import unittest | |
import os | |
from test.test_support import TESTFN, run_unittest, unlink, import_module | |
gdbm = import_module('gdbm') | |
filename = TESTFN | |
class TestGdbm(unittest.TestCase): | |
def setUp(self): | |
self.g = None | |
def tearDown(self): | |
if self.g is not None: | |
self.g.close() | |
unlink(filename) | |
def test_key_methods(self): | |
self.g = gdbm.open(filename, 'c') | |
self.assertEqual(self.g.keys(), []) | |
self.g['a'] = 'b' | |
self.g['12345678910'] = '019237410982340912840198242' | |
key_set = set(self.g.keys()) | |
self.assertEqual(key_set, frozenset(['a', '12345678910'])) | |
self.assertTrue(self.g.has_key('a')) | |
key = self.g.firstkey() | |
while key: | |
self.assertIn(key, key_set) | |
key_set.remove(key) | |
key = self.g.nextkey(key) | |
self.assertRaises(KeyError, lambda: self.g['xxx']) | |
def test_error_conditions(self): | |
# Try to open a non-existent database. | |
unlink(filename) | |
self.assertRaises(gdbm.error, gdbm.open, filename, 'r') | |
# Try to access a closed database. | |
self.g = gdbm.open(filename, 'c') | |
self.g.close() | |
self.assertRaises(gdbm.error, lambda: self.g['a']) | |
# try pass an invalid open flag | |
self.assertRaises(gdbm.error, lambda: gdbm.open(filename, 'rx').close()) | |
def test_flags(self): | |
# Test the flag parameter open() by trying all supported flag modes. | |
all = set(gdbm.open_flags) | |
# Test standard flags (presumably "crwn"). | |
modes = all - set('fsu') | |
for mode in modes: | |
self.g = gdbm.open(filename, mode) | |
self.g.close() | |
# Test additional flags (presumably "fsu"). | |
flags = all - set('crwn') | |
for mode in modes: | |
for flag in flags: | |
self.g = gdbm.open(filename, mode + flag) | |
self.g.close() | |
def test_reorganize(self): | |
self.g = gdbm.open(filename, 'c') | |
size0 = os.path.getsize(filename) | |
self.g['x'] = 'x' * 10000 | |
size1 = os.path.getsize(filename) | |
self.assertTrue(size0 < size1) | |
del self.g['x'] | |
# 'size' is supposed to be the same even after deleting an entry. | |
self.assertEqual(os.path.getsize(filename), size1) | |
self.g.reorganize() | |
size2 = os.path.getsize(filename) | |
self.assertTrue(size1 > size2 >= size0) | |
def test_main(): | |
run_unittest(TestGdbm) | |
if __name__ == '__main__': | |
test_main() |