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# Copyright 2016 Lars Wirzenius
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
#
# =*= License: GPL-3+ =*=
import hashlib
import unittest
import obnamlib
class WholeFileCheckSummerTests(unittest.TestCase):
def test_computes_nothing_if_repo_wants_no_checksum(self):
repo = FakeRepository(None)
summer = obnamlib.WholeFileCheckSummer(None)
chunk = 'hello'
token = repo.prepare_chunk_for_indexes(chunk)
summer.append_chunk(chunk, token)
self.assertEqual(summer.get_checksum(), None)
def test_computes_checksum_for_md5(self):
repo = FakeRepository(obnamlib.REPO_FILE_MD5)
summer = obnamlib.WholeFileCheckSummer(obnamlib.REPO_FILE_MD5)
chunk = 'hello'
chunk_id = None
summer.append_chunk(chunk, chunk_id)
self.assertEqual(
summer.get_checksum(),
'5d41402abc4b2a76b9719d911017c592')
def test_computes_checksum_for_sha512(self):
repo = FakeRepository(obnamlib.REPO_FILE_SHA512)
summer = obnamlib.WholeFileCheckSummer(obnamlib.REPO_FILE_SHA512)
chunk = 'hello'
token = repo.prepare_chunk_for_indexes(chunk)
chunk_id = '123'
summer.append_chunk(chunk, chunk_id)
expected = hashlib.sha512('{},{};'.format(len(chunk), chunk_id))
self.assertEqual(summer.get_checksum(), expected.hexdigest())
class FakeRepository(object):
def __init__(self, file_key):
self._file_key = file_key
def get_client_checksum_key(self, client_name):
return self._file_key
def prepare_chunk_for_indexes(self, data):
if self._file_key is None:
return None
return 'fake checksum'
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