# Copyright 2016 The Brotli Authors. All rights reserved.
#
# Distributed under MIT license.
# See file LICENSE for detail or copy at https://opensource.org/licenses/MIT

import unittest

import brotli

from . import _test_utils


def _get_original_name(test_data):
  return test_data.split('.compressed')[0]


class TestDecompress(_test_utils.TestCase):

  def _check_decompression(self, test_data):
    # Verify decompression matches the original.
    temp_uncompressed = _test_utils.get_temp_uncompressed_name(test_data)
    original = _get_original_name(test_data)
    self.assert_files_match(temp_uncompressed, original)

  def _decompress(self, test_data):
    temp_uncompressed = _test_utils.get_temp_uncompressed_name(test_data)
    with open(temp_uncompressed, 'wb') as out_file:
      with open(test_data, 'rb') as in_file:
        out_file.write(brotli.decompress(in_file.read()))

  def _test_decompress(self, test_data):
    self._decompress(test_data)
    self._check_decompression(test_data)

  def test_garbage_appended(self):
    with self.assertRaises(brotli.error):
      brotli.decompress(brotli.compress(b'a') + b'a')


_test_utils.generate_test_methods(TestDecompress, for_decompression=True)

if __name__ == '__main__':
  unittest.main()