| from test.support import import_helper |
| from test.support import os_helper |
| import_helper.import_module("dbm.ndbm") #skip if not supported |
| import os |
| import unittest |
| import dbm.ndbm |
| from dbm.ndbm import error |
| |
| class DbmTestCase(unittest.TestCase): |
| |
| def setUp(self): |
| self.filename = os_helper.TESTFN |
| self.d = dbm.ndbm.open(self.filename, 'c') |
| self.d.close() |
| |
| def tearDown(self): |
| for suffix in ['', '.pag', '.dir', '.db']: |
| os_helper.unlink(self.filename + suffix) |
| |
| def test_keys(self): |
| self.d = dbm.ndbm.open(self.filename, 'c') |
| self.assertEqual(self.d.keys(), []) |
| self.d['a'] = 'b' |
| self.d[b'bytes'] = b'data' |
| self.d['12345678910'] = '019237410982340912840198242' |
| self.d.keys() |
| self.assertIn('a', self.d) |
| self.assertIn(b'a', self.d) |
| self.assertEqual(self.d[b'bytes'], b'data') |
| # get() and setdefault() work as in the dict interface |
| self.assertEqual(self.d.get(b'a'), b'b') |
| self.assertIsNone(self.d.get(b'xxx')) |
| self.assertEqual(self.d.get(b'xxx', b'foo'), b'foo') |
| with self.assertRaises(KeyError): |
| self.d['xxx'] |
| self.assertEqual(self.d.setdefault(b'xxx', b'foo'), b'foo') |
| self.assertEqual(self.d[b'xxx'], b'foo') |
| self.d.close() |
| |
| def test_empty_value(self): |
| if dbm.ndbm.library == 'Berkeley DB': |
| self.skipTest("Berkeley DB doesn't distinguish the empty value " |
| "from the absent one") |
| self.d = dbm.ndbm.open(self.filename, 'c') |
| self.assertEqual(self.d.keys(), []) |
| self.d['empty'] = '' |
| self.assertEqual(self.d.keys(), [b'empty']) |
| self.assertIn(b'empty', self.d) |
| self.assertEqual(self.d[b'empty'], b'') |
| self.assertEqual(self.d.get(b'empty'), b'') |
| self.assertEqual(self.d.setdefault(b'empty'), b'') |
| self.d.close() |
| |
| def test_modes(self): |
| for mode in ['r', 'rw', 'w', 'n']: |
| try: |
| self.d = dbm.ndbm.open(self.filename, mode) |
| self.d.close() |
| except error: |
| self.fail() |
| |
| def test_context_manager(self): |
| with dbm.ndbm.open(self.filename, 'c') as db: |
| db["ndbm context manager"] = "context manager" |
| |
| with dbm.ndbm.open(self.filename, 'r') as db: |
| self.assertEqual(list(db.keys()), [b"ndbm context manager"]) |
| |
| with self.assertRaises(dbm.ndbm.error) as cm: |
| db.keys() |
| self.assertEqual(str(cm.exception), |
| "DBM object has already been closed") |
| |
| def test_bytes(self): |
| with dbm.ndbm.open(self.filename, 'c') as db: |
| db[b'bytes key \xbd'] = b'bytes value \xbd' |
| with dbm.ndbm.open(self.filename, 'r') as db: |
| self.assertEqual(list(db.keys()), [b'bytes key \xbd']) |
| self.assertTrue(b'bytes key \xbd' in db) |
| self.assertEqual(db[b'bytes key \xbd'], b'bytes value \xbd') |
| |
| def test_unicode(self): |
| with dbm.ndbm.open(self.filename, 'c') as db: |
| db['Unicode key \U0001f40d'] = 'Unicode value \U0001f40d' |
| with dbm.ndbm.open(self.filename, 'r') as db: |
| self.assertEqual(list(db.keys()), ['Unicode key \U0001f40d'.encode()]) |
| self.assertTrue('Unicode key \U0001f40d'.encode() in db) |
| self.assertTrue('Unicode key \U0001f40d' in db) |
| self.assertEqual(db['Unicode key \U0001f40d'.encode()], |
| 'Unicode value \U0001f40d'.encode()) |
| self.assertEqual(db['Unicode key \U0001f40d'], |
| 'Unicode value \U0001f40d'.encode()) |
| |
| def test_write_readonly_file(self): |
| with dbm.ndbm.open(self.filename, 'c') as db: |
| db[b'bytes key'] = b'bytes value' |
| with dbm.ndbm.open(self.filename, 'r') as db: |
| with self.assertRaises(error): |
| del db[b'not exist key'] |
| with self.assertRaises(error): |
| del db[b'bytes key'] |
| with self.assertRaises(error): |
| db[b'not exist key'] = b'not exist value' |
| |
| @unittest.skipUnless(os_helper.TESTFN_NONASCII, |
| 'requires OS support of non-ASCII encodings') |
| def test_nonascii_filename(self): |
| filename = os_helper.TESTFN_NONASCII |
| for suffix in ['', '.pag', '.dir', '.db']: |
| self.addCleanup(os_helper.unlink, filename + suffix) |
| with dbm.ndbm.open(filename, 'c') as db: |
| db[b'key'] = b'value' |
| self.assertTrue(any(os.path.exists(filename + suffix) |
| for suffix in ['', '.pag', '.dir', '.db'])) |
| with dbm.ndbm.open(filename, 'r') as db: |
| self.assertEqual(list(db.keys()), [b'key']) |
| self.assertTrue(b'key' in db) |
| self.assertEqual(db[b'key'], b'value') |
| |
| def test_nonexisting_file(self): |
| nonexisting_file = 'nonexisting-file' |
| with self.assertRaises(dbm.ndbm.error) as cm: |
| dbm.ndbm.open(nonexisting_file) |
| self.assertIn(nonexisting_file, str(cm.exception)) |
| self.assertEqual(cm.exception.filename, nonexisting_file) |
| |
| |
| if __name__ == '__main__': |
| unittest.main() |