Commit ddfa17a2 authored by Tim Peters's avatar Tim Peters

Merge rev 27557 from 3.3 branch.

New test checkReadConflictErrorClearedDuringAbort().

This confirms that 3.3 didn't have the 3.2.4c1 bug wherein
an explict transaction abort() failed to clear Connections'
memory of ReadConflictErrors.
parent cd339ce8
What's new in ZODB3 3.3?
========================
Release date: DD-Sep-2004
What's new in ZODB3 3.3 release candidate 1?
============================================
Release date: 14-Sep-2004
......
......@@ -359,6 +359,49 @@ class ZODBTests(unittest.TestCase):
self.obj = DecoyIndependent()
self.readConflict()
def checkReadConflictErrorClearedDuringAbort(self):
# When a transaction is aborted, the "memory" of which
# objects were the cause of a ReadConflictError during
# that transaction should be cleared.
root = self._db.open(mvcc=False).root()
data = PersistentMapping({'d': 1})
root["data"] = data
transaction.commit()
# Provoke a ReadConflictError.
tm2 = transaction.TransactionManager()
cn2 = self._db.open(mvcc=False, txn_mgr=tm2)
r2 = cn2.root()
data2 = r2["data"]
data['d'] = 2
transaction.commit()
try:
data2['d'] = 3
except ReadConflictError:
pass
else:
self.fail("No conflict occurred")
# Explicitly abort cn2's transaction.
tm2.get().abort()
# cn2 should retain no memory of the read conflict after an abort(),
# but 3.2.3 had a bug wherein it did.
data_conflicts = data._p_jar._conflicts
data2_conflicts = data2._p_jar._conflicts
self.failIf(data_conflicts)
self.failIf(data2_conflicts) # this used to fail
# And because of that, we still couldn't commit a change to data2['d']
# in the new transaction.
cn2.sync() # process the invalidation for data2['d']
data2['d'] = 3
tm2.get().commit() # 3.2.3 used to raise ReadConflictError
cn2.close()
def checkTxnBeginImpliesAbort(self):
# begin() should do an abort() first, if needed.
cn = self._db.open()
......
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