import os

import pickle

try:

    import cPickle

except ImportError:

    cPickle = None

import unittest

from test_all import db, test_support, get_new_environment_path, get_new_database_path

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

class pickleTestCase(unittest.TestCase):

    """Verify that DBError can be pickled and unpickled"""

    db_name = 'test-dbobj.db'

    def setUp(self):

        self.homeDir = get_new_environment_path()

    def tearDown(self):

        if hasattr(self, 'db'):

            del self.db

        if hasattr(self, 'env'):

            del self.env

        test_support.rmtree(self.homeDir)

    def _base_test_pickle_DBError(self, pickle):

        self.env = db.DBEnv()

        self.env.open(self.homeDir, db.DB_CREATE | db.DB_INIT_MPOOL)

        self.db = db.DB(self.env)

        self.db.open(self.db_name, db.DB_HASH, db.DB_CREATE)

        self.db.put('spam', 'eggs')

        self.assertEqual(self.db['spam'], 'eggs')

        try:

            self.db.put('spam', 'ham', flags=db.DB_NOOVERWRITE)

        except db.DBError, egg:

            pickledEgg = pickle.dumps(egg)

            #print repr(pickledEgg)

            rottenEgg = pickle.loads(pickledEgg)

            if rottenEgg.args != egg.args or type(rottenEgg) != type(egg):

                raise Exception, (rottenEgg, '!=', egg)

        else:

            raise Exception, "where's my DBError exception?!?"

        self.db.close()

        self.env.close()

    def test01_pickle_DBError(self):

        self._base_test_pickle_DBError(pickle=pickle)

    if cPickle:

        def test02_cPickle_DBError(self):

            self._base_test_pickle_DBError(pickle=cPickle)

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

def test_suite():

    return unittest.makeSuite(pickleTestCase)

if __name__ == '__main__':

    unittest.main(defaultTest='test_suite')