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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 sorted(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)
# bpo-33901: on macOS with gdbm 1.15, an empty database uses 16 MiB
# and adding an entry of 10,000 B has no effect on the file size.
# Add size0 bytes to make sure that the file size changes.
value_size = max(size0, 10000)
self.g['x'] = 'x' * value_size
size1 = os.path.getsize(filename)
self.assertGreater(size1, size0)
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.assertLess(size2, size1)
self.assertGreaterEqual(size2, size0)
def test_sync(self):
# check if sync works at all, not sure how to check it
self.g = gdbm.open(filename, 'cf')
self.g['x'] = 'x' * 10000
self.g.sync()
def test_get_key(self):
self.g = gdbm.open(filename, 'cf')
self.g['x'] = 'x' * 10000
self.g.close()
self.g = gdbm.open(filename, 'r')
self.assertEquals(self.g['x'], 'x' * 10000)
def test_key_with_null_bytes(self):
key = 'a\x00b'
value = 'c\x00d'
self.g = gdbm.open(filename, 'cf')
self.g[key] = value
self.g.close()
self.g = gdbm.open(filename, 'r')
self.assertEquals(self.g[key], value)
self.assertTrue(key in self.g)
self.assertTrue(self.g.has_key(key))
def test_unicode_key(self):
key = u'ab'
value = u'cd'
self.g = gdbm.open(filename, 'cf')
self.g[key] = value
self.g.close()
self.g = gdbm.open(filename, 'r')
self.assertEquals(self.g[key], value)
self.assertTrue(key in self.g)
self.assertTrue(self.g.has_key(key))
def test_main():
run_unittest(TestGdbm)
if __name__ == '__main__':
test_main()
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