jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2020-2022, the SerenityOS developers.
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <LibTest/TestCase.h>
8
9#include <AK/DeprecatedString.h>
10#include <AK/MemMem.h>
11#include <AK/Memory.h>
12
13TEST_CASE(bitap)
14{
15 Array<u8, 8> haystack { 1, 0, 1, 2, 3, 4, 5, 0 };
16 Array<u8, 4> needle_0 { 2, 3, 4, 5 };
17 Array<u8, 4> needle_1 { 1, 2, 3, 4 };
18 Array<u8, 4> needle_2 { 3, 4, 5, 0 };
19 Array<u8, 4> needle_3 { 3, 4, 5, 6 };
20
21 auto result_0 = AK::memmem(haystack.data(), haystack.size(), needle_0.data(), needle_0.size());
22 auto result_1 = AK::memmem(haystack.data(), haystack.size(), needle_1.data(), needle_1.size());
23 auto result_2 = AK::memmem(haystack.data(), haystack.size(), needle_2.data(), needle_2.size());
24 auto result_3 = AK::memmem(haystack.data(), haystack.size(), needle_3.data(), needle_3.size());
25
26 EXPECT_EQ(result_0, &haystack[3]);
27 EXPECT_EQ(result_1, &haystack[2]);
28 EXPECT_EQ(result_2, &haystack[4]);
29 EXPECT_EQ(result_3, nullptr);
30
31 auto haystack_string = "Main function must return c_int\n"sv;
32 auto needle_string = "Main function must return c_int"sv;
33
34 auto result = AK::Detail::bitap_bitwise(haystack_string.characters_without_null_termination(), haystack_string.length(), needle_string.characters_without_null_termination(), needle_string.length());
35
36 EXPECT_NE(result, nullptr);
37}
38
39TEST_CASE(kmp_one_chunk)
40{
41 Array<u8, 8> haystack { 1, 0, 1, 2, 3, 4, 5, 0 };
42 Array<Array<u8, 8>, 1> haystack_arr { haystack };
43 Array<u8, 4> needle_0 { 2, 3, 4, 5 };
44 Array<u8, 4> needle_1 { 1, 2, 3, 4 };
45 Array<u8, 4> needle_2 { 3, 4, 5, 0 };
46 Array<u8, 4> needle_3 { 3, 4, 5, 6 };
47
48 auto result_0 = AK::memmem(haystack_arr.begin(), haystack_arr.end(), needle_0);
49 auto result_1 = AK::memmem(haystack_arr.begin(), haystack_arr.end(), needle_1);
50 auto result_2 = AK::memmem(haystack_arr.begin(), haystack_arr.end(), needle_2);
51 auto result_3 = AK::memmem(haystack_arr.begin(), haystack_arr.end(), needle_3);
52
53 EXPECT_EQ(result_0.value_or(9), 3u);
54 EXPECT_EQ(result_1.value_or(9), 2u);
55 EXPECT_EQ(result_2.value_or(9), 4u);
56 EXPECT(!result_3.has_value());
57}
58
59TEST_CASE(kmp_two_chunks)
60{
61 Array<u8, 4> haystack_first_half { 1, 0, 1, 2 }, haystack_second_half { 3, 4, 5, 0 };
62 Array<Array<u8, 4>, 2> haystack { haystack_first_half, haystack_second_half };
63 Array<u8, 4> needle_0 { 2, 3, 4, 5 };
64 Array<u8, 4> needle_1 { 1, 2, 3, 4 };
65 Array<u8, 4> needle_2 { 3, 4, 5, 0 };
66 Array<u8, 4> needle_3 { 3, 4, 5, 6 };
67
68 auto result_0 = AK::memmem(haystack.begin(), haystack.end(), needle_0);
69 auto result_1 = AK::memmem(haystack.begin(), haystack.end(), needle_1);
70 auto result_2 = AK::memmem(haystack.begin(), haystack.end(), needle_2);
71 auto result_3 = AK::memmem(haystack.begin(), haystack.end(), needle_3);
72
73 EXPECT_EQ(result_0.value_or(9), 3u);
74 EXPECT_EQ(result_1.value_or(9), 2u);
75 EXPECT_EQ(result_2.value_or(9), 4u);
76 EXPECT(!result_3.has_value());
77}
78
79TEST_CASE(timing_safe_compare)
80{
81 DeprecatedString data_set = "abcdefghijklmnopqrstuvwxyz123456789";
82 EXPECT_EQ(true, AK::timing_safe_compare(data_set.characters(), data_set.characters(), data_set.length()));
83
84 DeprecatedString reversed = data_set.reverse();
85 EXPECT_EQ(false, AK::timing_safe_compare(data_set.characters(), reversed.characters(), reversed.length()));
86}