cpython/Lib/bsddb/test/test_misc.py

"""Miscellaneous bsddb module test cases
"""

import os
import sys
import unittest
import tempfile

try:
    # For Pythons w/distutils pybsddb
    from bsddb3 import db, dbshelve, hashopen
except ImportError:
    # For Python 2.3
    from bsddb import db, dbshelve, hashopen

#----------------------------------------------------------------------

class MiscTestCase(unittest.TestCase):
    def setUp(self):
        self.filename = self.__class__.__name__ + '.db'
        homeDir = os.path.join(tempfile.gettempdir(), 'db_home')
        self.homeDir = homeDir
        try:
            os.mkdir(homeDir)
        except OSError:
            pass

    def tearDown(self):
        try:
            os.remove(self.filename)
        except OSError:
            pass
        import glob
        files = glob.glob(os.path.join(self.homeDir, '*'))
        for file in files:
            os.remove(file)

    def test01_badpointer(self):
        dbs = dbshelve.open(self.filename)
        dbs.close()
        self.assertRaises(db.DBError, dbs.get, "foo")

    def test02_db_home(self):
        env = db.DBEnv()
        # check for crash fixed when db_home is used before open()
        assert env.db_home is None
        env.open(self.homeDir, db.DB_CREATE)
        assert self.homeDir == env.db_home

    def test03_repr_closed_db(self):
        db = hashopen(self.filename)
        db.close()
        rp = repr(db)
        self.assertEquals(rp, "{}")

    # http://sourceforge.net/tracker/index.php?func=detail&aid=1708868&group_id=13900&atid=313900
    #
    # See the bug report for details.
    #
    # The problem was that make_key_dbt() was not allocating a copy of
    # string keys but FREE_DBT() was always being told to free it when the
    # database was opened with DB_THREAD.
    def test04_double_free_make_key_dbt(self):
        try:
            db1 = db.DB()
            db1.open(self.filename, None, db.DB_BTREE,
                     db.DB_CREATE | db.DB_THREAD)

            curs = db1.cursor()
            t = curs.get("/foo", db.DB_SET)
            # double free happened during exit from DBC_get
        finally:
            db1.close()
            os.unlink(self.filename)


#----------------------------------------------------------------------


def test_suite():
    return unittest.makeSuite(MiscTestCase)


if __name__ == '__main__':
    unittest.main(defaultTest='test_suite')