1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
2 /*
3 * Test cases for lib/string_helpers.c module.
4 */
5 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
6
7 #include <kunit/test.h>
8 #include <linux/array_size.h>
9 #include <linux/kernel.h>
10 #include <linux/random.h>
11 #include <linux/string.h>
12 #include <linux/string_helpers.h>
13
test_string_check_buf(struct kunit * test,const char * name,unsigned int flags,char * in,size_t p,char * out_real,size_t q_real,char * out_test,size_t q_test)14 static void test_string_check_buf(struct kunit *test,
15 const char *name, unsigned int flags,
16 char *in, size_t p,
17 char *out_real, size_t q_real,
18 char *out_test, size_t q_test)
19 {
20 KUNIT_ASSERT_EQ_MSG(test, q_real, q_test, "name:%s", name);
21 KUNIT_EXPECT_MEMEQ_MSG(test, out_test, out_real, q_test,
22 "name:%s", name);
23 }
24
25 struct test_string {
26 const char *in;
27 const char *out;
28 unsigned int flags;
29 };
30
31 static const struct test_string strings[] = {
32 {
33 .in = "\\f\\ \\n\\r\\t\\v",
34 .out = "\f\\ \n\r\t\v",
35 .flags = UNESCAPE_SPACE,
36 },
37 {
38 .in = "\\40\\1\\387\\0064\\05\\040\\8a\\110\\777",
39 .out = " \001\00387\0064\005 \\8aH?7",
40 .flags = UNESCAPE_OCTAL,
41 },
42 {
43 .in = "\\xv\\xa\\x2c\\xD\\x6f2",
44 .out = "\\xv\n,\ro2",
45 .flags = UNESCAPE_HEX,
46 },
47 {
48 .in = "\\h\\\\\\\"\\a\\e\\",
49 .out = "\\h\\\"\a\e\\",
50 .flags = UNESCAPE_SPECIAL,
51 },
52 };
53
test_string_unescape(struct kunit * test,const char * name,unsigned int flags,bool inplace)54 static void test_string_unescape(struct kunit *test,
55 const char *name, unsigned int flags,
56 bool inplace)
57 {
58 int q_real = 256;
59 char *in = kunit_kzalloc(test, q_real, GFP_KERNEL);
60 char *out_test = kunit_kzalloc(test, q_real, GFP_KERNEL);
61 char *out_real = kunit_kzalloc(test, q_real, GFP_KERNEL);
62 int i, p = 0, q_test = 0;
63
64 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, in);
65 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, out_test);
66 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, out_real);
67
68 for (i = 0; i < ARRAY_SIZE(strings); i++) {
69 const char *s = strings[i].in;
70 int len = strlen(strings[i].in);
71
72 /* Copy string to in buffer */
73 memcpy(&in[p], s, len);
74 p += len;
75
76 /* Copy expected result for given flags */
77 if (flags & strings[i].flags) {
78 s = strings[i].out;
79 len = strlen(strings[i].out);
80 }
81 memcpy(&out_test[q_test], s, len);
82 q_test += len;
83 }
84 in[p++] = '\0';
85
86 /* Call string_unescape and compare result */
87 if (inplace) {
88 memcpy(out_real, in, p);
89 if (flags == UNESCAPE_ANY)
90 q_real = string_unescape_any_inplace(out_real);
91 else
92 q_real = string_unescape_inplace(out_real, flags);
93 } else if (flags == UNESCAPE_ANY) {
94 q_real = string_unescape_any(in, out_real, q_real);
95 } else {
96 q_real = string_unescape(in, out_real, q_real, flags);
97 }
98
99 test_string_check_buf(test, name, flags, in, p - 1, out_real, q_real,
100 out_test, q_test);
101 }
102
103 struct test_string_1 {
104 const char *out;
105 unsigned int flags;
106 };
107
108 #define TEST_STRING_2_MAX_S1 32
109 struct test_string_2 {
110 const char *in;
111 struct test_string_1 s1[TEST_STRING_2_MAX_S1];
112 };
113
114 #define TEST_STRING_2_DICT_0 NULL
115 static const struct test_string_2 escape0[] = {{
116 .in = "\f\\ \n\r\t\v",
117 .s1 = {{
118 .out = "\\f\\ \\n\\r\\t\\v",
119 .flags = ESCAPE_SPACE,
120 },{
121 .out = "\\f\\134\\040\\n\\r\\t\\v",
122 .flags = ESCAPE_SPACE | ESCAPE_OCTAL,
123 },{
124 .out = "\\f\\x5c\\x20\\n\\r\\t\\v",
125 .flags = ESCAPE_SPACE | ESCAPE_HEX,
126 },{
127 /* terminator */
128 }}
129 },{
130 .in = "\\h\\\"\a\e\\",
131 .s1 = {{
132 .out = "\\\\h\\\\\\\"\\a\\e\\\\",
133 .flags = ESCAPE_SPECIAL,
134 },{
135 .out = "\\\\\\150\\\\\\\"\\a\\e\\\\",
136 .flags = ESCAPE_SPECIAL | ESCAPE_OCTAL,
137 },{
138 .out = "\\\\\\x68\\\\\\\"\\a\\e\\\\",
139 .flags = ESCAPE_SPECIAL | ESCAPE_HEX,
140 },{
141 /* terminator */
142 }}
143 },{
144 .in = "\eb \\C\007\"\x90\r]",
145 .s1 = {{
146 .out = "\eb \\C\007\"\x90\\r]",
147 .flags = ESCAPE_SPACE,
148 },{
149 .out = "\\eb \\\\C\\a\\\"\x90\r]",
150 .flags = ESCAPE_SPECIAL,
151 },{
152 .out = "\\eb \\\\C\\a\\\"\x90\\r]",
153 .flags = ESCAPE_SPACE | ESCAPE_SPECIAL,
154 },{
155 .out = "\\033\\142\\040\\134\\103\\007\\042\\220\\015\\135",
156 .flags = ESCAPE_OCTAL,
157 },{
158 .out = "\\033\\142\\040\\134\\103\\007\\042\\220\\r\\135",
159 .flags = ESCAPE_SPACE | ESCAPE_OCTAL,
160 },{
161 .out = "\\e\\142\\040\\\\\\103\\a\\\"\\220\\015\\135",
162 .flags = ESCAPE_SPECIAL | ESCAPE_OCTAL,
163 },{
164 .out = "\\e\\142\\040\\\\\\103\\a\\\"\\220\\r\\135",
165 .flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_OCTAL,
166 },{
167 .out = "\eb \\C\007\"\x90\r]",
168 .flags = ESCAPE_NP,
169 },{
170 .out = "\eb \\C\007\"\x90\\r]",
171 .flags = ESCAPE_SPACE | ESCAPE_NP,
172 },{
173 .out = "\\eb \\C\\a\"\x90\r]",
174 .flags = ESCAPE_SPECIAL | ESCAPE_NP,
175 },{
176 .out = "\\eb \\C\\a\"\x90\\r]",
177 .flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_NP,
178 },{
179 .out = "\\033b \\C\\007\"\\220\\015]",
180 .flags = ESCAPE_OCTAL | ESCAPE_NP,
181 },{
182 .out = "\\033b \\C\\007\"\\220\\r]",
183 .flags = ESCAPE_SPACE | ESCAPE_OCTAL | ESCAPE_NP,
184 },{
185 .out = "\\eb \\C\\a\"\\220\\r]",
186 .flags = ESCAPE_SPECIAL | ESCAPE_SPACE | ESCAPE_OCTAL |
187 ESCAPE_NP,
188 },{
189 .out = "\\x1bb \\C\\x07\"\\x90\\x0d]",
190 .flags = ESCAPE_NP | ESCAPE_HEX,
191 },{
192 /* terminator */
193 }}
194 },{
195 .in = "\007 \eb\"\x90\xCF\r",
196 .s1 = {{
197 .out = "\007 \eb\"\\220\\317\r",
198 .flags = ESCAPE_OCTAL | ESCAPE_NA,
199 },{
200 .out = "\007 \eb\"\\x90\\xcf\r",
201 .flags = ESCAPE_HEX | ESCAPE_NA,
202 },{
203 .out = "\007 \eb\"\x90\xCF\r",
204 .flags = ESCAPE_NA,
205 },{
206 /* terminator */
207 }}
208 },{
209 /* terminator */
210 }};
211
212 #define TEST_STRING_2_DICT_1 "b\\ \t\r\xCF"
213 static const struct test_string_2 escape1[] = {{
214 .in = "\f\\ \n\r\t\v",
215 .s1 = {{
216 .out = "\f\\134\\040\n\\015\\011\v",
217 .flags = ESCAPE_OCTAL,
218 },{
219 .out = "\f\\x5c\\x20\n\\x0d\\x09\v",
220 .flags = ESCAPE_HEX,
221 },{
222 .out = "\f\\134\\040\n\\015\\011\v",
223 .flags = ESCAPE_ANY | ESCAPE_APPEND,
224 },{
225 .out = "\\014\\134\\040\\012\\015\\011\\013",
226 .flags = ESCAPE_OCTAL | ESCAPE_APPEND | ESCAPE_NAP,
227 },{
228 .out = "\\x0c\\x5c\\x20\\x0a\\x0d\\x09\\x0b",
229 .flags = ESCAPE_HEX | ESCAPE_APPEND | ESCAPE_NAP,
230 },{
231 .out = "\f\\134\\040\n\\015\\011\v",
232 .flags = ESCAPE_OCTAL | ESCAPE_APPEND | ESCAPE_NA,
233 },{
234 .out = "\f\\x5c\\x20\n\\x0d\\x09\v",
235 .flags = ESCAPE_HEX | ESCAPE_APPEND | ESCAPE_NA,
236 },{
237 /* terminator */
238 }}
239 },{
240 .in = "\\h\\\"\a\xCF\e\\",
241 .s1 = {{
242 .out = "\\134h\\134\"\a\\317\e\\134",
243 .flags = ESCAPE_OCTAL,
244 },{
245 .out = "\\134h\\134\"\a\\317\e\\134",
246 .flags = ESCAPE_ANY | ESCAPE_APPEND,
247 },{
248 .out = "\\134h\\134\"\\007\\317\\033\\134",
249 .flags = ESCAPE_OCTAL | ESCAPE_APPEND | ESCAPE_NAP,
250 },{
251 .out = "\\134h\\134\"\a\\317\e\\134",
252 .flags = ESCAPE_OCTAL | ESCAPE_APPEND | ESCAPE_NA,
253 },{
254 /* terminator */
255 }}
256 },{
257 .in = "\eb \\C\007\"\x90\r]",
258 .s1 = {{
259 .out = "\e\\142\\040\\134C\007\"\x90\\015]",
260 .flags = ESCAPE_OCTAL,
261 },{
262 /* terminator */
263 }}
264 },{
265 .in = "\007 \eb\"\x90\xCF\r",
266 .s1 = {{
267 .out = "\007 \eb\"\x90\xCF\r",
268 .flags = ESCAPE_NA,
269 },{
270 .out = "\007 \eb\"\x90\xCF\r",
271 .flags = ESCAPE_SPACE | ESCAPE_NA,
272 },{
273 .out = "\007 \eb\"\x90\xCF\r",
274 .flags = ESCAPE_SPECIAL | ESCAPE_NA,
275 },{
276 .out = "\007 \eb\"\x90\xCF\r",
277 .flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_NA,
278 },{
279 .out = "\007 \eb\"\x90\\317\r",
280 .flags = ESCAPE_OCTAL | ESCAPE_NA,
281 },{
282 .out = "\007 \eb\"\x90\\317\r",
283 .flags = ESCAPE_SPACE | ESCAPE_OCTAL | ESCAPE_NA,
284 },{
285 .out = "\007 \eb\"\x90\\317\r",
286 .flags = ESCAPE_SPECIAL | ESCAPE_OCTAL | ESCAPE_NA,
287 },{
288 .out = "\007 \eb\"\x90\\317\r",
289 .flags = ESCAPE_ANY | ESCAPE_NA,
290 },{
291 .out = "\007 \eb\"\x90\\xcf\r",
292 .flags = ESCAPE_HEX | ESCAPE_NA,
293 },{
294 .out = "\007 \eb\"\x90\\xcf\r",
295 .flags = ESCAPE_SPACE | ESCAPE_HEX | ESCAPE_NA,
296 },{
297 .out = "\007 \eb\"\x90\\xcf\r",
298 .flags = ESCAPE_SPECIAL | ESCAPE_HEX | ESCAPE_NA,
299 },{
300 .out = "\007 \eb\"\x90\\xcf\r",
301 .flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_HEX | ESCAPE_NA,
302 },{
303 /* terminator */
304 }}
305 },{
306 .in = "\007 \eb\"\x90\xCF\r",
307 .s1 = {{
308 .out = "\007 \eb\"\x90\xCF\r",
309 .flags = ESCAPE_NAP,
310 },{
311 .out = "\007 \eb\"\x90\xCF\\r",
312 .flags = ESCAPE_SPACE | ESCAPE_NAP,
313 },{
314 .out = "\007 \eb\"\x90\xCF\r",
315 .flags = ESCAPE_SPECIAL | ESCAPE_NAP,
316 },{
317 .out = "\007 \eb\"\x90\xCF\\r",
318 .flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_NAP,
319 },{
320 .out = "\007 \eb\"\x90\\317\\015",
321 .flags = ESCAPE_OCTAL | ESCAPE_NAP,
322 },{
323 .out = "\007 \eb\"\x90\\317\\r",
324 .flags = ESCAPE_SPACE | ESCAPE_OCTAL | ESCAPE_NAP,
325 },{
326 .out = "\007 \eb\"\x90\\317\\015",
327 .flags = ESCAPE_SPECIAL | ESCAPE_OCTAL | ESCAPE_NAP,
328 },{
329 .out = "\007 \eb\"\x90\\317\r",
330 .flags = ESCAPE_ANY | ESCAPE_NAP,
331 },{
332 .out = "\007 \eb\"\x90\\xcf\\x0d",
333 .flags = ESCAPE_HEX | ESCAPE_NAP,
334 },{
335 .out = "\007 \eb\"\x90\\xcf\\r",
336 .flags = ESCAPE_SPACE | ESCAPE_HEX | ESCAPE_NAP,
337 },{
338 .out = "\007 \eb\"\x90\\xcf\\x0d",
339 .flags = ESCAPE_SPECIAL | ESCAPE_HEX | ESCAPE_NAP,
340 },{
341 .out = "\007 \eb\"\x90\\xcf\\r",
342 .flags = ESCAPE_SPACE | ESCAPE_SPECIAL | ESCAPE_HEX | ESCAPE_NAP,
343 },{
344 /* terminator */
345 }}
346 },{
347 /* terminator */
348 }};
349
350 static const struct test_string strings_upper[] = {
351 {
352 .in = "abcdefgh1234567890test",
353 .out = "ABCDEFGH1234567890TEST",
354 },
355 {
356 .in = "abCdeFgH1234567890TesT",
357 .out = "ABCDEFGH1234567890TEST",
358 },
359 };
360
361 static const struct test_string strings_lower[] = {
362 {
363 .in = "ABCDEFGH1234567890TEST",
364 .out = "abcdefgh1234567890test",
365 },
366 {
367 .in = "abCdeFgH1234567890TesT",
368 .out = "abcdefgh1234567890test",
369 },
370 };
371
test_string_find_match(const struct test_string_2 * s2,unsigned int flags)372 static const char *test_string_find_match(const struct test_string_2 *s2,
373 unsigned int flags)
374 {
375 const struct test_string_1 *s1 = s2->s1;
376 unsigned int i;
377
378 if (!flags)
379 return s2->in;
380
381 /* Test cases are NULL-aware */
382 flags &= ~ESCAPE_NULL;
383
384 /* ESCAPE_OCTAL has a higher priority */
385 if (flags & ESCAPE_OCTAL)
386 flags &= ~ESCAPE_HEX;
387
388 for (i = 0; i < TEST_STRING_2_MAX_S1 && s1->out; i++, s1++)
389 if (s1->flags == flags)
390 return s1->out;
391 return NULL;
392 }
393
394 static void
test_string_escape_overflow(struct kunit * test,const char * in,int p,unsigned int flags,const char * esc,int q_test,const char * name)395 test_string_escape_overflow(struct kunit *test,
396 const char *in, int p, unsigned int flags, const char *esc,
397 int q_test, const char *name)
398 {
399 int q_real;
400
401 q_real = string_escape_mem(in, p, NULL, 0, flags, esc);
402 KUNIT_EXPECT_EQ_MSG(test, q_real, q_test, "name:%s: flags:%#x", name, flags);
403 }
404
test_string_escape(struct kunit * test,const char * name,const struct test_string_2 * s2,unsigned int flags,const char * esc)405 static void test_string_escape(struct kunit *test, const char *name,
406 const struct test_string_2 *s2,
407 unsigned int flags, const char *esc)
408 {
409 size_t out_size = 512;
410 char *out_test = kunit_kzalloc(test, out_size, GFP_KERNEL);
411 char *out_real = kunit_kzalloc(test, out_size, GFP_KERNEL);
412 char *in = kunit_kzalloc(test, 256, GFP_KERNEL);
413 int p = 0, q_test = 0;
414 int q_real;
415
416 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, out_test);
417 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, out_real);
418 KUNIT_ASSERT_NOT_ERR_OR_NULL(test, in);
419
420 for (; s2->in; s2++) {
421 const char *out;
422 int len;
423
424 /* NULL injection */
425 if (flags & ESCAPE_NULL) {
426 in[p++] = '\0';
427 /* '\0' passes isascii() test */
428 if (flags & ESCAPE_NA && !(flags & ESCAPE_APPEND && esc)) {
429 out_test[q_test++] = '\0';
430 } else {
431 out_test[q_test++] = '\\';
432 out_test[q_test++] = '0';
433 }
434 }
435
436 /* Don't try strings that have no output */
437 out = test_string_find_match(s2, flags);
438 if (!out)
439 continue;
440
441 /* Copy string to in buffer */
442 len = strlen(s2->in);
443 memcpy(&in[p], s2->in, len);
444 p += len;
445
446 /* Copy expected result for given flags */
447 len = strlen(out);
448 memcpy(&out_test[q_test], out, len);
449 q_test += len;
450 }
451
452 q_real = string_escape_mem(in, p, out_real, out_size, flags, esc);
453
454 test_string_check_buf(test, name, flags, in, p, out_real, q_real, out_test,
455 q_test);
456
457 test_string_escape_overflow(test, in, p, flags, esc, q_test, name);
458 }
459
460 #define string_get_size_maxbuf 16
461 #define test_string_get_size_one(size, blk_size, exp_result10, exp_result2) \
462 do { \
463 BUILD_BUG_ON(sizeof(exp_result10) >= string_get_size_maxbuf); \
464 BUILD_BUG_ON(sizeof(exp_result2) >= string_get_size_maxbuf); \
465 __test_string_get_size(test, (size), (blk_size), (exp_result10), \
466 (exp_result2)); \
467 } while (0)
468
469
test_string_get_size_check(struct kunit * test,const char * units,const char * exp,char * res,const u64 size,const u64 blk_size)470 static void test_string_get_size_check(struct kunit *test,
471 const char *units,
472 const char *exp,
473 char *res,
474 const u64 size,
475 const u64 blk_size)
476 {
477 KUNIT_EXPECT_MEMEQ_MSG(test, res, exp, strlen(exp) + 1,
478 "string_get_size(size = %llu, blk_size = %llu, units = %s)",
479 size, blk_size, units);
480 }
481
__strchrcut(char * dst,const char * src,const char * cut)482 static void __strchrcut(char *dst, const char *src, const char *cut)
483 {
484 const char *from = src;
485 size_t len;
486
487 do {
488 len = strcspn(from, cut);
489 memcpy(dst, from, len);
490 dst += len;
491 from += len;
492 } while (*from++);
493 *dst = '\0';
494 }
495
__test_string_get_size_one(struct kunit * test,const u64 size,const u64 blk_size,const char * exp_result10,const char * exp_result2,enum string_size_units units,const char * cut)496 static void __test_string_get_size_one(struct kunit *test,
497 const u64 size, const u64 blk_size,
498 const char *exp_result10,
499 const char *exp_result2,
500 enum string_size_units units,
501 const char *cut)
502 {
503 char buf10[string_get_size_maxbuf];
504 char buf2[string_get_size_maxbuf];
505 char exp10[string_get_size_maxbuf];
506 char exp2[string_get_size_maxbuf];
507 char prefix10[64];
508 char prefix2[64];
509
510 sprintf(prefix10, "STRING_UNITS_10 [%s]", cut);
511 sprintf(prefix2, "STRING_UNITS_2 [%s]", cut);
512
513 __strchrcut(exp10, exp_result10, cut);
514 __strchrcut(exp2, exp_result2, cut);
515
516 string_get_size(size, blk_size, STRING_UNITS_10 | units, buf10, sizeof(buf10));
517 string_get_size(size, blk_size, STRING_UNITS_2 | units, buf2, sizeof(buf2));
518
519 test_string_get_size_check(test, prefix10, exp10, buf10, size, blk_size);
520 test_string_get_size_check(test, prefix2, exp2, buf2, size, blk_size);
521 }
522
__test_string_get_size(struct kunit * test,const u64 size,const u64 blk_size,const char * exp_result10,const char * exp_result2)523 static void __test_string_get_size(struct kunit *test,
524 const u64 size, const u64 blk_size,
525 const char *exp_result10,
526 const char *exp_result2)
527 {
528 struct {
529 enum string_size_units units;
530 const char *cut;
531 } get_size_test_cases[] = {
532 { 0, "" },
533 { STRING_UNITS_NO_SPACE, " " },
534 { STRING_UNITS_NO_SPACE | STRING_UNITS_NO_BYTES, " B" },
535 { STRING_UNITS_NO_BYTES, "B" },
536 };
537 int i;
538
539 for (i = 0; i < ARRAY_SIZE(get_size_test_cases); i++)
540 __test_string_get_size_one(test, size, blk_size,
541 exp_result10, exp_result2,
542 get_size_test_cases[i].units,
543 get_size_test_cases[i].cut);
544 }
545
test_get_size(struct kunit * test)546 static void test_get_size(struct kunit *test)
547 {
548 /* small values */
549 test_string_get_size_one(0, 512, "0 B", "0 B");
550 test_string_get_size_one(1, 512, "512 B", "512 B");
551 test_string_get_size_one(1100, 1, "1.10 kB", "1.07 KiB");
552
553 /* normal values */
554 test_string_get_size_one(16384, 512, "8.39 MB", "8.00 MiB");
555 test_string_get_size_one(500118192, 512, "256 GB", "238 GiB");
556 test_string_get_size_one(8192, 4096, "33.6 MB", "32.0 MiB");
557
558 /* weird block sizes */
559 test_string_get_size_one(3000, 1900, "5.70 MB", "5.44 MiB");
560
561 /* huge values */
562 test_string_get_size_one(U64_MAX, 4096, "75.6 ZB", "64.0 ZiB");
563 test_string_get_size_one(4096, U64_MAX, "75.6 ZB", "64.0 ZiB");
564 }
565
test_upper_lower(struct kunit * test)566 static void test_upper_lower(struct kunit *test)
567 {
568 char *dst;
569 int i;
570
571 for (i = 0; i < ARRAY_SIZE(strings_upper); i++) {
572 const char *s = strings_upper[i].in;
573 int len = strlen(strings_upper[i].in) + 1;
574
575 dst = kmalloc(len, GFP_KERNEL);
576 KUNIT_ASSERT_NOT_NULL(test, dst);
577
578 string_upper(dst, s);
579 KUNIT_EXPECT_STREQ(test, dst, strings_upper[i].out);
580 kfree(dst);
581 }
582
583 for (i = 0; i < ARRAY_SIZE(strings_lower); i++) {
584 const char *s = strings_lower[i].in;
585 int len = strlen(strings_lower[i].in) + 1;
586
587 dst = kmalloc(len, GFP_KERNEL);
588 KUNIT_ASSERT_NOT_NULL(test, dst);
589
590 string_lower(dst, s);
591 KUNIT_EXPECT_STREQ(test, dst, strings_lower[i].out);
592 kfree(dst);
593 }
594 }
595
test_unescape(struct kunit * test)596 static void test_unescape(struct kunit *test)
597 {
598 unsigned int i;
599
600 for (i = 0; i < UNESCAPE_ALL_MASK + 1; i++)
601 test_string_unescape(test, "unescape", i, false);
602 test_string_unescape(test, "unescape inplace",
603 get_random_u32_below(UNESCAPE_ALL_MASK + 1), true);
604
605 /* Without dictionary */
606 for (i = 0; i < ESCAPE_ALL_MASK + 1; i++)
607 test_string_escape(test, "escape 0", escape0, i, TEST_STRING_2_DICT_0);
608
609 /* With dictionary */
610 for (i = 0; i < ESCAPE_ALL_MASK + 1; i++)
611 test_string_escape(test, "escape 1", escape1, i, TEST_STRING_2_DICT_1);
612 }
613
614 static struct kunit_case string_helpers_test_cases[] = {
615 KUNIT_CASE(test_get_size),
616 KUNIT_CASE(test_upper_lower),
617 KUNIT_CASE(test_unescape),
618 {}
619 };
620
621 static struct kunit_suite string_helpers_test_suite = {
622 .name = "string_helpers",
623 .test_cases = string_helpers_test_cases,
624 };
625
626 kunit_test_suites(&string_helpers_test_suite);
627
628 MODULE_LICENSE("Dual BSD/GPL");
629