def testGrabAndRelease(self):
"""Tests the GrabObject and ReleaseObject methods."""
cache_object = cache.ObjectsCache(1)
self.assertIsNotNone(cache_object)
cache_object.CacheObject(self._path_spec.comparable, self._vfs_object)
_, cache_value = cache_object.GetCacheValueByObject(self._vfs_object)
# pylint: disable=protected-access
self.assertEqual(cache_value._reference_count, 0)
cache_object.GrabObject(self._path_spec.comparable)
_, cache_value = cache_object.GetCacheValueByObject(self._vfs_object)
self.assertEqual(cache_value._reference_count, 1)
cache_object.GrabObject(self._path_spec.comparable)
_, cache_value = cache_object.GetCacheValueByObject(self._vfs_object)
self.assertEqual(cache_value._reference_count, 2)
cache_object.ReleaseObject(self._path_spec.comparable)
_, cache_value = cache_object.GetCacheValueByObject(self._vfs_object)
self.assertEqual(cache_value._reference_count, 1)
cache_object.ReleaseObject(self._path_spec.comparable)
_, cache_value = cache_object.GetCacheValueByObject(self._vfs_object)
self.assertEqual(cache_value._reference_count, 0)
def __init__(
self, maximum_number_of_file_objects=128,
maximum_number_of_file_systems=16):
"""Initializes the resolver context object.
Args:
maximum_number_of_file_objects (Optional[int]): maximum number
of file-like objects cached in the context.
maximum_number_of_file_systems (Optional[int]): maximum number
of file system objects cached in the context.
"""
super(Context, self).__init__()
self._file_object_cache = cache.ObjectsCache(
maximum_number_of_file_objects)
self._file_system_cache = cache.ObjectsCache(
maximum_number_of_file_systems)
def testGetObject(self):
"""Tests the GetObject method."""
cache_object = cache.ObjectsCache(1)
self.assertIsNotNone(cache_object)
cache_object.CacheObject(self._path_spec.comparable, self._vfs_object)
cached_object = cache_object.GetObject(self._path_spec.comparable)
self.assertEqual(cached_object, self._vfs_object)
def testGetCacheValueByObjectGetCacheValueByObject(self):
"""Tests the GetCacheValueByObject method."""
cache_object = cache.ObjectsCache(1)
self.assertIsNotNone(cache_object)
cache_object.CacheObject(self._path_spec.comparable, self._vfs_object)
identifier, cache_value = cache_object.GetCacheValueByObject(
self._vfs_object)
self.assertEqual(identifier, self._path_spec.comparable)
self.assertEqual(cache_value.vfs_object, self._vfs_object)
def testCacheFull(self):
"""Tests if the CacheFullError is raised."""
cache_object = cache.ObjectsCache(1)
self.assertIsNotNone(cache_object)
cache_object.CacheObject(self._path_spec.comparable, self._vfs_object)
path_spec = fake_path_spec.FakePathSpec(location='2')
vfs_object = TestVFSObject()
with self.assertRaises(errors.CacheFullError):
cache_object.CacheObject(path_spec.comparable, vfs_object)
def testCache(self):
"""Tests the cache functionality."""
cache_object = cache.ObjectsCache(1)
self.assertIsNotNone(cache_object)
# pylint: disable=protected-access
self.assertEqual(len(cache_object._values), 0)
cache_object.CacheObject(self._path_spec.comparable, self._vfs_object)
self.assertEqual(len(cache_object._values), 1)
with self.assertRaises(KeyError):
cache_object.CacheObject(self._path_spec.comparable, self._vfs_object)
self.assertEqual(len(cache_object._values), 1)
cache_object.RemoveObject(self._path_spec.comparable)
self.assertEqual(len(cache_object._values), 0)
def testEmpty(self):
"""Tests the Empty method."""
cache_object = cache.ObjectsCache(5)
self.assertIsNotNone(cache_object)
cache_object.CacheObject(self._path_spec.comparable, self._vfs_object)
path_spec = fake_path_spec.FakePathSpec(location='2')
vfs_object = TestVFSObject()
cache_object.CacheObject(path_spec.comparable, vfs_object)
path_spec = fake_path_spec.FakePathSpec(location='3')
vfs_object = TestVFSObject()
cache_object.CacheObject(path_spec.comparable, vfs_object)
# pylint: disable=protected-access
self.assertEqual(len(cache_object._values), 3)
cache_object.Empty()
self.assertEqual(len(cache_object._values), 0)
