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"""
TestCases for checking set_get_returns_none.
"""
import sys, os, string
import tempfile
from pprint import pprint
import unittest
from bsddb import db
from bsddb.test.test_all import verbose
letters = 'abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ'
#----------------------------------------------------------------------
class GetReturnsNoneTestCase(unittest.TestCase):
def setUp(self):
self.filename = tempfile.mktemp()
def tearDown(self):
try:
os.remove(self.filename)
except os.error:
pass
def test01_get_returns_none(self):
d = db.DB()
d.open(self.filename, db.DB_BTREE, db.DB_CREATE)
d.set_get_returns_none(1)
for x in letters:
x = x.encode("ascii")
d.put(x, x * 40)
data = d.get(b'bad key')
assert data == None
data = d.get(b'a')
assert data == b'a'*40
count = 0
c = d.cursor()
rec = c.first()
while rec:
count = count + 1
rec = c.next()
assert rec == None
assert count == 52
c.close()
d.close()
def test02_get_raises_exception(self):
d = db.DB()
d.open(self.filename, db.DB_BTREE, db.DB_CREATE)
d.set_get_returns_none(0)
for x in letters:
x = x.encode("ascii")
d.put(x, x * 40)
self.assertRaises(db.DBNotFoundError, d.get, b'bad key')
self.assertRaises(KeyError, d.get, b'bad key')
data = d.get(b'a')
assert data == b'a'*40
count = 0
exceptionHappened = 0
c = d.cursor()
rec = c.first()
while rec:
count = count + 1
try:
rec = c.next()
except db.DBNotFoundError: # end of the records
exceptionHappened = 1
break
assert rec != None
assert exceptionHappened
assert count == 52
c.close()
d.close()
#----------------------------------------------------------------------
def test_suite():
return unittest.makeSuite(GetReturnsNoneTestCase)
if __name__ == '__main__':
unittest.main(defaultTest='test_suite')
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