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1# Copyright 2016 The Brotli Authors. All rights reserved.
2#
3# Distributed under MIT license.
4# See file LICENSE for detail or copy at https://opensource.org/licenses/MIT
5
6import subprocess
7import unittest
8
9from . import _test_utils
10
11BRO_ARGS = _test_utils.BRO_ARGS
12TEST_ENV = _test_utils.TEST_ENV
13
14
15def _get_original_name(test_data):
16    return test_data.split('.compressed')[0]
17
18
19class TestBroDecompress(_test_utils.TestCase):
20
21    def _check_decompression(self, test_data):
22        # Verify decompression matches the original.
23        temp_uncompressed = _test_utils.get_temp_uncompressed_name(test_data)
24        original = _get_original_name(test_data)
25        self.assertFilesMatch(temp_uncompressed, original)
26
27    def _decompress_file(self, test_data):
28        temp_uncompressed = _test_utils.get_temp_uncompressed_name(test_data)
29        args = BRO_ARGS + ['-f', '-d', '-i', test_data, '-o', temp_uncompressed]
30        subprocess.check_call(args, env=TEST_ENV)
31
32    def _decompress_pipe(self, test_data):
33        temp_uncompressed = _test_utils.get_temp_uncompressed_name(test_data)
34        args = BRO_ARGS + ['-d']
35        with open(temp_uncompressed, 'wb') as out_file:
36            with open(test_data, 'rb') as in_file:
37                subprocess.check_call(
38                    args, stdin=in_file, stdout=out_file, env=TEST_ENV)
39
40    def _test_decompress_file(self, test_data):
41        self._decompress_file(test_data)
42        self._check_decompression(test_data)
43
44    def _test_decompress_pipe(self, test_data):
45        self._decompress_pipe(test_data)
46        self._check_decompression(test_data)
47
48
49_test_utils.generate_test_methods(TestBroDecompress, for_decompression=True)
50
51
52class TestBroCompress(_test_utils.TestCase):
53
54    VARIANTS = {'quality': (1, 6, 9, 11), 'lgwin': (10, 15, 20, 24)}
55
56    def _check_decompression(self, test_data, **kwargs):
57        # Write decompression to temp file and verify it matches the original.
58        temp_uncompressed = _test_utils.get_temp_uncompressed_name(test_data)
59        temp_compressed = _test_utils.get_temp_compressed_name(test_data)
60        original = test_data
61        args = BRO_ARGS + ['-f', '-d']
62        args.extend(['-i', temp_compressed, '-o', temp_uncompressed])
63        subprocess.check_call(args, env=TEST_ENV)
64        self.assertFilesMatch(temp_uncompressed, original)
65
66    def _compress_file(self, test_data, **kwargs):
67        temp_compressed = _test_utils.get_temp_compressed_name(test_data)
68        args = BRO_ARGS + ['-f']
69        if 'quality' in kwargs:
70            args.extend(['-q', str(kwargs['quality'])])
71        if 'lgwin' in kwargs:
72            args.extend(['--lgwin', str(kwargs['lgwin'])])
73        args.extend(['-i', test_data, '-o', temp_compressed])
74        subprocess.check_call(args, env=TEST_ENV)
75
76    def _compress_pipe(self, test_data, **kwargs):
77        temp_compressed = _test_utils.get_temp_compressed_name(test_data)
78        args = BRO_ARGS
79        if 'quality' in kwargs:
80            args.extend(['-q', str(kwargs['quality'])])
81        if 'lgwin' in kwargs:
82            args.extend(['--lgwin', str(kwargs['lgwin'])])
83        with open(temp_compressed, 'wb') as out_file:
84            with open(test_data, 'rb') as in_file:
85                subprocess.check_call(
86                    args, stdin=in_file, stdout=out_file, env=TEST_ENV)
87
88    def _test_compress_file(self, test_data, **kwargs):
89        self._compress_file(test_data, **kwargs)
90        self._check_decompression(test_data)
91
92    def _test_compress_pipe(self, test_data, **kwargs):
93        self._compress_pipe(test_data, **kwargs)
94        self._check_decompression(test_data)
95
96
97_test_utils.generate_test_methods(
98    TestBroCompress, variants=TestBroCompress.VARIANTS)
99
100if __name__ == '__main__':
101    unittest.main()
102