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#!/usr/bin/env python
# -*- coding: utf-8 -*-
"""Tests for the resolver context object."""
from __future__ import unicode_literals
import unittest
from dfvfs.file_io import fake_file_io
from dfvfs.path import fake_path_spec
from dfvfs.resolver import context
from dfvfs.vfs import fake_file_system
class ContextTest(unittest.TestCase):
"""Tests for the resolver context object."""
def testCacheFileObject(self):
"""Tests the cache file-like object functionality."""
resolver_context = context.Context()
# pylint: disable=protected-access
self.assertEqual(len(resolver_context._file_object_cache._values), 0)
path_spec = fake_path_spec.FakePathSpec(location='/empty.txt')
file_object = fake_file_io.FakeFile(resolver_context, b'')
resolver_context.CacheFileObject(path_spec, file_object)
self.assertEqual(len(resolver_context._file_object_cache._values), 1)
cached_object = resolver_context.GetFileObject(path_spec)
self.assertEqual(cached_object, file_object)
resolver_context.GrabFileObject(path_spec)
self.assertEqual(len(resolver_context._file_object_cache._values), 1)
resolver_context.GrabFileObject(path_spec)
self.assertEqual(len(resolver_context._file_object_cache._values), 1)
resolver_context.ReleaseFileObject(file_object)
self.assertEqual(len(resolver_context._file_object_cache._values), 1)
resolver_context.ReleaseFileObject(file_object)
self.assertEqual(len(resolver_context._file_object_cache._values), 0)
def testCacheFileSystem(self):
"""Tests the cache file system object functionality."""
resolver_context = context.Context()
# pylint: disable=protected-access
self.assertEqual(len(resolver_context._file_system_cache._values), 0)
path_spec = fake_path_spec.FakePathSpec(location='/')
file_system = fake_file_system.FakeFileSystem(resolver_context)
resolver_context.CacheFileSystem(path_spec, file_system)
self.assertEqual(len(resolver_context._file_system_cache._values), 1)
cached_object = resolver_context.GetFileSystem(path_spec)
self.assertEqual(cached_object, file_system)
resolver_context.GrabFileSystem(path_spec)
self.assertEqual(len(resolver_context._file_system_cache._values), 1)
resolver_context.GrabFileSystem(path_spec)
self.assertEqual(len(resolver_context._file_system_cache._values), 1)
resolver_context.ReleaseFileSystem(file_system)
self.assertEqual(len(resolver_context._file_system_cache._values), 1)
resolver_context.ReleaseFileSystem(file_system)
self.assertEqual(len(resolver_context._file_system_cache._values), 0)
if __name__ == '__main__':
unittest.main()
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