jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2020-2021, the SerenityOS developers.
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <LibTest/TestCase.h>
8
9#include <AK/Array.h>
10#include <AK/Random.h>
11#include <LibCompress/Gzip.h>
12
13TEST_CASE(gzip_decompress_simple)
14{
15 Array<u8, 33> const compressed {
16 0x1f, 0x8b, 0x08, 0x00, 0x77, 0xff, 0x47, 0x5f, 0x02, 0xff, 0x2b, 0xcf,
17 0x2f, 0x4a, 0x31, 0x54, 0x48, 0x4c, 0x4a, 0x56, 0x28, 0x07, 0xb2, 0x8c,
18 0x00, 0xc2, 0x1d, 0x22, 0x15, 0x0f, 0x00, 0x00, 0x00
19 };
20
21 const u8 uncompressed[] = "word1 abc word2";
22
23 auto const decompressed = Compress::GzipDecompressor::decompress_all(compressed);
24 EXPECT(decompressed.value().bytes() == (ReadonlyBytes { uncompressed, sizeof(uncompressed) - 1 }));
25}
26
27TEST_CASE(gzip_decompress_multiple_members)
28{
29 Array<u8, 52> const compressed {
30 0x1f, 0x8b, 0x08, 0x00, 0xe0, 0x03, 0x48, 0x5f, 0x02, 0xff, 0x4b, 0x4c,
31 0x4a, 0x4e, 0x4c, 0x4a, 0x06, 0x00, 0x4c, 0x99, 0x6e, 0x72, 0x06, 0x00,
32 0x00, 0x00, 0x1f, 0x8b, 0x08, 0x00, 0xe0, 0x03, 0x48, 0x5f, 0x02, 0xff,
33 0x4b, 0x4c, 0x4a, 0x4e, 0x4c, 0x4a, 0x06, 0x00, 0x4c, 0x99, 0x6e, 0x72,
34 0x06, 0x00, 0x00, 0x00
35 };
36
37 const u8 uncompressed[] = "abcabcabcabc";
38
39 auto const decompressed = Compress::GzipDecompressor::decompress_all(compressed);
40 EXPECT(decompressed.value().bytes() == (ReadonlyBytes { uncompressed, sizeof(uncompressed) - 1 }));
41}
42
43TEST_CASE(gzip_decompress_zeroes)
44{
45 Array<u8, 161> const compressed {
46 0x1f, 0x8b, 0x08, 0x00, 0x6e, 0x7a, 0x4b, 0x5f, 0x02, 0xff, 0xed, 0xc1,
47 0x31, 0x01, 0x00, 0x00, 0x00, 0xc2, 0xa0, 0xf5, 0x4f, 0xed, 0x61, 0x0d,
48 0xa0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
49 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
50 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
51 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
52 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
53 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
54 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
55 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
56 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
57 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
58 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x6e, 0xcd, 0xcd, 0xe8,
59 0x7e, 0x00, 0x00, 0x02, 0x00
60 };
61
62 Array<u8, 128 * 1024> const uncompressed = { 0 };
63
64 auto const decompressed = Compress::GzipDecompressor::decompress_all(compressed);
65 EXPECT(uncompressed == decompressed.value().bytes());
66}
67
68TEST_CASE(gzip_decompress_repeat_around_buffer)
69{
70 Array<u8, 70> const compressed {
71 0x1f, 0x8b, 0x08, 0x00, 0xc6, 0x74, 0x53, 0x5f, 0x02, 0xff, 0xed, 0xc1,
72 0x01, 0x0d, 0x00, 0x00, 0x0c, 0x02, 0xa0, 0xdb, 0xbf, 0xf4, 0x37, 0x6b,
73 0x08, 0x24, 0xdb, 0x0e, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
74 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
75 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x80, 0xca,
76 0xb8, 0x07, 0xcd, 0xe5, 0x38, 0xfa, 0x00, 0x80, 0x00, 0x00
77 };
78
79 Array<u8, 0x8000> uncompressed;
80 uncompressed.span().slice(0x0000, 0x0100).fill(1);
81 uncompressed.span().slice(0x0100, 0x7e00).fill(0);
82 uncompressed.span().slice(0x7f00, 0x0100).fill(1);
83
84 auto const decompressed = Compress::GzipDecompressor::decompress_all(compressed);
85 EXPECT(uncompressed == decompressed.value().bytes());
86}
87
88TEST_CASE(gzip_round_trip)
89{
90 auto original = ByteBuffer::create_uninitialized(1024).release_value();
91 fill_with_random(original.data(), 1024);
92 auto compressed = Compress::GzipCompressor::compress_all(original);
93 EXPECT(!compressed.is_error());
94 auto uncompressed = Compress::GzipDecompressor::decompress_all(compressed.value());
95 EXPECT(!uncompressed.is_error());
96 EXPECT(uncompressed.value() == original);
97}