fixup! *: Use defer for dbclose & friends
In 5c8340d2 we said: dbclose now uses defer almost everywhere - there are still few places in tests, where one test function is opening/closing test database multiple times - those were not (yet ?) converted. Let's convert those remaining places now, because when wendelin.core tests are run wrt plain ZODB4 (contrary to ZODB4-wc2), many tests fail at fileh_open time, e.g. @func def test_bigfile_filezodb_fileh_gc(): root1= dbopen() conn1= root1._p_jar db = conn1.db() defer(db.close) root1['zfile4'] = f1 = ZBigFile(blksize) transaction.commit() > fh1 = f1.fileh_open() bigfile/tests/test_filezodb.py:588: _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ bigfile/file_zodb.py:603: in fileh_open fileh = _ZBigFileH(self, _use_wcfs) bigfile/file_zodb.py:664: in __init__ self.zfileh = zfile._v_file.fileh_open(use_wcfs) bigfile/_file_zodb.pyx:112: in wendelin.bigfile._file_zodb._ZBigFile.fileh_open pywconn = wczsync.pywconnOf(zconn) wcfs/client/_wczsync.pyx:56: in wendelin.wcfs.client._wczsync.pywconnOf wconn = wc.connect(zconn_at(zconn)) lib/zodb.py:163: in zconn_at "ZODB!1") _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ patch = 'conn:MVCC-via-loadBefore-only', details_link = 'ZODB!1' def _zassertHasNXDPatch(patch, details_link): if not _zhasNXDPatch(patch): raise AssertionError( "ZODB%s is not patched with required Nexedi patch %r\n\tSee %s for details" % > (zmajor, patch, details_link)) E AssertionError: ZODB4 is not patched with required Nexedi patch 'conn:MVCC-via-loadBefore-only' E See ZODB!1 for details and DB is left unclosed. This change should reduce, if not completely fix, the number of leaked /tmp/testdb_* directories for Wendelin.core.UnitTest-ZODB4(xfail) testsuite.
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