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