Mercurial > p > roundup > code
comparison test/db_test_base.py @ 4448:2784c239e6c8
clear the cache on commit for rdbms backends:
Don't carry over cached values from one transaction to the next (there
may be other changes from other transactions) see new ConcurrentDBTest
for a read-modify-update cycle that fails with the old caching
behavior.
| author | Ralf Schlatterbeck <schlatterbeck@users.sourceforge.net> |
|---|---|
| date | Fri, 22 Oct 2010 14:14:26 +0000 |
| parents | 67bef70ab9b9 |
| children | 34dce76bb202 |
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| 4447:9d37875416c3 | 4448:2784c239e6c8 |
|---|---|
| 2170 try: | 2170 try: |
| 2171 shutil.rmtree(self.dirname) | 2171 shutil.rmtree(self.dirname) |
| 2172 except OSError, error: | 2172 except OSError, error: |
| 2173 if error.errno not in (errno.ENOENT, errno.ESRCH): raise | 2173 if error.errno not in (errno.ENOENT, errno.ESRCH): raise |
| 2174 | 2174 |
| 2175 class ConcurrentDBTest(ClassicInitTest): | |
| 2176 def testConcurrency(self): | |
| 2177 # The idea here is a read-modify-update cycle in the presence of | |
| 2178 # a cache that has to be properly handled. The same applies if | |
| 2179 # we extend a String or otherwise modify something that depends | |
| 2180 # on the previous value. | |
| 2181 | |
| 2182 # set up and open a tracker | |
| 2183 tracker = setupTracker(self.dirname, self.backend) | |
| 2184 # open the database | |
| 2185 self.db = tracker.open('admin') | |
| 2186 | |
| 2187 prio = '1' | |
| 2188 self.assertEqual(self.db.priority.get(prio, 'order'), 1.0) | |
| 2189 def inc(db): | |
| 2190 db.priority.set(prio, order=db.priority.get(prio, 'order') + 1) | |
| 2191 | |
| 2192 inc(self.db) | |
| 2193 | |
| 2194 db2 = tracker.open("admin") | |
| 2195 self.assertEqual(db2.priority.get(prio, 'order'), 1.0) | |
| 2196 db2.commit() | |
| 2197 self.db.commit() | |
| 2198 self.assertEqual(self.db.priority.get(prio, 'order'), 2.0) | |
| 2199 | |
| 2200 inc(db2) | |
| 2201 db2.commit() | |
| 2202 db2.clearCache() | |
| 2203 self.assertEqual(db2.priority.get(prio, 'order'), 3.0) | |
| 2204 db2.close() | |
| 2205 | |
| 2206 | |
| 2175 # vim: set et sts=4 sw=4 : | 2207 # vim: set et sts=4 sw=4 : |