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""" Test cases for dirdbm module. """ import shutil from base64 import b64decode from twisted.trial import unittest from twisted.persisted import dirdbm from twisted.python import rebuild from twisted.python.filepath import FilePath class DirDbmTests(unittest.TestCase): def setUp(self): self.path = FilePath(self.mktemp()) self.dbm = dirdbm.open(self.path.path) self.items = ((b'abc', b'foo'), (b'/lalal', b'\000\001'), (b'\000\012', b'baz')) def test_all(self): k = b64decode("//==") self.dbm[k] = b"a" self.dbm[k] = b"a" self.assertEqual(self.dbm[k], b"a") def test_rebuildInteraction(self): s = dirdbm.Shelf('dirdbm.rebuild.test') s[b'key'] = b'value' rebuild.rebuild(dirdbm) def test_dbm(self): d = self.dbm # Insert keys keys = [] values = set() for k, v in self.items: d[k] = v keys.append(k) values.add(v) keys.sort() # Check they exist for k, v in self.items: self.assertIn(k, d) self.assertEqual(d[k], v) # Check non existent key try: d[b"XXX"] except KeyError: pass else: assert 0, "didn't raise KeyError on non-existent key" # Check keys(), values() and items() dbkeys = d.keys() dbvalues = set(d.values()) dbitems = set(d.items()) dbkeys.sort() items = set(self.items) self.assertEqual(keys, dbkeys, ".keys() output didn't match: %s != %s" % (repr(keys), repr(dbkeys))) self.assertEqual(values, dbvalues, ".values() output didn't match: %s != %s" % (repr(values), repr(dbvalues))) self.assertEqual(items, dbitems, "items() didn't match: %s != %s" % (repr(items), repr(dbitems))) copyPath = self.mktemp() d2 = d.copyTo(copyPath) copykeys = d.keys() copyvalues = set(d.values()) copyitems = set(d.items()) copykeys.sort() self.assertEqual(dbkeys, copykeys, ".copyTo().keys() didn't match: %s != %s" % (repr(dbkeys), repr(copykeys))) self.assertEqual(dbvalues, copyvalues, ".copyTo().values() didn't match: %s != %s" % (repr(dbvalues), repr(copyvalues))) self.assertEqual(dbitems, copyitems, ".copyTo().items() didn't match: %s != %s" % (repr(dbkeys), repr(copyitems))) d2.clear() self.assertTrue(len(d2.keys()) == len(d2.values()) == len(d2.items()) == len(d2) == 0, ".clear() failed") self.assertNotEqual(len(d), len(d2)) shutil.rmtree(copyPath) # Delete items for k, v in self.items: del d[k] self.assertNotIn(k, d, "key is still in database, even though we deleted it") self.assertEqual(len(d.keys()), 0, "database has keys") self.assertEqual(len(d.values()), 0, "database has values") self.assertEqual(len(d.items()), 0, "database has items") self.assertEqual(len(d), 0, "database has items") def test_modificationTime(self): import time # The mtime value for files comes from a different place than the # gettimeofday() system call. On linux, gettimeofday() can be # slightly ahead (due to clock drift which gettimeofday() takes into # account but which open()/write()/close() do not), and if we are # close to the edge of the next second, time.time() can give a value # which is larger than the mtime which results from a subsequent # write(). I consider this a kernel bug, but it is beyond the scope # of this test. Thus we keep the range of acceptability to 3 seconds time. # -warner self.dbm[b"k"] = b"v" self.assertTrue(abs(time.time() - self.dbm.getModificationTime(b"k")) <= 3) self.assertRaises(KeyError, self.dbm.getModificationTime, b"nokey") def test_recovery(self): """ DirDBM: test recovery from directory after a faked crash """ k = self.dbm._encode(b"key1") with self.path.child(k + b".rpl").open(mode="wb") as f: f.write(b"value") k2 = self.dbm._encode(b"key2") with self.path.child(k2).open(mode="wb") as f: f.write(b"correct") with self.path.child(k2 + b".rpl").open(mode="wb") as f: f.write(b"wrong") with self.path.child("aa.new").open(mode="wb") as f: f.write(b"deleted") dbm = dirdbm.DirDBM(self.path.path) self.assertEqual(dbm[b"key1"], b"value") self.assertEqual(dbm[b"key2"], b"correct") self.assertFalse(self.path.globChildren("*.new")) self.assertFalse(self.path.globChildren("*.rpl")) def test_nonStringKeys(self): """ L{dirdbm.DirDBM} operations only support string keys: other types should raise a L{TypeError}. """ self.assertRaises(TypeError, self.dbm.__setitem__, 2, "3") try: self.assertRaises(TypeError, self.dbm.__setitem__, "2", 3) except unittest.FailTest: # dirdbm.Shelf.__setitem__ supports non-string values self.assertIsInstance(self.dbm, dirdbm.Shelf) self.assertRaises(TypeError, self.dbm.__getitem__, 2) self.assertRaises(TypeError, self.dbm.__delitem__, 2) self.assertRaises(TypeError, self.dbm.has_key, 2) self.assertRaises(TypeError, self.dbm.__contains__, 2) self.assertRaises(TypeError, self.dbm.getModificationTime, 2) def test_failSet(self): """ Failure path when setting an item. """ def _writeFail(path, data): path.setContent(data) raise IOError("fail to write") self.dbm[b"failkey"] = b"test" self.patch(self.dbm, "_writeFile", _writeFail) self.assertRaises(IOError, self.dbm.__setitem__, b"failkey", b"test2") class ShelfTests(DirDbmTests): def setUp(self): self.path = FilePath(self.mktemp()) self.dbm = dirdbm.Shelf(self.path.path) self.items = ((b'abc', b'foo'), (b'/lalal', b'\000\001'), (b'\000\012', b'baz'), (b'int', 12), (b'float', 12.0), (b'tuple', (None, 12))) testCases = [DirDbmTests, ShelfTests]