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# -*- coding: utf-8 -*-
#
# Copyright 2011 Sybren A. Stüvel <sybren@stuvel.eu>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
'''Tests varblock operations.'''
try:
from StringIO import StringIO as BytesIO
except ImportError:
from io import BytesIO
import unittest
import rsa
from rsa._compat import b
from rsa import varblock
class VarintTest(unittest.TestCase):
def test_read_varint(self):
encoded = b('\xac\x02crummy')
infile = BytesIO(encoded)
(decoded, read) = varblock.read_varint(infile)
# Test the returned values
self.assertEqual(300, decoded)
self.assertEqual(2, read)
# The rest of the file should be untouched
self.assertEqual(b('crummy'), infile.read())
def test_read_zero(self):
encoded = b('\x00crummy')
infile = BytesIO(encoded)
(decoded, read) = varblock.read_varint(infile)
# Test the returned values
self.assertEqual(0, decoded)
self.assertEqual(1, read)
# The rest of the file should be untouched
self.assertEqual(b('crummy'), infile.read())
def test_write_varint(self):
expected = b('\xac\x02')
outfile = BytesIO()
written = varblock.write_varint(outfile, 300)
# Test the returned values
self.assertEqual(expected, outfile.getvalue())
self.assertEqual(2, written)
def test_write_zero(self):
outfile = BytesIO()
written = varblock.write_varint(outfile, 0)
# Test the returned values
self.assertEqual(b('\x00'), outfile.getvalue())
self.assertEqual(1, written)
class VarblockTest(unittest.TestCase):
def test_yield_varblock(self):
infile = BytesIO(b('\x01\x0512345\x06Sybren'))
varblocks = list(varblock.yield_varblocks(infile))
self.assertEqual([b('12345'), b('Sybren')], varblocks)
class FixedblockTest(unittest.TestCase):
def test_yield_fixedblock(self):
infile = BytesIO(b('123456Sybren'))
fixedblocks = list(varblock.yield_fixedblocks(infile, 6))
self.assertEqual([b('123456'), b('Sybren')], fixedblocks)
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