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Issue #28847: dbm.dumb now supports reading read-only files and no longer

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writes the index file when it is not changed.
This commit is contained in:
Serhiy Storchaka 2016-12-07 11:00:06 +02:00
commit 520348e5c0
4 changed files with 26 additions and 4 deletions
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16
Lib/test/test_dbm_dumb.py
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@ -5,6 +5,7 @@
import io
import operator
import os
import stat
import unittest
import warnings
import dbm.dumb as dumbdbm
@ -259,6 +260,21 @@ class DumbDBMTestCase(unittest.TestCase):
f = dumbdbm.open(_fname, flag)
f.close()
@unittest.skipUnless(hasattr(os, 'chmod'), 'test needs os.chmod()')
def test_readonly_files(self):
with support.temp_dir() as dir:
fname = os.path.join(dir, 'db')
with dumbdbm.open(fname, 'n') as f:
self.assertEqual(list(f.keys()), [])
for key in self._dict:
f[key] = self._dict[key]
os.chmod(fname + ".dir", stat.S_IRUSR)
os.chmod(fname + ".dat", stat.S_IRUSR)
os.chmod(dir, stat.S_IRUSR|stat.S_IXUSR)
with dumbdbm.open(fname, 'r') as f:
self.assertEqual(sorted(f.keys()), sorted(self._dict))
f.close() # don't write
def tearDown(self):
_delete_files()