jcs.org
Serenity Operating System
1/*
2 * Copyright (c) 2020, Ben Wiederhake <BenWiederhake.GitHub@gmx.de>
3 *
4 * SPDX-License-Identifier: BSD-2-Clause
5 */
6
7#include <LibTest/TestCase.h>
8
9#include <AK/NumberFormat.h>
10
11/*
12 * These tests are mostly meant as a rough sanity-check, to see whether
13 * human_readable_size() crashes or does something very silly. That, however,
14 * is a fuzzy human term, so these tests have to hard-code the exact expected
15 * strings.
16 *
17 * Please feel free to tweak human_readable_size()'s behavior, and update the
18 * "expected" strings below.
19 */
20
21TEST_CASE(golden_path)
22{
23 EXPECT_EQ(human_readable_size(0), "0 B");
24 EXPECT_EQ(human_readable_size(123), "123 B");
25 EXPECT_EQ(human_readable_size(123 * KiB), "123.0 KiB");
26 EXPECT_EQ(human_readable_size(123 * MiB), "123.0 MiB");
27 EXPECT_EQ(human_readable_size(2 * GiB), "2.0 GiB");
28}
29
30TEST_CASE(border_B_KiB)
31{
32 EXPECT_EQ(human_readable_size(1000), "1000 B");
33 EXPECT_EQ(human_readable_size(1023), "1023 B");
34 // KiB = 1024
35 EXPECT_EQ(human_readable_size(1024), "1.0 KiB");
36 EXPECT_EQ(human_readable_size(1025), "1.0 KiB");
37}
38
39TEST_CASE(fraction_KiB)
40{
41 EXPECT_EQ(human_readable_size(1050), "1.0 KiB");
42 EXPECT_EQ(human_readable_size(1075), "1.0 KiB");
43 // 1024 * 1.05 = 1075.2
44 EXPECT_EQ(human_readable_size(1076), "1.0 KiB");
45
46 EXPECT_EQ(human_readable_size(1100), "1.0 KiB");
47
48 EXPECT_EQ(human_readable_size(1126), "1.0 KiB");
49 // 1024 * 1.1 = 1126.4
50 EXPECT_EQ(human_readable_size(1127), "1.1 KiB");
51 EXPECT_EQ(human_readable_size(1146), "1.1 KiB");
52}
53
54TEST_CASE(border_KiB_MiB)
55{
56 EXPECT_EQ(human_readable_size(1000 * KiB), "1000.0 KiB");
57 EXPECT_EQ(human_readable_size(1024 * KiB - 1), "1023.9 KiB");
58 // MiB
59 EXPECT_EQ(human_readable_size(1024 * KiB), "1.0 MiB");
60 EXPECT_EQ(human_readable_size(1024 * KiB + 1), "1.0 MiB");
61}
62
63TEST_CASE(fraction_MiB)
64{
65 EXPECT_EQ(human_readable_size(1069547), "1.0 MiB");
66 EXPECT_EQ(human_readable_size(1101004), "1.0 MiB");
67 // 1024 * 1024 * 1.05 = 1101004.8
68 EXPECT_EQ(human_readable_size(1101005), "1.0 MiB");
69 EXPECT_EQ(human_readable_size(1101006), "1.0 MiB");
70
71 EXPECT_EQ(human_readable_size(1120000), "1.0 MiB");
72
73 EXPECT_EQ(human_readable_size(1153433), "1.0 MiB");
74 // 1024 * 1024 * 1.1 = 1153433.6
75 EXPECT_EQ(human_readable_size(1153434), "1.1 MiB");
76}
77
78TEST_CASE(border_MiB_GiB)
79{
80 EXPECT_EQ(human_readable_size(1000 * MiB), "1000.0 MiB");
81 EXPECT_EQ(human_readable_size(1024 * MiB - 1), "1023.9 MiB");
82 EXPECT_EQ(human_readable_size(1024 * MiB), "1.0 GiB");
83 EXPECT_EQ(human_readable_size(1024 * MiB + 1), "1.0 GiB");
84}
85
86TEST_CASE(fraction_GiB)
87{
88 EXPECT_EQ(human_readable_size(1095216660), "1.0 GiB");
89 EXPECT_EQ(human_readable_size(1127428915), "1.0 GiB");
90 // 1024 * 1024 * 1024 * 1.05 = 1127428915.2
91 EXPECT_EQ(human_readable_size(1127428916), "1.0 GiB");
92 EXPECT_EQ(human_readable_size(1127536289), "1.0 GiB");
93
94 EXPECT_EQ(human_readable_size(1154272461), "1.0 GiB");
95
96 EXPECT_EQ(human_readable_size(1181115968), "1.0 GiB");
97 EXPECT_EQ(human_readable_size(1181115969), "1.0 GiB");
98 EXPECT_EQ(human_readable_size(1181116000), "1.0 GiB");
99 EXPECT_EQ(human_readable_size(1181116006), "1.0 GiB");
100 // 1024 * 1024 * 1024 * 1.1 = 1181116006.4
101 EXPECT_EQ(human_readable_size(1181116007), "1.1 GiB");
102 EXPECT_EQ(human_readable_size(1202590842), "1.1 GiB");
103}
104
105TEST_CASE(extremes_4byte)
106{
107 EXPECT_EQ(human_readable_size(0x7fffffff), "1.9 GiB");
108 EXPECT_EQ(human_readable_size(0x80000000), "2.0 GiB");
109 EXPECT_EQ(human_readable_size(0xffffffff), "3.9 GiB");
110}
111
112TEST_CASE(extremes_8byte)
113{
114 if constexpr (sizeof(size_t) == 8) {
115 warnln("(Running 8-byte-size_t test)");
116 EXPECT_EQ(human_readable_size(0x100000000ULL), "4.0 GiB");
117 EXPECT_EQ(human_readable_size(0x100000001ULL), "4.0 GiB");
118 EXPECT_EQ(human_readable_size(0x800000000ULL), "32.0 GiB");
119 EXPECT_EQ(human_readable_size(0x10000000000ULL), "1.0 TiB");
120 EXPECT_EQ(human_readable_size(0x4000000000000ULL), "1.0 PiB");
121 EXPECT_EQ(human_readable_size(0x7fffffffffffffffULL), "7.9 EiB");
122 EXPECT_EQ(human_readable_size(0x8000000000000000ULL), "8.0 EiB");
123 EXPECT_EQ(human_readable_size(0xffffffffffffffffULL), "15.9 EiB");
124 } else {
125 warnln("(Skipping 8-byte-size_t test on 32-bit platform)");
126 }
127}
128
129TEST_CASE(base10_units)
130{
131 EXPECT_EQ(human_readable_size(999, AK::HumanReadableBasedOn::Base10), "999 B");
132 EXPECT_EQ(human_readable_size(1024, AK::HumanReadableBasedOn::Base10), "1.0 KB");
133 EXPECT_EQ(human_readable_size(1100, AK::HumanReadableBasedOn::Base10), "1.1 KB");
134 EXPECT_EQ(human_readable_size(1000000, AK::HumanReadableBasedOn::Base10), "1.0 MB");
135}