_NAME_MAPPING:
self.assertEqual((module, name), (module2, name2))
module, name = mapping(module, name)
self.assertEqual((module, name), (module3, name3))
def test_exceptions(self):
self.assertEqual(mapping('exceptions', 'StandardError'),
('builtins', 'Exception'))
self.assertEqual(mapping('exceptions', 'Exception'),
('builtins', 'Exception'))
self.assertEqual(reverse_mapping('builtins', 'Exception'),
('exceptions', 'Exception'))
self.assertEqual(mapping('exceptions', 'OSError'),
('builtins', 'OSError'))
self.assertEqual(reverse_mapping('builtins', 'OSError'),
('exceptions', 'OSError'))
for name, exc in get_exceptions(builtins):
with self.subTest(name):
if exc in (BlockingIOError,
ResourceWarning,
StopAsyncIteration,
RecursionError):
continue
if exc is not OSError and issubclass(exc, OSError):
self.assertEqual(reverse_mapping('builtins', name),
('exceptions', 'OSError'))
elif exc is not ImportError and issubclass(exc, ImportError):
self.assertEqual(reverse_mapping('builtins', name),
('exceptions', 'ImportError'))
self.assertEqual(mapping('exceptions', name),
('exceptions', name))
else:
self.assertEqual(reverse_mapping('builtins', name),
('exceptions', name))
self.assertEqual(mapping('exceptions', name),
('builtins', name))
def test_multiprocessing_exceptions(self):
module = support.import_module('multiprocessing.context')
for name, exc in get_exceptions(module):
with self.subTest(name):
self.assertEqual(reverse_mapping('multiprocessing.context', name),
('multiprocessing', name))
self.assertEqual(mapping('multiprocessing', name),
('multiprocessing.context', name))
def test_main():
tests = [PyPickleTests, PyUnpicklerTests, PyPicklerTests,
PyPersPicklerTests, PyIdPersPicklerTests,
PyDispatchTableTests, PyChainDispatchTableTests,
CompatPickleTests]
if has_c_implementation:
tests.extend([CPickleTests, CUnpicklerTests, CPicklerTests,
CPersPicklerTests, CIdPersPicklerTests,
CDumpPickle_LoadPickle, DumpPickle_CLoadPickle,
PyPicklerUnpicklerObjectTests,
CPicklerUnpicklerObjectTests,
CDispatchTableTests, CChainDispatchTableTests,
InMemoryPickleTests, SizeofTests])
support.run_unittest(*tests)
support.run_doctest(pickle)
if __name__ == "__main__":
test_main()