cpython/Lib/bsddb/test/test_cursor_pget_bug.py

import unittest
import tempfile
import sys, os, glob
import shutil
import tempfile

from bsddb import db

try:
    from bsddb3 import test_support
except ImportError:
    from test import test_support


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

class pget_bugTestCase(unittest.TestCase):
    """Verify that cursor.pget works properly"""
    db_name = 'test-cursor_pget.db'

    def setUp(self):
        self.homeDir = os.path.join(tempfile.gettempdir(), 'db_home%d'%os.getpid())
        try:
            os.mkdir(self.homeDir)
        except os.error:
            pass
        self.env = db.DBEnv()
        self.env.open(self.homeDir, db.DB_CREATE | db.DB_INIT_MPOOL)
        self.primary_db = db.DB(self.env)
        self.primary_db.open(self.db_name, 'primary', db.DB_BTREE, db.DB_CREATE)
        self.secondary_db = db.DB(self.env)
        self.secondary_db.set_flags(db.DB_DUP)
        self.secondary_db.open(self.db_name, 'secondary', db.DB_BTREE, db.DB_CREATE)
        self.primary_db.associate(self.secondary_db, lambda key, data: data)
        self.primary_db.put(b'salad', b'eggs')
        self.primary_db.put(b'spam', b'ham')
        self.primary_db.put(b'omelet', b'eggs')


    def tearDown(self):
        self.secondary_db.close()
        self.primary_db.close()
        self.env.close()
        del self.secondary_db
        del self.primary_db
        del self.env
        test_support.rmtree(self.homeDir)

    def test_pget(self):
        cursor = self.secondary_db.cursor()

        self.assertEquals((b'eggs', b'salad', b'eggs'), cursor.pget(key=b'eggs', flags=db.DB_SET))
        self.assertEquals((b'eggs', b'omelet', b'eggs'), cursor.pget(db.DB_NEXT_DUP))
        self.assertEquals(None, cursor.pget(db.DB_NEXT_DUP))

        self.assertEquals((b'ham', b'spam', b'ham'), cursor.pget(b'ham', b'spam', flags=db.DB_SET))
        self.assertEquals(None, cursor.pget(db.DB_NEXT_DUP))

        cursor.close()


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

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