Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1// SPDX-License-Identifier: GPL-2.0
2/*
3 * KUnit tests for HFS string operations
4 *
5 * Copyright (C) 2025 Viacheslav Dubeyko <slava@dubeyko.com>
6 */
7
8#include <kunit/test.h>
9#include <linux/dcache.h>
10#include "hfs_fs.h"
11
12/* Test hfs_strcmp function */
13static void hfs_strcmp_test(struct kunit *test)
14{
15 /* Test equal strings */
16 KUNIT_EXPECT_EQ(test, 0, hfs_strcmp("hello", 5, "hello", 5));
17 KUNIT_EXPECT_EQ(test, 0, hfs_strcmp("test", 4, "test", 4));
18 KUNIT_EXPECT_EQ(test, 0, hfs_strcmp("", 0, "", 0));
19
20 /* Test unequal strings */
21 KUNIT_EXPECT_NE(test, 0, hfs_strcmp("hello", 5, "world", 5));
22 KUNIT_EXPECT_NE(test, 0, hfs_strcmp("test", 4, "testing", 7));
23
24 /* Test different lengths */
25 KUNIT_EXPECT_LT(test, hfs_strcmp("test", 4, "testing", 7), 0);
26 KUNIT_EXPECT_GT(test, hfs_strcmp("testing", 7, "test", 4), 0);
27
28 /* Test case insensitive comparison (HFS should handle case) */
29 KUNIT_EXPECT_EQ(test, 0, hfs_strcmp("Test", 4, "TEST", 4));
30 KUNIT_EXPECT_EQ(test, 0, hfs_strcmp("hello", 5, "HELLO", 5));
31
32 /* Test with special characters */
33 KUNIT_EXPECT_EQ(test, 0, hfs_strcmp("file.txt", 8, "file.txt", 8));
34 KUNIT_EXPECT_NE(test, 0, hfs_strcmp("file.txt", 8, "file.dat", 8));
35
36 /* Test boundary cases */
37 KUNIT_EXPECT_EQ(test, 0, hfs_strcmp("a", 1, "a", 1));
38 KUNIT_EXPECT_NE(test, 0, hfs_strcmp("a", 1, "b", 1));
39}
40
41/* Test hfs_hash_dentry function */
42static void hfs_hash_dentry_test(struct kunit *test)
43{
44 struct qstr test_name1, test_name2, test_name3;
45 struct dentry dentry = {};
46 char name1[] = "testfile";
47 char name2[] = "TestFile";
48 char name3[] = "different";
49
50 /* Initialize test strings */
51 test_name1.name = name1;
52 test_name1.len = strlen(name1);
53 test_name1.hash = 0;
54
55 test_name2.name = name2;
56 test_name2.len = strlen(name2);
57 test_name2.hash = 0;
58
59 test_name3.name = name3;
60 test_name3.len = strlen(name3);
61 test_name3.hash = 0;
62
63 /* Test hashing */
64 KUNIT_EXPECT_EQ(test, 0, hfs_hash_dentry(&dentry, &test_name1));
65 KUNIT_EXPECT_EQ(test, 0, hfs_hash_dentry(&dentry, &test_name2));
66 KUNIT_EXPECT_EQ(test, 0, hfs_hash_dentry(&dentry, &test_name3));
67
68 /* Case insensitive names should hash the same */
69 KUNIT_EXPECT_EQ(test, test_name1.hash, test_name2.hash);
70
71 /* Different names should have different hashes */
72 KUNIT_EXPECT_NE(test, test_name1.hash, test_name3.hash);
73}
74
75/* Test hfs_compare_dentry function */
76static void hfs_compare_dentry_test(struct kunit *test)
77{
78 struct qstr test_name;
79 struct dentry dentry = {};
80 char name[] = "TestFile";
81
82 test_name.name = name;
83 test_name.len = strlen(name);
84
85 /* Test exact match */
86 KUNIT_EXPECT_EQ(test, 0, hfs_compare_dentry(&dentry, 8,
87 "TestFile", &test_name));
88
89 /* Test case insensitive match */
90 KUNIT_EXPECT_EQ(test, 0, hfs_compare_dentry(&dentry, 8,
91 "testfile", &test_name));
92 KUNIT_EXPECT_EQ(test, 0, hfs_compare_dentry(&dentry, 8,
93 "TESTFILE", &test_name));
94
95 /* Test different names */
96 KUNIT_EXPECT_EQ(test, 1, hfs_compare_dentry(&dentry, 8,
97 "DiffFile", &test_name));
98
99 /* Test different lengths */
100 KUNIT_EXPECT_EQ(test, 1, hfs_compare_dentry(&dentry, 7,
101 "TestFil", &test_name));
102 KUNIT_EXPECT_EQ(test, 1, hfs_compare_dentry(&dentry, 9,
103 "TestFiles", &test_name));
104
105 /* Test empty string */
106 test_name.name = "";
107 test_name.len = 0;
108 KUNIT_EXPECT_EQ(test, 0, hfs_compare_dentry(&dentry, 0, "", &test_name));
109
110 /* Test HFS_NAMELEN boundary */
111 test_name.name = "This_is_a_very_long_filename_that_exceeds_normal_limits";
112 test_name.len = strlen(test_name.name);
113 KUNIT_EXPECT_EQ(test, 0, hfs_compare_dentry(&dentry, HFS_NAMELEN,
114 "This_is_a_very_long_filename_th", &test_name));
115}
116
117static struct kunit_case hfs_string_test_cases[] = {
118 KUNIT_CASE(hfs_strcmp_test),
119 KUNIT_CASE(hfs_hash_dentry_test),
120 KUNIT_CASE(hfs_compare_dentry_test),
121 {}
122};
123
124static struct kunit_suite hfs_string_test_suite = {
125 .name = "hfs_string",
126 .test_cases = hfs_string_test_cases,
127};
128
129kunit_test_suite(hfs_string_test_suite);
130
131MODULE_DESCRIPTION("KUnit tests for HFS string operations");
132MODULE_LICENSE("GPL");
133MODULE_IMPORT_NS("EXPORTED_FOR_KUNIT_TESTING");