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# -*- coding: utf-8 -*-
#
# Author: Facundo Batista <facundo@canonical.com>
#
# Copyright (C) 2011-2012 Canonical Ltd.
#
# This program is free software: you can redistribute it and/or modify it
# under the terms of the GNU Affero General Public License version 3,
# as published by the Free Software Foundation.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranties of
# MERCHANTABILITY, SATISFACTORY QUALITY, or FITNESS FOR A PARTICULAR
# PURPOSE. See the GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# In addition, as a special exception, the copyright holders give
# permission to link the code of portions of this program with the
# OpenSSL library under certain conditions as described in each
# individual source file, and distribute linked combinations
# including the two.
# You must obey the GNU General Public License in all respects
# for all of the code used other than OpenSSL. If you modify
# file(s) with this exception, you may extend this exception to your
# version of the file(s), but you are not obligated to do so. If you
# do not wish to do so, delete this exception statement from your
# version. If you delete this exception statement from all source
# files in the program, then also delete it here.
"""Tests for the protocol hashing methods."""
import hashlib
import os
import pickle
import unittest
from ubuntuone.storageprotocol.content_hash import (
MagicContentHash,
SHA1ContentHash,
content_hash_factory,
magic_hash_factory,
)
# let's not get picky about aatributes outside __init__ in tests
# pylint: disable=W0201
# it's ok to access internals in the test suite
# pylint: disable=W0212
class FactoriesTest(unittest.TestCase):
"""Test the hasher factories."""
def test_content_hash_factory(self):
"""Check the factory for the normal content hash."""
o = content_hash_factory()
self.assertTrue(isinstance(o, SHA1ContentHash))
def test_content_hash_method(self):
"""Test the method that the normal content hash uses."""
self.assertEqual(SHA1ContentHash.method, hashlib.sha1)
def test_content_hash_method_name(self):
"""Test the method name for the normal content hash."""
self.assertEqual(SHA1ContentHash.method_name, 'sha1')
def test_magic_hash_factory(self):
"""Check the factory for the magic content hash."""
o = magic_hash_factory()
self.assertTrue(isinstance(o, MagicContentHash))
def test_magic_hash_method(self):
"""Test the method that the magic content hash uses."""
self.assertEqual(MagicContentHash.method, hashlib.sha1)
def test_magic_hash_method_name(self):
"""Test the method name for the magic content hash."""
self.assertEqual(MagicContentHash.method_name, 'magic_hash')
class ContentHashingTests(unittest.TestCase):
"""Test normal content hashing."""
def setUp(self):
"""Set up."""
self.hasher = SHA1ContentHash()
def test_hashing_empty(self):
"""Test the hashing for no data."""
r = self.hasher.hexdigest()
s = hashlib.sha1().hexdigest()
self.assertEqual(r, s)
def test_hashing_content_once(self):
"""Test the hashing for some content sent once."""
self.hasher.update("foobar")
r = self.hasher.hexdigest()
s = hashlib.sha1("foobar").hexdigest()
self.assertEqual(r, s)
def test_hashing_content_upadting(self):
"""Test the hashing for some content sent more than once."""
c1 = os.urandom(1000)
c2 = os.urandom(1000)
self.hasher.update(c1)
self.hasher.update(c2)
r = self.hasher.hexdigest()
s = hashlib.sha1(c1 + c2).hexdigest()
self.assertEqual(r, s)
def test_content_hash(self):
"""The hexdigest with the prefix."""
self.hasher.update("foobar")
hexdigest = self.hasher.hexdigest()
ch = self.hasher.content_hash()
self.assertEqual("sha1:" + hexdigest, ch)
class MagicHashingTests(unittest.TestCase):
"""Test magic content hashing."""
def setUp(self):
"""Set up."""
self.hasher = MagicContentHash()
def test_hashing_empty(self):
"""Test the hashing for no data."""
r = self.hasher.hash_object.hexdigest()
s = hashlib.sha1("Ubuntu One").hexdigest()
self.assertEqual(r, s)
def test_hashing_content_once(self):
"""Test the hashing for some content sent once."""
self.hasher.update("foobar")
r = self.hasher.hash_object.hexdigest()
s = hashlib.sha1("Ubuntu Onefoobar").hexdigest()
self.assertEqual(r, s)
def test_hashing_content_upadting(self):
"""Test the hashing for some content sent more than once."""
c1 = os.urandom(1000)
c2 = os.urandom(1000)
self.hasher.update(c1)
self.hasher.update(c2)
r = self.hasher.hash_object.hexdigest()
s = hashlib.sha1("Ubuntu One" + c1 + c2).hexdigest()
self.assertEqual(r, s)
def test_hexdigest_hiding(self):
"""Can not access the hex digest."""
self.assertRaises(NotImplementedError, self.hasher.hexdigest)
def test_digest_hiding(self):
"""Can not access the digest."""
self.assertRaises(NotImplementedError, self.hasher.digest)
def test_content_hash_hiding(self):
"""The content hash is not the content hash!"""
self.hasher.update("foobar")
hexdigest = self.hasher.hash_object.hexdigest()
ch = self.hasher.content_hash()
# not a string, and never show the content
self.assertFalse(isinstance(ch, basestring))
self.assertFalse(hexdigest in str(ch))
self.assertFalse(hexdigest in repr(ch))
# we have the real value hidden in the object
self.assertEqual('magic_hash:' + hexdigest, ch._magic_hash)
def test_not_pickable(self):
"""The magic hasher and value can not be pickled"""
# the hasher
self.assertRaises(NotImplementedError, pickle.dumps, self.hasher)
# the value
ch = self.hasher.content_hash()
self.assertRaises(NotImplementedError, pickle.dumps, ch)
if __name__ == '__main__':
unittest.main()
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