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#!/usr/bin/python
# -*- coding: utf-8 -*-
"""Tests for the encoding manager."""
import unittest
from dfvfs.encoding import base16_decoder
from dfvfs.encoding import decoder
from dfvfs.encoding import manager
from dfvfs.lib import definitions
from tests import test_lib as shared_test_lib
class TestDecoder(decoder.Decoder):
"""Class that implements a test decoder."""
ENCODING_METHOD = u'test'
def Decode(self, unused_encoded_data):
"""Decode the encoded data.
Args:
encoded_data: a byte string containing the encoded data.
Returns:
A tuple containing a byte string of the decoded data and
the remaining encoded data.
"""
return b'', b''
class EncodingManagerTest(shared_test_lib.BaseTestCase):
"""Class to test the encoding manager."""
def testDecoderRegistration(self):
"""Tests the DeregisterDecoder and DeregisterDecoder functions."""
# pylint: disable=protected-access
number_of_decoders = len(manager.EncodingManager._decoders)
manager.EncodingManager.RegisterDecoder(TestDecoder)
self.assertEqual(
len(manager.EncodingManager._decoders),
number_of_decoders + 1)
with self.assertRaises(KeyError):
manager.EncodingManager.RegisterDecoder(TestDecoder)
manager.EncodingManager.DeregisterDecoder(TestDecoder)
self.assertEqual(
len(manager.EncodingManager._decoders), number_of_decoders)
def testGetDecoder(self):
"""Function to test the GetDecoder function."""
decoder_object = manager.EncodingManager.GetDecoder(
definitions.ENCODING_METHOD_BASE16)
self.assertIsInstance(decoder_object, base16_decoder.Base16Decoder)
decoder_object = manager.EncodingManager.GetDecoder(u'bogus')
self.assertIsNone(decoder_object)
if __name__ == '__main__':
unittest.main()
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