xref: /aosp_15_r20/external/brotli/python/tests/decompressor_test.py (revision f4ee7fba7774faf2a30f13154332c0a06550dbc4)
1*f4ee7fbaSAndroid Build Coastguard Worker# Copyright 2016 The Brotli Authors. All rights reserved.
2*f4ee7fbaSAndroid Build Coastguard Worker#
3*f4ee7fbaSAndroid Build Coastguard Worker# Distributed under MIT license.
4*f4ee7fbaSAndroid Build Coastguard Worker# See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
5*f4ee7fbaSAndroid Build Coastguard Worker
6*f4ee7fbaSAndroid Build Coastguard Workerimport functools
7*f4ee7fbaSAndroid Build Coastguard Workerimport unittest
8*f4ee7fbaSAndroid Build Coastguard Worker
9*f4ee7fbaSAndroid Build Coastguard Workerfrom . import _test_utils
10*f4ee7fbaSAndroid Build Coastguard Workerimport brotli
11*f4ee7fbaSAndroid Build Coastguard Worker
12*f4ee7fbaSAndroid Build Coastguard Worker
13*f4ee7fbaSAndroid Build Coastguard Workerdef _get_original_name(test_data):
14*f4ee7fbaSAndroid Build Coastguard Worker    return test_data.split('.compressed')[0]
15*f4ee7fbaSAndroid Build Coastguard Worker
16*f4ee7fbaSAndroid Build Coastguard Worker
17*f4ee7fbaSAndroid Build Coastguard Workerclass TestDecompressor(_test_utils.TestCase):
18*f4ee7fbaSAndroid Build Coastguard Worker
19*f4ee7fbaSAndroid Build Coastguard Worker    CHUNK_SIZE = 1
20*f4ee7fbaSAndroid Build Coastguard Worker
21*f4ee7fbaSAndroid Build Coastguard Worker    def setUp(self):
22*f4ee7fbaSAndroid Build Coastguard Worker        self.decompressor = brotli.Decompressor()
23*f4ee7fbaSAndroid Build Coastguard Worker
24*f4ee7fbaSAndroid Build Coastguard Worker    def tearDown(self):
25*f4ee7fbaSAndroid Build Coastguard Worker        self.decompressor = None
26*f4ee7fbaSAndroid Build Coastguard Worker
27*f4ee7fbaSAndroid Build Coastguard Worker    def _check_decompression(self, test_data):
28*f4ee7fbaSAndroid Build Coastguard Worker        # Verify decompression matches the original.
29*f4ee7fbaSAndroid Build Coastguard Worker        temp_uncompressed = _test_utils.get_temp_uncompressed_name(test_data)
30*f4ee7fbaSAndroid Build Coastguard Worker        original = _get_original_name(test_data)
31*f4ee7fbaSAndroid Build Coastguard Worker        self.assertFilesMatch(temp_uncompressed, original)
32*f4ee7fbaSAndroid Build Coastguard Worker
33*f4ee7fbaSAndroid Build Coastguard Worker    def _decompress(self, test_data):
34*f4ee7fbaSAndroid Build Coastguard Worker        temp_uncompressed = _test_utils.get_temp_uncompressed_name(test_data)
35*f4ee7fbaSAndroid Build Coastguard Worker        with open(temp_uncompressed, 'wb') as out_file:
36*f4ee7fbaSAndroid Build Coastguard Worker            with open(test_data, 'rb') as in_file:
37*f4ee7fbaSAndroid Build Coastguard Worker                read_chunk = functools.partial(in_file.read, self.CHUNK_SIZE)
38*f4ee7fbaSAndroid Build Coastguard Worker                for data in iter(read_chunk, b''):
39*f4ee7fbaSAndroid Build Coastguard Worker                    out_file.write(self.decompressor.process(data))
40*f4ee7fbaSAndroid Build Coastguard Worker        self.assertTrue(self.decompressor.is_finished())
41*f4ee7fbaSAndroid Build Coastguard Worker
42*f4ee7fbaSAndroid Build Coastguard Worker    def _test_decompress(self, test_data):
43*f4ee7fbaSAndroid Build Coastguard Worker        self._decompress(test_data)
44*f4ee7fbaSAndroid Build Coastguard Worker        self._check_decompression(test_data)
45*f4ee7fbaSAndroid Build Coastguard Worker
46*f4ee7fbaSAndroid Build Coastguard Worker    def test_garbage_appended(self):
47*f4ee7fbaSAndroid Build Coastguard Worker        with self.assertRaises(brotli.error):
48*f4ee7fbaSAndroid Build Coastguard Worker            self.decompressor.process(brotli.compress(b'a') + b'a')
49*f4ee7fbaSAndroid Build Coastguard Worker
50*f4ee7fbaSAndroid Build Coastguard Worker    def test_already_finished(self):
51*f4ee7fbaSAndroid Build Coastguard Worker        self.decompressor.process(brotli.compress(b'a'))
52*f4ee7fbaSAndroid Build Coastguard Worker        with self.assertRaises(brotli.error):
53*f4ee7fbaSAndroid Build Coastguard Worker            self.decompressor.process(b'a')
54*f4ee7fbaSAndroid Build Coastguard Worker
55*f4ee7fbaSAndroid Build Coastguard Worker
56*f4ee7fbaSAndroid Build Coastguard Worker_test_utils.generate_test_methods(TestDecompressor, for_decompression=True)
57*f4ee7fbaSAndroid Build Coastguard Worker
58*f4ee7fbaSAndroid Build Coastguard Workerif __name__ == '__main__':
59*f4ee7fbaSAndroid Build Coastguard Worker    unittest.main()
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