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#!/usr/bin/env python3
'''
t2_inode_cache.py - this file is part of S3QL.
Copyright © 2008 Nikolaus Rath <Nikolaus@rath.org>
This work can be distributed under the terms of the GNU GPLv3.
'''
if __name__ == '__main__':
import sys
import pytest
sys.exit(pytest.main([__file__] + sys.argv[1:]))
import os
import tempfile
import unittest
from s3ql import inode_cache
from s3ql.common import time_ns
from s3ql.database import Connection, create_tables
from s3ql.mkfs import init_tables
class cache_tests(unittest.TestCase):
def setUp(self):
# Destructors are not guaranteed to run, and we can't unlink
# the file immediately because apsw refers to it by name.
# Therefore, we unlink the file manually in tearDown()
self.dbfile = tempfile.NamedTemporaryFile(delete=False)
self.db = Connection(self.dbfile.name)
create_tables(self.db)
init_tables(self.db)
self.cache = inode_cache.InodeCache(self.db, 0)
def tearDown(self):
self.cache.destroy()
os.unlink(self.dbfile.name)
def test_create(self):
attrs = {
'mode': 784,
'refcount': 3,
'uid': 7,
'gid': 2,
'size': 34674,
'rdev': 11,
'atime_ns': time_ns(),
'ctime_ns': time_ns(),
'mtime_ns': time_ns(),
}
inode = self.cache.create_inode(**attrs)
for key in list(attrs.keys()):
self.assertEqual(attrs[key], getattr(inode, key))
self.assertTrue(self.db.has_val('SELECT 1 FROM inodes WHERE id=?', (inode.id,)))
def test_del(self):
attrs = {
'mode': 784,
'refcount': 3,
'uid': 7,
'gid': 2,
'size': 34674,
'rdev': 11,
'atime_ns': time_ns(),
'ctime_ns': time_ns(),
'mtime_ns': time_ns(),
}
inode = self.cache.create_inode(**attrs)
del self.cache[inode.id]
self.assertFalse(self.db.has_val('SELECT 1 FROM inodes WHERE id=?', (inode.id,)))
self.assertRaises(KeyError, self.cache.__delitem__, inode.id)
def test_get(self):
attrs = {
'mode': 784,
'refcount': 3,
'uid': 7,
'gid': 2,
'size': 34674,
'rdev': 11,
'atime_ns': time_ns(),
'ctime_ns': time_ns(),
'mtime_ns': time_ns(),
}
inode = self.cache.create_inode(**attrs)
for key, val in attrs.items():
self.assertEqual(getattr(inode, key), val)
# Create another inode
self.cache.create_inode(**attrs)
self.db.execute('DELETE FROM inodes WHERE id=?', (inode.id,))
# Entry should still be in cache
self.assertEqual(inode, self.cache[inode.id])
# Now it should be out of the cache
for _ in range(inode_cache.CACHE_SIZE + 1):
self.cache.create_inode(**attrs)
self.assertRaises(KeyError, self.cache.__getitem__, inode.id)
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