python类ndbm()的实例源码

def test_whichdb_ndbm(self):
        # Issue 17198: check that ndbm which is referenced in whichdb is defined
        db_file = '{}_ndbm.db'.format(_fname)
        with open(db_file, 'w'):
            self.addCleanup(test.support.unlink, db_file)
        self.assertIsNone(self.dbm.whichdb(db_file[:-3]))

def test_whichdb_ndbm(self):
        # Issue 17198: check that ndbm which is referenced in whichdb is defined
        db_file = '{}_ndbm.db'.format(_fname)
        with open(db_file, 'w'):
            self.addCleanup(test.support.unlink, db_file)
        self.assertIsNone(self.dbm.whichdb(db_file[:-3]))

def setUp(self):
        self.filename = support.TESTFN
        self.d = dbm.ndbm.open(self.filename, 'c')
        self.d.close()

def test_keys(self):
        self.d = dbm.ndbm.open(self.filename, 'c')
        self.assertTrue(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')
        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_whichdb_ndbm(self):
        # Issue 17198: check that ndbm which is referenced in whichdb is defined
        db_file = '{}_ndbm.db'.format(_fname)
        with open(db_file, 'w'):
            self.addCleanup(test.support.unlink, db_file)
        self.assertIsNone(self.dbm.whichdb(db_file[:-3]))

def setUp(self):
        self.filename = support.TESTFN
        self.d = dbm.ndbm.open(self.filename, 'c')
        self.d.close()

def test_keys(self):
        self.d = dbm.ndbm.open(self.filename, 'c')
        self.assertTrue(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')
        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")