string_test.c

  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");