mirror of
https://github.com/python/cpython
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183 lines
6.8 KiB
Python
183 lines
6.8 KiB
Python
from test import support
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from test.support import import_helper, cpython_only
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gdbm = import_helper.import_module("dbm.gnu") #skip if not supported
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import unittest
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import os
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from test.support.os_helper import TESTFN, TESTFN_NONASCII, unlink, FakePath
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filename = TESTFN
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class TestGdbm(unittest.TestCase):
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@staticmethod
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def setUpClass():
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if support.verbose:
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try:
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from _gdbm import _GDBM_VERSION as version
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except ImportError:
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pass
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else:
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print(f"gdbm version: {version}")
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def setUp(self):
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self.g = None
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def tearDown(self):
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if self.g is not None:
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self.g.close()
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unlink(filename)
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@cpython_only
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def test_disallow_instantiation(self):
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# Ensure that the type disallows instantiation (bpo-43916)
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self.g = gdbm.open(filename, 'c')
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support.check_disallow_instantiation(self, type(self.g))
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def test_key_methods(self):
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self.g = gdbm.open(filename, 'c')
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self.assertEqual(self.g.keys(), [])
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self.g['a'] = 'b'
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self.g['12345678910'] = '019237410982340912840198242'
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self.g[b'bytes'] = b'data'
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key_set = set(self.g.keys())
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self.assertEqual(key_set, set([b'a', b'bytes', b'12345678910']))
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self.assertIn('a', self.g)
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self.assertIn(b'a', self.g)
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self.assertEqual(self.g[b'bytes'], b'data')
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key = self.g.firstkey()
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while key:
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self.assertIn(key, key_set)
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key_set.remove(key)
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key = self.g.nextkey(key)
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# get() and setdefault() work as in the dict interface
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self.assertEqual(self.g.get(b'a'), b'b')
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self.assertIsNone(self.g.get(b'xxx'))
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self.assertEqual(self.g.get(b'xxx', b'foo'), b'foo')
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with self.assertRaises(KeyError):
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self.g['xxx']
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self.assertEqual(self.g.setdefault(b'xxx', b'foo'), b'foo')
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self.assertEqual(self.g[b'xxx'], b'foo')
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def test_error_conditions(self):
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# Try to open a non-existent database.
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unlink(filename)
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self.assertRaises(gdbm.error, gdbm.open, filename, 'r')
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# Try to access a closed database.
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self.g = gdbm.open(filename, 'c')
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self.g.close()
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self.assertRaises(gdbm.error, lambda: self.g['a'])
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# try pass an invalid open flag
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self.assertRaises(gdbm.error, lambda: gdbm.open(filename, 'rx').close())
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def test_flags(self):
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# Test the flag parameter open() by trying all supported flag modes.
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all = set(gdbm.open_flags)
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# Test standard flags (presumably "crwn").
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modes = all - set('fsu')
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for mode in sorted(modes): # put "c" mode first
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self.g = gdbm.open(filename, mode)
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self.g.close()
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# Test additional flags (presumably "fsu").
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flags = all - set('crwn')
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for mode in modes:
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for flag in flags:
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self.g = gdbm.open(filename, mode + flag)
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self.g.close()
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def test_reorganize(self):
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self.g = gdbm.open(filename, 'c')
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size0 = os.path.getsize(filename)
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# bpo-33901: on macOS with gdbm 1.15, an empty database uses 16 MiB
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# and adding an entry of 10,000 B has no effect on the file size.
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# Add size0 bytes to make sure that the file size changes.
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value_size = max(size0, 10000)
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self.g['x'] = 'x' * value_size
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size1 = os.path.getsize(filename)
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self.assertGreater(size1, size0)
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del self.g['x']
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# 'size' is supposed to be the same even after deleting an entry.
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self.assertEqual(os.path.getsize(filename), size1)
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self.g.reorganize()
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size2 = os.path.getsize(filename)
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self.assertLess(size2, size1)
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self.assertGreaterEqual(size2, size0)
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def test_context_manager(self):
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with gdbm.open(filename, 'c') as db:
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db["gdbm context manager"] = "context manager"
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with gdbm.open(filename, 'r') as db:
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self.assertEqual(list(db.keys()), [b"gdbm context manager"])
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with self.assertRaises(gdbm.error) as cm:
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db.keys()
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self.assertEqual(str(cm.exception),
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"GDBM object has already been closed")
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def test_bytes(self):
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with gdbm.open(filename, 'c') as db:
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db[b'bytes key \xbd'] = b'bytes value \xbd'
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with gdbm.open(filename, 'r') as db:
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self.assertEqual(list(db.keys()), [b'bytes key \xbd'])
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self.assertTrue(b'bytes key \xbd' in db)
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self.assertEqual(db[b'bytes key \xbd'], b'bytes value \xbd')
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def test_unicode(self):
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with gdbm.open(filename, 'c') as db:
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db['Unicode key \U0001f40d'] = 'Unicode value \U0001f40d'
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with gdbm.open(filename, 'r') as db:
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self.assertEqual(list(db.keys()), ['Unicode key \U0001f40d'.encode()])
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self.assertTrue('Unicode key \U0001f40d'.encode() in db)
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self.assertTrue('Unicode key \U0001f40d' in db)
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self.assertEqual(db['Unicode key \U0001f40d'.encode()],
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'Unicode value \U0001f40d'.encode())
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self.assertEqual(db['Unicode key \U0001f40d'],
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'Unicode value \U0001f40d'.encode())
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def test_write_readonly_file(self):
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with gdbm.open(filename, 'c') as db:
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db[b'bytes key'] = b'bytes value'
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with gdbm.open(filename, 'r') as db:
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with self.assertRaises(gdbm.error):
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del db[b'not exist key']
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with self.assertRaises(gdbm.error):
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del db[b'bytes key']
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with self.assertRaises(gdbm.error):
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db[b'not exist key'] = b'not exist value'
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@unittest.skipUnless(TESTFN_NONASCII,
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'requires OS support of non-ASCII encodings')
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def test_nonascii_filename(self):
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filename = TESTFN_NONASCII
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self.addCleanup(unlink, filename)
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with gdbm.open(filename, 'c') as db:
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db[b'key'] = b'value'
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self.assertTrue(os.path.exists(filename))
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with gdbm.open(filename, 'r') as db:
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self.assertEqual(list(db.keys()), [b'key'])
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self.assertTrue(b'key' in db)
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self.assertEqual(db[b'key'], b'value')
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def test_nonexisting_file(self):
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nonexisting_file = 'nonexisting-file'
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with self.assertRaises(gdbm.error) as cm:
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gdbm.open(nonexisting_file)
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self.assertIn(nonexisting_file, str(cm.exception))
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self.assertEqual(cm.exception.filename, nonexisting_file)
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def test_open_with_pathlib_path(self):
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gdbm.open(FakePath(filename), "c").close()
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def test_open_with_bytes_path(self):
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gdbm.open(os.fsencode(filename), "c").close()
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def test_open_with_pathlib_bytes_path(self):
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gdbm.open(FakePath(os.fsencode(filename)), "c").close()
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if __name__ == '__main__':
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unittest.main()
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