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test_persistence.py
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test_persistence.py
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##############################################################################
#
# Copyright (c) 2011 Zope Foundation and Contributors.
# All Rights Reserved.
#
# This software is subject to the provisions of the Zope Public License,
# Version 2.1 (ZPL). A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE.
#
##############################################################################
import os
import unittest
import platform
import sys
py_impl = getattr(platform, 'python_implementation', lambda: None)
_is_pypy3 = py_impl() == 'PyPy' and sys.version_info[0] > 2
_is_jython = py_impl() == 'Jython'
#pylint: disable=R0904,W0212,E1101
class _Persistent_Base(object):
def _getTargetClass(self):
# concrete testcase classes must override
raise NotImplementedError()
def _makeCache(self, jar):
# concrete testcase classes must override
raise NotImplementedError()
def _makeOne(self, *args, **kw):
return self._getTargetClass()(*args, **kw)
def _makeJar(self):
from zope.interface import implementer
from persistent.interfaces import IPersistentDataManager
@implementer(IPersistentDataManager)
class _Jar(object):
_cache = None
# Set this to a value to have our `setstate`
# pass it through to the object's __setstate__
setstate_calls_object = None
# Set this to a value to have our `setstate`
# set the _p_serial of the object
setstate_sets_serial = None
def __init__(self):
self._loaded = []
self._registered = []
def setstate(self, obj):
self._loaded.append(obj._p_oid)
if self.setstate_calls_object is not None:
obj.__setstate__(self.setstate_calls_object)
if self.setstate_sets_serial is not None:
obj._p_serial = self.setstate_sets_serial
def register(self, obj):
self._registered.append(obj._p_oid)
jar = _Jar()
jar._cache = self._makeCache(jar)
return jar
def _makeBrokenJar(self):
from zope.interface import implementer
from persistent.interfaces import IPersistentDataManager
@implementer(IPersistentDataManager)
class _BrokenJar(object):
def __init__(self):
self.called = 0
def register(self,ob):
self.called += 1
raise NotImplementedError
def setstate(self,ob):
raise NotImplementedError
jar = _BrokenJar()
jar._cache = self._makeCache(jar)
return jar
def _makeOneWithJar(self, klass=None):
from persistent.timestamp import _makeOctets
OID = _makeOctets('\x01' * 8)
if klass is not None:
inst = klass()
else:
inst = self._makeOne()
jar = self._makeJar()
jar._cache.new_ghost(OID, inst) # assigns _p_jar, _p_oid
return inst, jar, OID
def test_class_conforms_to_IPersistent(self):
from zope.interface.verify import verifyClass
from persistent.interfaces import IPersistent
verifyClass(IPersistent, self._getTargetClass())
def test_instance_conforms_to_IPersistent(self):
from zope.interface.verify import verifyObject
from persistent.interfaces import IPersistent
verifyObject(IPersistent, self._makeOne())
def test_ctor(self):
from persistent.persistence import _INITIAL_SERIAL
inst = self._makeOne()
self.assertEqual(inst._p_jar, None)
self.assertEqual(inst._p_oid, None)
self.assertEqual(inst._p_serial, _INITIAL_SERIAL)
self.assertEqual(inst._p_changed, False)
self.assertEqual(inst._p_sticky, False)
self.assertEqual(inst._p_status, 'unsaved')
def test_del_jar_no_jar(self):
inst = self._makeOne()
del inst._p_jar # does not raise
self.assertEqual(inst._p_jar, None)
def test_del_jar_while_in_cache(self):
inst, _, OID = self._makeOneWithJar()
def _test():
del inst._p_jar
self.assertRaises(ValueError, _test)
def test_del_jar_like_ZODB_abort(self):
# When a ZODB connection aborts, it removes registered objects from
# the cache, deletes their jar, deletes their OID, and finally sets
# p_changed to false
inst, jar, OID = self._makeOneWithJar()
del jar._cache[OID]
del inst._p_jar
self.assertEqual(inst._p_jar, None)
def test_del_jar_of_inactive_object_that_has_no_state(self):
# If an object is ghosted, and we try to delete its
# jar, we shouldn't activate the object.
# Simulate a POSKeyError on _p_activate; this can happen aborting
# a transaction using ZEO
broken_jar = self._makeBrokenJar()
inst = self._makeOne()
inst._p_oid = 42
inst._p_jar = broken_jar
# make it inactive
inst._p_deactivate()
self.assertEqual(inst._p_status, "ghost")
# delete the jar; if we activated the object, the broken
# jar would raise NotImplementedError
del inst._p_jar
def test_assign_p_jar_w_new_jar(self):
inst, jar, OID = self._makeOneWithJar()
new_jar = self._makeJar()
try:
inst._p_jar = new_jar
except ValueError as e:
self.assertEqual(str(e), "can not change _p_jar of cached object")
else:
self.fail("Should raise ValueError")
def test_assign_p_jar_w_valid_jar(self):
jar = self._makeJar()
inst = self._makeOne()
inst._p_jar = jar
self.assertEqual(inst._p_status, 'saved')
self.assertTrue(inst._p_jar is jar)
inst._p_jar = jar # reassign only to same DM
def test_assign_p_jar_not_in_cache_allowed(self):
jar = self._makeJar()
inst = self._makeOne()
inst._p_jar = jar
# Both of these are allowed
inst._p_jar = self._makeJar()
inst._p_jar = None
self.assertEqual(inst._p_jar, None)
def test_assign_p_oid_w_invalid_oid(self):
inst, jar, OID = self._makeOneWithJar()
try:
inst._p_oid = object()
except ValueError as e:
self.assertEqual(str(e), 'can not change _p_oid of cached object')
else:
self.fail("Should raise value error")
def test_assign_p_oid_w_valid_oid(self):
from persistent.timestamp import _makeOctets
OID = _makeOctets('\x01' * 8)
inst = self._makeOne()
inst._p_oid = OID
self.assertEqual(inst._p_oid, OID)
inst._p_oid = OID # reassign only same OID
def test_assign_p_oid_w_new_oid_wo_jar(self):
from persistent.timestamp import _makeOctets
OID1 = _makeOctets('\x01' * 8)
OID2 = _makeOctets('\x02' * 8)
inst = self._makeOne()
inst._p_oid = OID1
inst._p_oid = OID2
self.assertEqual(inst._p_oid, OID2)
def test_assign_p_oid_w_None_wo_jar(self):
from persistent.timestamp import _makeOctets
OID1 = _makeOctets('\x01' * 8)
inst = self._makeOne()
inst._p_oid = OID1
inst._p_oid = None
self.assertEqual(inst._p_oid, None)
def test_assign_p_oid_w_new_oid_w_jar(self):
from persistent.timestamp import _makeOctets
inst, jar, OID = self._makeOneWithJar()
new_OID = _makeOctets('\x02' * 8)
def _test():
inst._p_oid = new_OID
self.assertRaises(ValueError, _test)
def test_assign_p_oid_not_in_cache_allowed(self):
jar = self._makeJar()
inst = self._makeOne()
inst._p_jar = jar
inst._p_oid = 1 # anything goes
inst._p_oid = 42
self.assertEqual(inst._p_oid, 42)
def test_delete_p_oid_wo_jar(self):
from persistent.timestamp import _makeOctets
OID = _makeOctets('\x01' * 8)
inst = self._makeOne()
inst._p_oid = OID
del inst._p_oid
self.assertEqual(inst._p_oid, None)
def test_delete_p_oid_w_jar(self):
inst, jar, OID = self._makeOneWithJar()
def _test():
del inst._p_oid
self.assertRaises(ValueError, _test)
def test_del_oid_like_ZODB_abort(self):
# When a ZODB connection aborts, it removes registered objects from
# the cache, deletes their jar, deletes their OID, and finally sets
# p_changed to false
inst, jar, OID = self._makeOneWithJar()
del jar._cache[OID]
del inst._p_oid
self.assertEqual(inst._p_oid, None)
def test_assign_p_serial_w_invalid_type(self):
inst = self._makeOne()
def _test():
inst._p_serial = object()
self.assertRaises(ValueError, _test)
def test_assign_p_serial_w_None(self):
inst = self._makeOne()
def _test():
inst._p_serial = None
self.assertRaises(ValueError, _test)
def test_assign_p_serial_too_short(self):
inst = self._makeOne()
def _test():
inst._p_serial = '\x01\x02\x03'
self.assertRaises(ValueError, _test)
def test_assign_p_serial_too_long(self):
inst = self._makeOne()
def _test():
inst._p_serial = '\x01\x02\x03' * 3
self.assertRaises(ValueError, _test)
def test_assign_p_serial_w_valid_serial(self):
from persistent.timestamp import _makeOctets
SERIAL = _makeOctets('\x01' * 8)
inst = self._makeOne()
inst._p_serial = SERIAL
self.assertEqual(inst._p_serial, SERIAL)
def test_delete_p_serial(self):
from persistent.timestamp import _makeOctets
from persistent.persistence import _INITIAL_SERIAL
SERIAL = _makeOctets('\x01' * 8)
inst = self._makeOne()
inst._p_serial = SERIAL
self.assertEqual(inst._p_serial, SERIAL)
del(inst._p_serial)
self.assertEqual(inst._p_serial, _INITIAL_SERIAL)
def test_query_p_changed_unsaved(self):
inst = self._makeOne()
self.assertEqual(inst._p_changed, False)
def test_query_p_changed_ghost(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_deactivate()
self.assertEqual(inst._p_changed, None)
def test_query_p_changed_saved(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_activate()
self.assertEqual(inst._p_changed, False)
def test_query_p_changed_changed(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_activate()
inst._p_changed = True
self.assertEqual(inst._p_changed, True)
def test_assign_p_changed_none_from_unsaved(self):
inst = self._makeOne()
inst._p_changed = None
self.assertEqual(inst._p_status, 'unsaved')
def test_assign_p_changed_true_from_unsaved(self):
inst = self._makeOne()
inst._p_changed = True
self.assertEqual(inst._p_status, 'unsaved')
def test_assign_p_changed_false_from_unsaved(self):
inst = self._makeOne()
inst._p_changed = False
self.assertEqual(inst._p_status, 'unsaved')
def test_assign_p_changed_none_from_ghost(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_deactivate()
inst._p_changed = None
self.assertEqual(inst._p_status, 'ghost')
self.assertEqual(list(jar._loaded), [])
self.assertEqual(list(jar._registered), [])
def test_assign_p_changed_true_from_ghost(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_deactivate()
inst._p_changed = True
self.assertEqual(inst._p_status, 'changed')
self.assertEqual(list(jar._loaded), [OID])
self.assertEqual(list(jar._registered), [OID])
def test_assign_p_changed_false_from_ghost(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_deactivate()
inst._p_changed = False
self.assertEqual(inst._p_status, 'ghost') # ??? this is what C does
self.assertEqual(list(jar._loaded), [])
self.assertEqual(list(jar._registered), [])
def test_assign_p_changed_none_from_saved(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_activate()
jar._loaded = []
inst._p_changed = None
self.assertEqual(inst._p_status, 'ghost')
self.assertEqual(list(jar._loaded), [])
self.assertEqual(list(jar._registered), [])
def test_assign_p_changed_true_from_saved(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_activate() # XXX
jar._loaded[:] = []
inst._p_changed = True
self.assertEqual(inst._p_status, 'changed')
self.assertEqual(list(jar._loaded), [])
self.assertEqual(list(jar._registered), [OID])
def test_assign_p_changed_false_from_saved(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_activate()
jar._loaded = []
inst._p_changed = False
self.assertEqual(inst._p_status, 'saved')
self.assertEqual(list(jar._loaded), [])
self.assertEqual(list(jar._registered), [])
def test_assign_p_changed_none_from_changed(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_activate()
inst._p_changed = True
jar._loaded = []
jar._registered = []
inst._p_changed = None
# assigning None is ignored when dirty
self.assertEqual(inst._p_status, 'changed')
self.assertEqual(list(jar._loaded), [])
self.assertEqual(list(jar._registered), [])
def test_assign_p_changed_true_from_changed(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_activate()
inst._p_changed = True
jar._loaded = []
jar._registered = []
inst._p_changed = True
self.assertEqual(inst._p_status, 'changed')
self.assertEqual(list(jar._loaded), [])
self.assertEqual(list(jar._registered), [])
def test_assign_p_changed_false_from_changed(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_activate()
inst._p_changed = True
jar._loaded = []
jar._registered = []
inst._p_changed = False
self.assertEqual(inst._p_status, 'saved')
self.assertEqual(list(jar._loaded), [])
self.assertEqual(list(jar._registered), [])
def test_assign_p_changed_none_when_sticky(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_activate() # XXX
inst._p_changed = False
inst._p_sticky = True
inst._p_changed = None
self.assertEqual(inst._p_status, 'sticky')
self.assertEqual(inst._p_changed, False)
self.assertEqual(inst._p_sticky, True)
def test_delete_p_changed_from_unsaved(self):
inst = self._makeOne()
del inst._p_changed
self.assertEqual(inst._p_status, 'unsaved')
def test_delete_p_changed_from_unsaved_w_dict(self):
class Derived(self._getTargetClass()):
pass
inst = Derived()
inst.foo = 'bar'
del inst._p_changed
self.assertEqual(inst._p_status, 'unsaved')
self.assertEqual(inst.foo, 'bar')
def test_delete_p_changed_from_ghost(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_deactivate()
del inst._p_changed
self.assertEqual(inst._p_status, 'ghost')
self.assertEqual(list(jar._loaded), [])
self.assertEqual(list(jar._registered), [])
def test_delete_p_changed_from_saved(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_activate()
jar._loaded = []
jar._registered = []
del inst._p_changed
self.assertEqual(inst._p_status, 'ghost')
self.assertEqual(list(jar._loaded), [])
self.assertEqual(list(jar._registered), [])
def test_delete_p_changed_from_changed(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_activate()
inst._p_changed = True
jar._loaded = []
jar._registered = []
del inst._p_changed
self.assertEqual(inst._p_status, 'ghost')
self.assertEqual(list(jar._loaded), [])
self.assertEqual(list(jar._registered), [])
def test_delete_p_changed_when_sticky(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_activate() # XXX
inst._p_changed = False
inst._p_sticky = True
del inst._p_changed
self.assertEqual(inst._p_status, 'ghost')
self.assertEqual(inst._p_changed, None)
self.assertEqual(inst._p_sticky, False)
def test_assign_p_sticky_true_when_ghost(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_deactivate() # XXX
def _test():
inst._p_sticky = True
self.assertRaises(ValueError, _test)
def test_assign_p_sticky_false_when_ghost(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_deactivate() # XXX
def _test():
inst._p_sticky = False
self.assertRaises(ValueError, _test)
def test_assign_p_sticky_true_non_ghost(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_activate() # XXX
inst._p_changed = False
inst._p_sticky = True
self.assertTrue(inst._p_sticky)
def test_assign_p_sticky_false_non_ghost(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_activate() # XXX
inst._p_changed = False
inst._p_sticky = False
self.assertFalse(inst._p_sticky)
def test__p_status_unsaved(self):
inst = self._makeOne()
self.assertEqual(inst._p_status, 'unsaved')
def test__p_status_ghost(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_deactivate()
self.assertEqual(inst._p_status, 'ghost')
def test__p_status_changed(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_changed = True
self.assertEqual(inst._p_status, 'changed')
def test__p_status_changed_sticky(self):
# 'sticky' is not a state, but a separate flag.
inst, jar, OID = self._makeOneWithJar()
inst._p_activate()
inst._p_changed = True
inst._p_sticky = True
self.assertEqual(inst._p_status, 'sticky')
def test__p_status_saved(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_activate() # XXX
inst._p_changed = False
self.assertEqual(inst._p_status, 'saved')
def test__p_status_saved_sticky(self):
# 'sticky' is not a state, but a separate flag.
inst, jar, OID = self._makeOneWithJar()
inst._p_activate()
inst._p_changed = False
inst._p_sticky = True
self.assertEqual(inst._p_status, 'sticky')
def test__p_mtime_no_serial(self):
inst = self._makeOne()
self.assertEqual(inst._p_mtime, None)
def test__p_mtime_w_serial(self):
from persistent.timestamp import TimeStamp
WHEN_TUPLE = (2011, 2, 15, 13, 33, 27.5)
ts = TimeStamp(*WHEN_TUPLE)
inst, jar, OID = self._makeOneWithJar()
inst._p_serial = ts.raw()
self.assertEqual(inst._p_mtime, ts.timeTime())
def test__p_mtime_activates_object(self):
# Accessing _p_mtime implicitly unghostifies the object
from persistent.timestamp import TimeStamp
WHEN_TUPLE = (2011, 2, 15, 13, 33, 27.5)
ts = TimeStamp(*WHEN_TUPLE)
inst, jar, OID = self._makeOneWithJar()
jar.setstate_sets_serial = ts.raw()
inst._p_invalidate()
self.assertEqual(inst._p_status, 'ghost')
self.assertEqual(inst._p_mtime, ts.timeTime())
self.assertEqual(inst._p_status, 'saved')
def test__p_state_unsaved(self):
inst = self._makeOne()
inst._p_changed = True
self.assertEqual(inst._p_state, 0)
def test__p_state_ghost(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_deactivate()
self.assertEqual(inst._p_state, -1)
def test__p_state_changed(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_changed = True
self.assertEqual(inst._p_state, 1)
def test__p_state_changed_sticky(self):
# 'sticky' is not a state, but a separate flag.
inst, jar, OID = self._makeOneWithJar()
inst._p_activate()
inst._p_changed = True
inst._p_sticky = True
self.assertEqual(inst._p_state, 2)
def test__p_state_saved(self):
inst, jar, OID = self._makeOneWithJar()
inst._p_activate() # XXX
inst._p_changed = False
self.assertEqual(inst._p_state, 0)
def test__p_state_saved_sticky(self):
# 'sticky' is not a state, but a separate flag.
inst, jar, OID = self._makeOneWithJar()
inst._p_activate()
inst._p_changed = False
inst._p_sticky = True
self.assertEqual(inst._p_state, 2)
def test_query_p_estimated_size_new(self):
inst = self._makeOne()
self.assertEqual(inst._p_estimated_size, 0)
def test_query_p_estimated_size_del(self):
inst = self._makeOne()
inst._p_estimated_size = 123
self.assertEqual(inst._p_estimated_size, 128)
del inst._p_estimated_size
self.assertEqual(inst._p_estimated_size, 0)
def test_assign_p_estimated_size_wrong_type(self):
inst = self._makeOne()
self.assertRaises(TypeError,
lambda : setattr(inst, '_p_estimated_size', None))
try:
long
except NameError:
pass
else:
self.assertRaises(TypeError,
lambda : setattr(inst, '_p_estimated_size', long(1)))
def test_assign_p_estimated_size_negative(self):
inst = self._makeOne()
def _test():
inst._p_estimated_size = -1
self.assertRaises(ValueError, _test)
def test_assign_p_estimated_size_small(self):
inst = self._makeOne()
inst._p_estimated_size = 123
self.assertEqual(inst._p_estimated_size, 128)
def test_assign_p_estimated_size_just_over_threshold(self):
inst = self._makeOne()
inst._p_estimated_size = 1073741697
self.assertEqual(inst._p_estimated_size, 16777215 * 64)
def test_assign_p_estimated_size_bigger(self):
inst = self._makeOne()
inst._p_estimated_size = 1073741697 * 2
self.assertEqual(inst._p_estimated_size, 16777215 * 64)
def test___getattribute___p__names(self):
NAMES = ['_p_jar',
'_p_oid',
'_p_changed',
'_p_serial',
'_p_state',
'_p_estimated_size',
'_p_sticky',
'_p_status',
]
inst, jar, OID = self._makeOneWithJar()
self._clearMRU(jar)
for name in NAMES:
getattr(inst, name)
self._checkMRU(jar, [])
# _p_mtime is special, it activates the object
getattr(inst, '_p_mtime')
self._checkMRU(jar, [OID])
def test___getattribute__special_name(self):
from persistent.persistence import SPECIAL_NAMES
inst, jar, OID = self._makeOneWithJar()
self._clearMRU(jar)
for name in SPECIAL_NAMES:
getattr(inst, name, None)
self._checkMRU(jar, [])
def test___getattribute__normal_name_from_unsaved(self):
class Derived(self._getTargetClass()):
normal = 'value'
inst = Derived()
self.assertEqual(getattr(inst, 'normal', None), 'value')
def test___getattribute__normal_name_from_ghost(self):
class Derived(self._getTargetClass()):
normal = 'value'
inst, jar, OID = self._makeOneWithJar(Derived)
inst._p_deactivate()
self._clearMRU(jar)
self.assertEqual(getattr(inst, 'normal', None), 'value')
self._checkMRU(jar, [OID])
def test___getattribute__normal_name_from_saved(self):
class Derived(self._getTargetClass()):
normal = 'value'
inst, jar, OID = self._makeOneWithJar(Derived)
inst._p_changed = False
self._clearMRU(jar)
self.assertEqual(getattr(inst, 'normal', None), 'value')
self._checkMRU(jar, [OID])
def test___getattribute__normal_name_from_changed(self):
class Derived(self._getTargetClass()):
normal = 'value'
inst, jar, OID = self._makeOneWithJar(Derived)
inst._p_changed = True
self._clearMRU(jar)
self.assertEqual(getattr(inst, 'normal', None), 'value')
self._checkMRU(jar, [OID])
def test___getattribute___non_cooperative(self):
# Getting attributes is NOT cooperative with the superclass.
# This comes from the C implementation and is maintained
# for backwards compatibility. (For example, Persistent and
# ExtensionClass.Base/Acquisition take special care to mix together.)
class Base(object):
def __getattribute__(self, name):
if name == 'magic':
return 42
return super(Base,self).__getattribute__(name)
self.assertEqual(getattr(Base(), 'magic'), 42)
class Derived(self._getTargetClass(), Base):
pass
self.assertRaises(AttributeError, getattr, Derived(), 'magic')
def test___setattr___p__names(self):
from persistent.timestamp import _makeOctets
SERIAL = _makeOctets('\x01' * 8)
inst, jar, OID = self._makeOneWithJar()
inst._p_activate()
NAMES = [('_p_jar', jar),
('_p_oid', OID),
('_p_changed', False),
('_p_serial', SERIAL),
('_p_estimated_size', 0),
('_p_sticky', False),
]
self._clearMRU(jar)
for name, value in NAMES:
setattr(inst, name, value)
self._checkMRU(jar, [])
def test___setattr___v__name(self):
class Derived(self._getTargetClass()):
pass
inst, jar, OID = self._makeOneWithJar(Derived)
self._clearMRU(jar)
inst._v_foo = 'bar'
self.assertEqual(inst._p_status, 'saved')
self._checkMRU(jar, [])
def test___setattr__normal_name_from_unsaved(self):
class Derived(self._getTargetClass()):
normal = 'before'
inst = Derived()
setattr(inst, 'normal', 'after')
self.assertEqual(getattr(inst, 'normal', None), 'after')
self.assertEqual(inst._p_status, 'unsaved')
def test___setattr__normal_name_from_ghost(self):
class Derived(self._getTargetClass()):
normal = 'before'
inst, jar, OID = self._makeOneWithJar(Derived)
inst._p_deactivate()
self._clearMRU(jar)
setattr(inst, 'normal', 'after')
self._checkMRU(jar, [OID])
self.assertEqual(jar._registered, [OID])
self.assertEqual(getattr(inst, 'normal', None), 'after')
self.assertEqual(inst._p_status, 'changed')
def test___setattr__normal_name_from_saved(self):
class Derived(self._getTargetClass()):
normal = 'before'
inst, jar, OID = self._makeOneWithJar(Derived)
inst._p_changed = False
self._clearMRU(jar)
setattr(inst, 'normal', 'after')
self._checkMRU(jar, [OID])
self.assertEqual(jar._registered, [OID])
self.assertEqual(getattr(inst, 'normal', None), 'after')
self.assertEqual(inst._p_status, 'changed')
def test___setattr__normal_name_from_changed(self):
class Derived(self._getTargetClass()):
normal = 'before'
inst, jar, OID = self._makeOneWithJar(Derived)
inst._p_changed = True
self._clearMRU(jar)
jar._registered = []
setattr(inst, 'normal', 'after')
self._checkMRU(jar, [OID])
self.assertEqual(jar._registered, [])
self.assertEqual(getattr(inst, 'normal', None), 'after')
self.assertEqual(inst._p_status, 'changed')
def test___delattr___p__names(self):
NAMES = ['_p_changed',
'_p_serial',
]
inst, jar, OID = self._makeOneWithJar()
self._clearMRU(jar)
jar._registered = []
for name in NAMES:
delattr(inst, name)
self._checkMRU(jar, [])
self.assertEqual(jar._registered, [])
def test___delattr__normal_name_from_unsaved(self):
class Derived(self._getTargetClass()):
normal = 'before'
def __init__(self):
self.__dict__['normal'] = 'after'
inst = Derived()
delattr(inst, 'normal')
self.assertEqual(getattr(inst, 'normal', None), 'before')
def test___delattr__normal_name_from_ghost(self):
class Derived(self._getTargetClass()):
normal = 'before'
inst, jar, OID = self._makeOneWithJar(Derived)
inst._p_deactivate()
self._clearMRU(jar)
jar._registered = []
def _test():
delattr(inst, 'normal')
self.assertRaises(AttributeError, _test)
self.assertEqual(inst._p_status, 'changed') # ??? this is what C does
self._checkMRU(jar, [OID])
self.assertEqual(jar._registered, [OID])
self.assertEqual(getattr(inst, 'normal', None), 'before')
def test___delattr__normal_name_from_saved(self):
class Derived(self._getTargetClass()):
normal = 'before'
def __init__(self):
self.__dict__['normal'] = 'after'
inst, jar, OID = self._makeOneWithJar(Derived)
inst._p_changed = False
self._clearMRU(jar)
jar._registered = []
delattr(inst, 'normal')
self._checkMRU(jar, [OID])
self.assertEqual(jar._registered, [OID])
self.assertEqual(getattr(inst, 'normal', None), 'before')
def test___delattr__normal_name_from_changed(self):
class Derived(self._getTargetClass()):
normal = 'before'
def __init__(self):
self.__dict__['normal'] = 'after'
inst, jar, OID = self._makeOneWithJar(Derived)
inst._p_changed = True
self._clearMRU(jar)
jar._registered = []
delattr(inst, 'normal')
self._checkMRU(jar, [OID])
self.assertEqual(jar._registered, [])
self.assertEqual(getattr(inst, 'normal', None), 'before')
def test___getstate__(self):
inst = self._makeOne()
self.assertEqual(inst.__getstate__(), None)
def test___getstate___derived_w_dict(self):
class Derived(self._getTargetClass()):
pass
inst = Derived()
inst.foo = 'bar'
inst._p_baz = 'bam'
inst._v_qux = 'spam'
self.assertEqual(inst.__getstate__(), {'foo': 'bar'})
def test___getstate___derived_w_slots(self):
class Derived(self._getTargetClass()):
__slots__ = ('foo', 'baz', '_p_baz', '_v_qux')
inst = Derived()
inst.foo = 'bar'
inst._p_baz = 'bam'
inst._v_qux = 'spam'
self.assertEqual(inst.__getstate__(), (None, {'foo': 'bar'}))
def test___getstate___derived_w_slots_in_base_and_derived(self):
class Base(self._getTargetClass()):
__slots__ = ('foo',)
class Derived(Base):
__slots__ = ('baz', 'qux',)
inst = Derived()
inst.foo = 'bar'
inst.baz = 'bam'
inst.qux = 'spam'
self.assertEqual(inst.__getstate__(),
(None, {'foo': 'bar', 'baz': 'bam', 'qux': 'spam'}))
def test___getstate___derived_w_slots_in_base_but_not_derived(self):
class Base(self._getTargetClass()):
__slots__ = ('foo',)
class Derived(Base):
pass
inst = Derived()
inst.foo = 'bar'
inst.baz = 'bam'
inst.qux = 'spam'
self.assertEqual(inst.__getstate__(),
({'baz': 'bam', 'qux': 'spam'}, {'foo': 'bar'}))
def test___setstate___empty(self):
inst = self._makeOne()
inst.__setstate__(None) # doesn't raise, but doesn't change anything
def test___setstate___nonempty(self):
from persistent.persistence import _INITIAL_SERIAL
inst = self._makeOne()
self.assertRaises((ValueError, TypeError),
inst.__setstate__, {'bogus': 1})
self.assertEqual(inst._p_jar, None)
self.assertEqual(inst._p_oid, None)
self.assertEqual(inst._p_serial, _INITIAL_SERIAL)
self.assertEqual(inst._p_changed, False)
self.assertEqual(inst._p_sticky, False)
def test___setstate___nonempty_derived_w_dict(self):
class Derived(self._getTargetClass()):
pass
inst = Derived()
inst.foo = 'bar'
inst.__setstate__({'baz': 'bam'})
self.assertEqual(inst.__dict__, {'baz': 'bam'})
def test___setstate___nonempty_derived_w_dict_w_two_keys(self):
class Derived(self._getTargetClass()):
pass
inst = Derived()
inst.foo = 'bar'
inst.__setstate__({'baz': 'bam', 'biz': 'boz'})
self.assertEqual(inst.__dict__, {'baz': 'bam', 'biz': 'boz'})
def test___setstate___derived_w_slots(self):
class Derived(self._getTargetClass()):
__slots__ = ('foo', '_p_baz', '_v_qux')
inst = Derived()
inst.__setstate__((None, {'foo': 'bar'}))
self.assertEqual(inst.foo, 'bar')
def test___setstate___derived_w_slots_in_base_classes(self):
class Base(self._getTargetClass()):
__slots__ = ('foo',)
class Derived(Base):
__slots__ = ('baz', 'qux',)
inst = Derived()
inst.__setstate__((None, {'foo': 'bar', 'baz': 'bam', 'qux': 'spam'}))
self.assertEqual(inst.foo, 'bar')
self.assertEqual(inst.baz, 'bam')
self.assertEqual(inst.qux, 'spam')
def test___setstate___derived_w_slots_in_base_but_not_derived(self):
class Base(self._getTargetClass()):
__slots__ = ('foo',)
class Derived(Base):
pass
inst = Derived()
inst.__setstate__(({'baz': 'bam', 'qux': 'spam'}, {'foo': 'bar'}))
self.assertEqual(inst.foo, 'bar')
self.assertEqual(inst.baz, 'bam')
self.assertEqual(inst.qux, 'spam')
if not _is_pypy3 and not _is_jython:
def test___setstate___interns_dict_keys(self):
class Derived(self._getTargetClass()):
pass
inst1 = Derived()
inst2 = Derived()
key1 = 'key'
key2 = 'ke'; key2 += 'y' # construct in a way that won't intern the literal
self.assertFalse(key1 is key2)
inst1.__setstate__({key1: 1})
inst2.__setstate__({key2: 2})
key1 = list(inst1.__dict__.keys())[0]
key2 = list(inst2.__dict__.keys())[0]
self.assertTrue(key1 is key2)
def test___setstate___doesnt_fail_on_non_string_keys(self):
class Derived(self._getTargetClass()):
pass
inst1 = Derived()
inst1.__setstate__({1: 2})
self.assertTrue(1 in inst1.__dict__)
class MyStr(str):
pass
mystr = MyStr('mystr')
inst1.__setstate__({mystr: 2})
self.assertTrue(mystr in inst1.__dict__)
def test___reduce__(self):
from persistent._compat import copy_reg
inst = self._makeOne()