/usr/lib/python2.7/dist-packages/transaction/tests/test__manager.py is in python-transaction 1.4.3-3.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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#
# Copyright (c) 2012 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 unittest
class TransactionManagerTests(unittest.TestCase):
def _getTargetClass(self):
from transaction import TransactionManager
return TransactionManager
def _makeOne(self):
return self._getTargetClass()()
def _makePopulated(self):
mgr = self._makeOne()
sub1 = DataObject(mgr)
sub2 = DataObject(mgr)
sub3 = DataObject(mgr)
nosub1 = DataObject(mgr, nost=1)
return mgr, sub1, sub2, sub3, nosub1
def test_ctor(self):
tm = self._makeOne()
self.assertTrue(tm._txn is None)
self.assertEqual(len(tm._synchs), 0)
def test_begin_wo_existing_txn_wo_synchs(self):
from transaction._transaction import Transaction
tm = self._makeOne()
tm.begin()
self.assertTrue(isinstance(tm._txn, Transaction))
def test_begin_wo_existing_txn_w_synchs(self):
from transaction._transaction import Transaction
tm = self._makeOne()
synch = DummySynch()
tm.registerSynch(synch)
tm.begin()
self.assertTrue(isinstance(tm._txn, Transaction))
self.assertTrue(tm._txn in synch._txns)
def test_begin_w_existing_txn(self):
class Existing(object):
_aborted = False
def abort(self):
self._aborted = True
tm = self._makeOne()
tm._txn = txn = Existing()
tm.begin()
self.assertFalse(tm._txn is txn)
self.assertTrue(txn._aborted)
def test_get_wo_existing_txn(self):
from transaction._transaction import Transaction
tm = self._makeOne()
txn = tm.get()
self.assertTrue(isinstance(txn, Transaction))
def test_get_w_existing_txn(self):
class Existing(object):
_aborted = False
def abort(self):
self._aborted = True
tm = self._makeOne()
tm._txn = txn = Existing()
self.assertTrue(tm.get() is txn)
def test_free_w_other_txn(self):
from transaction._transaction import Transaction
tm = self._makeOne()
txn = Transaction()
tm.begin()
self.assertRaises(ValueError, tm.free, txn)
def test_free_w_existing_txn(self):
class Existing(object):
_aborted = False
def abort(self):
self._aborted = True
tm = self._makeOne()
tm._txn = txn = Existing()
tm.free(txn)
self.assertTrue(tm._txn is None)
def test_registerSynch(self):
tm = self._makeOne()
synch = DummySynch()
tm.registerSynch(synch)
self.assertEqual(len(tm._synchs), 1)
self.assertTrue(synch in tm._synchs)
def test_unregisterSynch(self):
tm = self._makeOne()
synch1 = DummySynch()
synch2 = DummySynch()
tm.registerSynch(synch1)
tm.registerSynch(synch2)
tm.unregisterSynch(synch1)
self.assertEqual(len(tm._synchs), 1)
self.assertFalse(synch1 in tm._synchs)
self.assertTrue(synch2 in tm._synchs)
def test_isDoomed_wo_existing_txn(self):
tm = self._makeOne()
self.assertFalse(tm.isDoomed())
tm._txn.doom()
self.assertTrue(tm.isDoomed())
def test_isDoomed_w_existing_txn(self):
class Existing(object):
_doomed = False
def isDoomed(self):
return self._doomed
tm = self._makeOne()
tm._txn = txn = Existing()
self.assertFalse(tm.isDoomed())
txn._doomed = True
self.assertTrue(tm.isDoomed())
def test_doom(self):
tm = self._makeOne()
txn = tm.get()
self.assertFalse(txn.isDoomed())
tm.doom()
self.assertTrue(txn.isDoomed())
self.assertTrue(tm.isDoomed())
def test_commit_w_existing_txn(self):
class Existing(object):
_committed = False
def commit(self):
self._committed = True
tm = self._makeOne()
tm._txn = txn = Existing()
tm.commit()
self.assertTrue(txn._committed)
def test_abort_w_existing_txn(self):
class Existing(object):
_aborted = False
def abort(self):
self._aborted = True
tm = self._makeOne()
tm._txn = txn = Existing()
tm.abort()
self.assertTrue(txn._aborted)
def test_as_context_manager_wo_error(self):
class _Test(object):
_committed = False
_aborted = False
def commit(self):
self._committed = True
def abort(self):
self._aborted = True
tm = self._makeOne()
with tm:
tm._txn = txn = _Test()
self.assertTrue(txn._committed)
self.assertFalse(txn._aborted)
def test_as_context_manager_w_error(self):
class _Test(object):
_committed = False
_aborted = False
def commit(self):
self._committed = True
def abort(self):
self._aborted = True
tm = self._makeOne()
try:
with tm:
tm._txn = txn = _Test()
1/0
except ZeroDivisionError:
pass
self.assertFalse(txn._committed)
self.assertTrue(txn._aborted)
def test_savepoint_default(self):
class _Test(object):
_sp = None
def savepoint(self, optimistic):
self._sp = optimistic
tm = self._makeOne()
tm._txn = txn = _Test()
tm.savepoint()
self.assertFalse(txn._sp)
def test_savepoint_explicit(self):
class _Test(object):
_sp = None
def savepoint(self, optimistic):
self._sp = optimistic
tm = self._makeOne()
tm._txn = txn = _Test()
tm.savepoint(True)
self.assertTrue(txn._sp)
def test_attempts_w_invalid_count(self):
tm = self._makeOne()
self.assertRaises(ValueError, list, tm.attempts(0))
self.assertRaises(ValueError, list, tm.attempts(-1))
self.assertRaises(ValueError, list, tm.attempts(-10))
def test_attempts_w_valid_count(self):
tm = self._makeOne()
found = list(tm.attempts(1))
self.assertEqual(len(found), 1)
self.assertTrue(found[0] is tm)
def test_attempts_w_default_count(self):
from transaction._manager import Attempt
tm = self._makeOne()
found = list(tm.attempts())
self.assertEqual(len(found), 3)
for attempt in found[:-1]:
self.assertTrue(isinstance(attempt, Attempt))
self.assertTrue(attempt.manager is tm)
self.assertTrue(found[-1] is tm)
def test__retryable_w_transient_error(self):
from transaction.interfaces import TransientError
tm = self._makeOne()
self.assertTrue(tm._retryable(TransientError, object()))
def test__retryable_w_transient_subclass(self):
from transaction.interfaces import TransientError
class _Derived(TransientError):
pass
tm = self._makeOne()
self.assertTrue(tm._retryable(_Derived, object()))
def test__retryable_w_normal_exception_no_resources(self):
tm = self._makeOne()
self.assertFalse(tm._retryable(Exception, object()))
def test__retryable_w_normal_exception_w_resource_voting_yes(self):
class _Resource(object):
def should_retry(self, err):
return True
tm = self._makeOne()
tm.get()._resources.append(_Resource())
self.assertTrue(tm._retryable(Exception, object()))
# basic tests with two sub trans jars
# really we only need one, so tests for
# sub1 should identical to tests for sub2
def test_commit_normal(self):
mgr, sub1, sub2, sub3, nosub1 = self._makePopulated()
sub1.modify()
sub2.modify()
mgr.commit()
assert sub1._p_jar.ccommit_sub == 0
assert sub1._p_jar.ctpc_finish == 1
def test_abort_normal(self):
mgr, sub1, sub2, sub3, nosub1 = self._makePopulated()
sub1.modify()
sub2.modify()
mgr.abort()
assert sub2._p_jar.cabort == 1
# repeat adding in a nonsub trans jars
def test_commit_w_nonsub_jar(self):
mgr, sub1, sub2, sub3, nosub1 = self._makePopulated()
nosub1.modify()
mgr.commit()
assert nosub1._p_jar.ctpc_finish == 1
def test_abort_w_nonsub_jar(self):
mgr, sub1, sub2, sub3, nosub1 = self._makePopulated()
nosub1.modify()
mgr.abort()
assert nosub1._p_jar.ctpc_finish == 0
assert nosub1._p_jar.cabort == 1
### Failure Mode Tests
#
# ok now we do some more interesting
# tests that check the implementations
# error handling by throwing errors from
# various jar methods
###
# first the recoverable errors
def test_abort_w_broken_jar(self):
from transaction import _transaction
from transaction.tests.common import DummyLogger
from transaction.tests.common import Monkey
logger = DummyLogger()
with Monkey(_transaction, _LOGGER=logger):
mgr, sub1, sub2, sub3, nosub1 = self._makePopulated()
sub1._p_jar = BasicJar(errors='abort')
nosub1.modify()
sub1.modify(nojar=1)
sub2.modify()
try:
mgr.abort()
except TestTxnException:
pass
assert nosub1._p_jar.cabort == 1
assert sub2._p_jar.cabort == 1
def test_commit_w_broken_jar_commit(self):
from transaction import _transaction
from transaction.tests.common import DummyLogger
from transaction.tests.common import Monkey
logger = DummyLogger()
with Monkey(_transaction, _LOGGER=logger):
mgr, sub1, sub2, sub3, nosub1 = self._makePopulated()
sub1._p_jar = BasicJar(errors='commit')
nosub1.modify()
sub1.modify(nojar=1)
try:
mgr.commit()
except TestTxnException:
pass
assert nosub1._p_jar.ctpc_finish == 0
assert nosub1._p_jar.ccommit == 1
assert nosub1._p_jar.ctpc_abort == 1
def test_commit_w_broken_jar_tpc_vote(self):
from transaction import _transaction
from transaction.tests.common import DummyLogger
from transaction.tests.common import Monkey
logger = DummyLogger()
with Monkey(_transaction, _LOGGER=logger):
mgr, sub1, sub2, sub3, nosub1 = self._makePopulated()
sub1._p_jar = BasicJar(errors='tpc_vote')
nosub1.modify()
sub1.modify(nojar=1)
try:
mgr.commit()
except TestTxnException:
pass
assert nosub1._p_jar.ctpc_finish == 0
assert nosub1._p_jar.ccommit == 1
assert nosub1._p_jar.ctpc_abort == 1
assert sub1._p_jar.ctpc_abort == 1
def test_commit_w_broken_jar_tpc_begin(self):
# ok this test reveals a bug in the TM.py
# as the nosub tpc_abort there is ignored.
# nosub calling method tpc_begin
# nosub calling method commit
# sub calling method tpc_begin
# sub calling method abort
# sub calling method tpc_abort
# nosub calling method tpc_abort
from transaction import _transaction
from transaction.tests.common import DummyLogger
from transaction.tests.common import Monkey
logger = DummyLogger()
with Monkey(_transaction, _LOGGER=logger):
mgr, sub1, sub2, sub3, nosub1 = self._makePopulated()
sub1._p_jar = BasicJar(errors='tpc_begin')
nosub1.modify()
sub1.modify(nojar=1)
try:
mgr.commit()
except TestTxnException:
pass
assert nosub1._p_jar.ctpc_abort == 1
assert sub1._p_jar.ctpc_abort == 1
def test_commit_w_broken_jar_tpc_abort_tpc_vote(self):
from transaction import _transaction
from transaction.tests.common import DummyLogger
from transaction.tests.common import Monkey
logger = DummyLogger()
with Monkey(_transaction, _LOGGER=logger):
mgr, sub1, sub2, sub3, nosub1 = self._makePopulated()
sub1._p_jar = BasicJar(errors=('tpc_abort', 'tpc_vote'))
nosub1.modify()
sub1.modify(nojar=1)
try:
mgr.commit()
except TestTxnException:
pass
assert nosub1._p_jar.ctpc_abort == 1
class AttemptTests(unittest.TestCase):
def _makeOne(self, manager):
from transaction._manager import Attempt
return Attempt(manager)
def test___enter__(self):
manager = DummyManager()
inst = self._makeOne(manager)
inst.__enter__()
self.assertTrue(manager.entered)
def test___exit__no_exc_no_commit_exception(self):
manager = DummyManager()
inst = self._makeOne(manager)
result = inst.__exit__(None, None, None)
self.assertFalse(result)
self.assertTrue(manager.committed)
def test___exit__no_exc_nonretryable_commit_exception(self):
manager = DummyManager(raise_on_commit=ValueError)
inst = self._makeOne(manager)
self.assertRaises(ValueError, inst.__exit__, None, None, None)
self.assertTrue(manager.committed)
self.assertTrue(manager.aborted)
def test___exit__no_exc_abort_exception_after_nonretryable_commit_exc(self):
manager = DummyManager(raise_on_abort=ValueError,
raise_on_commit=KeyError)
inst = self._makeOne(manager)
self.assertRaises(ValueError, inst.__exit__, None, None, None)
self.assertTrue(manager.committed)
self.assertTrue(manager.aborted)
def test___exit__no_exc_retryable_commit_exception(self):
from transaction.interfaces import TransientError
manager = DummyManager(raise_on_commit=TransientError)
inst = self._makeOne(manager)
result = inst.__exit__(None, None, None)
self.assertTrue(result)
self.assertTrue(manager.committed)
self.assertTrue(manager.aborted)
def test___exit__with_exception_value_retryable(self):
from transaction.interfaces import TransientError
manager = DummyManager()
inst = self._makeOne(manager)
result = inst.__exit__(TransientError, TransientError(), None)
self.assertTrue(result)
self.assertFalse(manager.committed)
self.assertTrue(manager.aborted)
def test___exit__with_exception_value_nonretryable(self):
manager = DummyManager()
inst = self._makeOne(manager)
self.assertRaises(KeyError, inst.__exit__, KeyError, KeyError(), None)
self.assertFalse(manager.committed)
self.assertTrue(manager.aborted)
class DummyManager(object):
entered = False
committed = False
aborted = False
def __init__(self, raise_on_commit=None, raise_on_abort=None):
self.raise_on_commit = raise_on_commit
self.raise_on_abort = raise_on_abort
def _retryable(self, t, v):
from transaction._manager import TransientError
return issubclass(t, TransientError)
def __enter__(self):
self.entered = True
def abort(self):
self.aborted = True
if self.raise_on_abort:
raise self.raise_on_abort
def commit(self):
self.committed = True
if self.raise_on_commit:
raise self.raise_on_commit
class DataObject:
def __init__(self, transaction_manager, nost=0):
self.transaction_manager = transaction_manager
self.nost = nost
self._p_jar = None
def modify(self, nojar=0, tracing=0):
if not nojar:
if self.nost:
self._p_jar = BasicJar(tracing=tracing)
else:
self._p_jar = BasicJar(tracing=tracing)
self.transaction_manager.get().join(self._p_jar)
class TestTxnException(Exception):
pass
class BasicJar:
def __init__(self, errors=(), tracing=0):
if not isinstance(errors, tuple):
errors = errors,
self.errors = errors
self.tracing = tracing
self.cabort = 0
self.ccommit = 0
self.ctpc_begin = 0
self.ctpc_abort = 0
self.ctpc_vote = 0
self.ctpc_finish = 0
self.cabort_sub = 0
self.ccommit_sub = 0
def __repr__(self):
return "<%s %X %s>" % (self.__class__.__name__,
positive_id(self),
self.errors)
def sortKey(self):
# All these jars use the same sort key, and Python's list.sort()
# is stable. These two
return self.__class__.__name__
def check(self, method):
if self.tracing:
print('%s calling method %s'%(str(self.tracing),method))
if method in self.errors:
raise TestTxnException("error %s" % method)
## basic jar txn interface
def abort(self, *args):
self.check('abort')
self.cabort += 1
def commit(self, *args):
self.check('commit')
self.ccommit += 1
def tpc_begin(self, txn, sub=0):
self.check('tpc_begin')
self.ctpc_begin += 1
def tpc_vote(self, *args):
self.check('tpc_vote')
self.ctpc_vote += 1
def tpc_abort(self, *args):
self.check('tpc_abort')
self.ctpc_abort += 1
def tpc_finish(self, *args):
self.check('tpc_finish')
self.ctpc_finish += 1
class DummySynch(object):
def __init__(self):
self._txns = set()
def newTransaction(self, txn):
self._txns.add(txn)
def positive_id(obj):
"""Return id(obj) as a non-negative integer."""
import struct
_ADDRESS_MASK = 256 ** struct.calcsize('P')
result = id(obj)
if result < 0:
result += _ADDRESS_MASK
assert result > 0
return result
def test_suite():
return unittest.TestSuite((
unittest.makeSuite(TransactionManagerTests),
unittest.makeSuite(AttemptTests),
))
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