GNU Linux-libre 6.1.24-gnu
[releases.git] / lib / kunit / kunit-test.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * KUnit test for core test infrastructure.
4  *
5  * Copyright (C) 2019, Google LLC.
6  * Author: Brendan Higgins <brendanhiggins@google.com>
7  */
8 #include <kunit/test.h>
9
10 #include "try-catch-impl.h"
11
12 struct kunit_try_catch_test_context {
13         struct kunit_try_catch *try_catch;
14         bool function_called;
15 };
16
17 static void kunit_test_successful_try(void *data)
18 {
19         struct kunit *test = data;
20         struct kunit_try_catch_test_context *ctx = test->priv;
21
22         ctx->function_called = true;
23 }
24
25 static void kunit_test_no_catch(void *data)
26 {
27         struct kunit *test = data;
28
29         KUNIT_FAIL(test, "Catch should not be called\n");
30 }
31
32 static void kunit_test_try_catch_successful_try_no_catch(struct kunit *test)
33 {
34         struct kunit_try_catch_test_context *ctx = test->priv;
35         struct kunit_try_catch *try_catch = ctx->try_catch;
36
37         kunit_try_catch_init(try_catch,
38                              test,
39                              kunit_test_successful_try,
40                              kunit_test_no_catch);
41         kunit_try_catch_run(try_catch, test);
42
43         KUNIT_EXPECT_TRUE(test, ctx->function_called);
44 }
45
46 static void kunit_test_unsuccessful_try(void *data)
47 {
48         struct kunit *test = data;
49         struct kunit_try_catch_test_context *ctx = test->priv;
50         struct kunit_try_catch *try_catch = ctx->try_catch;
51
52         kunit_try_catch_throw(try_catch);
53         KUNIT_FAIL(test, "This line should never be reached\n");
54 }
55
56 static void kunit_test_catch(void *data)
57 {
58         struct kunit *test = data;
59         struct kunit_try_catch_test_context *ctx = test->priv;
60
61         ctx->function_called = true;
62 }
63
64 static void kunit_test_try_catch_unsuccessful_try_does_catch(struct kunit *test)
65 {
66         struct kunit_try_catch_test_context *ctx = test->priv;
67         struct kunit_try_catch *try_catch = ctx->try_catch;
68
69         kunit_try_catch_init(try_catch,
70                              test,
71                              kunit_test_unsuccessful_try,
72                              kunit_test_catch);
73         kunit_try_catch_run(try_catch, test);
74
75         KUNIT_EXPECT_TRUE(test, ctx->function_called);
76 }
77
78 static int kunit_try_catch_test_init(struct kunit *test)
79 {
80         struct kunit_try_catch_test_context *ctx;
81
82         ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL);
83         KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
84         test->priv = ctx;
85
86         ctx->try_catch = kunit_kmalloc(test,
87                                        sizeof(*ctx->try_catch),
88                                        GFP_KERNEL);
89         KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx->try_catch);
90
91         return 0;
92 }
93
94 static struct kunit_case kunit_try_catch_test_cases[] = {
95         KUNIT_CASE(kunit_test_try_catch_successful_try_no_catch),
96         KUNIT_CASE(kunit_test_try_catch_unsuccessful_try_does_catch),
97         {}
98 };
99
100 static struct kunit_suite kunit_try_catch_test_suite = {
101         .name = "kunit-try-catch-test",
102         .init = kunit_try_catch_test_init,
103         .test_cases = kunit_try_catch_test_cases,
104 };
105
106 /*
107  * Context for testing test managed resources
108  * is_resource_initialized is used to test arbitrary resources
109  */
110 struct kunit_test_resource_context {
111         struct kunit test;
112         bool is_resource_initialized;
113         int allocate_order[2];
114         int free_order[2];
115 };
116
117 static int fake_resource_init(struct kunit_resource *res, void *context)
118 {
119         struct kunit_test_resource_context *ctx = context;
120
121         res->data = &ctx->is_resource_initialized;
122         ctx->is_resource_initialized = true;
123         return 0;
124 }
125
126 static void fake_resource_free(struct kunit_resource *res)
127 {
128         bool *is_resource_initialized = res->data;
129
130         *is_resource_initialized = false;
131 }
132
133 static void kunit_resource_test_init_resources(struct kunit *test)
134 {
135         struct kunit_test_resource_context *ctx = test->priv;
136
137         kunit_init_test(&ctx->test, "testing_test_init_test", NULL);
138
139         KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
140 }
141
142 static void kunit_resource_test_alloc_resource(struct kunit *test)
143 {
144         struct kunit_test_resource_context *ctx = test->priv;
145         struct kunit_resource *res;
146         kunit_resource_free_t free = fake_resource_free;
147
148         res = kunit_alloc_and_get_resource(&ctx->test,
149                                            fake_resource_init,
150                                            fake_resource_free,
151                                            GFP_KERNEL,
152                                            ctx);
153
154         KUNIT_ASSERT_NOT_ERR_OR_NULL(test, res);
155         KUNIT_EXPECT_PTR_EQ(test,
156                             &ctx->is_resource_initialized,
157                             (bool *)res->data);
158         KUNIT_EXPECT_TRUE(test, list_is_last(&res->node, &ctx->test.resources));
159         KUNIT_EXPECT_PTR_EQ(test, free, res->free);
160
161         kunit_put_resource(res);
162 }
163
164 static inline bool kunit_resource_instance_match(struct kunit *test,
165                                                  struct kunit_resource *res,
166                                                  void *match_data)
167 {
168         return res->data == match_data;
169 }
170
171 /*
172  * Note: tests below use kunit_alloc_and_get_resource(), so as a consequence
173  * they have a reference to the associated resource that they must release
174  * via kunit_put_resource().  In normal operation, users will only
175  * have to do this for cases where they use kunit_find_resource(), and the
176  * kunit_alloc_resource() function will be used (which does not take a
177  * resource reference).
178  */
179 static void kunit_resource_test_destroy_resource(struct kunit *test)
180 {
181         struct kunit_test_resource_context *ctx = test->priv;
182         struct kunit_resource *res = kunit_alloc_and_get_resource(
183                         &ctx->test,
184                         fake_resource_init,
185                         fake_resource_free,
186                         GFP_KERNEL,
187                         ctx);
188
189         kunit_put_resource(res);
190
191         KUNIT_ASSERT_FALSE(test,
192                            kunit_destroy_resource(&ctx->test,
193                                                   kunit_resource_instance_match,
194                                                   res->data));
195
196         KUNIT_EXPECT_FALSE(test, ctx->is_resource_initialized);
197         KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
198 }
199
200 static void kunit_resource_test_remove_resource(struct kunit *test)
201 {
202         struct kunit_test_resource_context *ctx = test->priv;
203         struct kunit_resource *res = kunit_alloc_and_get_resource(
204                         &ctx->test,
205                         fake_resource_init,
206                         fake_resource_free,
207                         GFP_KERNEL,
208                         ctx);
209
210         /* The resource is in the list */
211         KUNIT_EXPECT_FALSE(test, list_empty(&ctx->test.resources));
212
213         /* Remove the resource. The pointer is still valid, but it can't be
214          * found.
215          */
216         kunit_remove_resource(test, res);
217         KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
218         /* We haven't been freed yet. */
219         KUNIT_EXPECT_TRUE(test, ctx->is_resource_initialized);
220
221         /* Removing the resource multiple times is valid. */
222         kunit_remove_resource(test, res);
223         KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
224         /* Despite having been removed twice (from only one reference), the
225          * resource still has not been freed.
226          */
227         KUNIT_EXPECT_TRUE(test, ctx->is_resource_initialized);
228
229         /* Free the resource. */
230         kunit_put_resource(res);
231         KUNIT_EXPECT_FALSE(test, ctx->is_resource_initialized);
232 }
233
234 static void kunit_resource_test_cleanup_resources(struct kunit *test)
235 {
236         int i;
237         struct kunit_test_resource_context *ctx = test->priv;
238         struct kunit_resource *resources[5];
239
240         for (i = 0; i < ARRAY_SIZE(resources); i++) {
241                 resources[i] = kunit_alloc_and_get_resource(&ctx->test,
242                                                             fake_resource_init,
243                                                             fake_resource_free,
244                                                             GFP_KERNEL,
245                                                             ctx);
246                 kunit_put_resource(resources[i]);
247         }
248
249         kunit_cleanup(&ctx->test);
250
251         KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
252 }
253
254 static void kunit_resource_test_mark_order(int order_array[],
255                                            size_t order_size,
256                                            int key)
257 {
258         int i;
259
260         for (i = 0; i < order_size && order_array[i]; i++)
261                 ;
262
263         order_array[i] = key;
264 }
265
266 #define KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, order_field, key)                  \
267                 kunit_resource_test_mark_order(ctx->order_field,               \
268                                                ARRAY_SIZE(ctx->order_field),   \
269                                                key)
270
271 static int fake_resource_2_init(struct kunit_resource *res, void *context)
272 {
273         struct kunit_test_resource_context *ctx = context;
274
275         KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, allocate_order, 2);
276
277         res->data = ctx;
278
279         return 0;
280 }
281
282 static void fake_resource_2_free(struct kunit_resource *res)
283 {
284         struct kunit_test_resource_context *ctx = res->data;
285
286         KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, free_order, 2);
287 }
288
289 static int fake_resource_1_init(struct kunit_resource *res, void *context)
290 {
291         struct kunit_test_resource_context *ctx = context;
292         struct kunit_resource *res2;
293
294         res2 = kunit_alloc_and_get_resource(&ctx->test,
295                                             fake_resource_2_init,
296                                             fake_resource_2_free,
297                                             GFP_KERNEL,
298                                             ctx);
299
300         KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, allocate_order, 1);
301
302         res->data = ctx;
303
304         kunit_put_resource(res2);
305
306         return 0;
307 }
308
309 static void fake_resource_1_free(struct kunit_resource *res)
310 {
311         struct kunit_test_resource_context *ctx = res->data;
312
313         KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, free_order, 1);
314 }
315
316 /*
317  * TODO(brendanhiggins@google.com): replace the arrays that keep track of the
318  * order of allocation and freeing with strict mocks using the IN_SEQUENCE macro
319  * to assert allocation and freeing order when the feature becomes available.
320  */
321 static void kunit_resource_test_proper_free_ordering(struct kunit *test)
322 {
323         struct kunit_test_resource_context *ctx = test->priv;
324         struct kunit_resource *res;
325
326         /* fake_resource_1 allocates a fake_resource_2 in its init. */
327         res = kunit_alloc_and_get_resource(&ctx->test,
328                                            fake_resource_1_init,
329                                            fake_resource_1_free,
330                                            GFP_KERNEL,
331                                            ctx);
332
333         /*
334          * Since fake_resource_2_init calls KUNIT_RESOURCE_TEST_MARK_ORDER
335          * before returning to fake_resource_1_init, it should be the first to
336          * put its key in the allocate_order array.
337          */
338         KUNIT_EXPECT_EQ(test, ctx->allocate_order[0], 2);
339         KUNIT_EXPECT_EQ(test, ctx->allocate_order[1], 1);
340
341         kunit_put_resource(res);
342
343         kunit_cleanup(&ctx->test);
344
345         /*
346          * Because fake_resource_2 finishes allocation before fake_resource_1,
347          * fake_resource_1 should be freed first since it could depend on
348          * fake_resource_2.
349          */
350         KUNIT_EXPECT_EQ(test, ctx->free_order[0], 1);
351         KUNIT_EXPECT_EQ(test, ctx->free_order[1], 2);
352 }
353
354 static void kunit_resource_test_static(struct kunit *test)
355 {
356         struct kunit_test_resource_context ctx;
357         struct kunit_resource res;
358
359         KUNIT_EXPECT_EQ(test, kunit_add_resource(test, NULL, NULL, &res, &ctx),
360                         0);
361
362         KUNIT_EXPECT_PTR_EQ(test, res.data, (void *)&ctx);
363
364         kunit_cleanup(test);
365
366         KUNIT_EXPECT_TRUE(test, list_empty(&test->resources));
367 }
368
369 static void kunit_resource_test_named(struct kunit *test)
370 {
371         struct kunit_resource res1, res2, *found = NULL;
372         struct kunit_test_resource_context ctx;
373
374         KUNIT_EXPECT_EQ(test,
375                         kunit_add_named_resource(test, NULL, NULL, &res1,
376                                                  "resource_1", &ctx),
377                         0);
378         KUNIT_EXPECT_PTR_EQ(test, res1.data, (void *)&ctx);
379
380         KUNIT_EXPECT_EQ(test,
381                         kunit_add_named_resource(test, NULL, NULL, &res1,
382                                                  "resource_1", &ctx),
383                         -EEXIST);
384
385         KUNIT_EXPECT_EQ(test,
386                         kunit_add_named_resource(test, NULL, NULL, &res2,
387                                                  "resource_2", &ctx),
388                         0);
389
390         found = kunit_find_named_resource(test, "resource_1");
391
392         KUNIT_EXPECT_PTR_EQ(test, found, &res1);
393
394         if (found)
395                 kunit_put_resource(&res1);
396
397         KUNIT_EXPECT_EQ(test, kunit_destroy_named_resource(test, "resource_2"),
398                         0);
399
400         kunit_cleanup(test);
401
402         KUNIT_EXPECT_TRUE(test, list_empty(&test->resources));
403 }
404
405 static int kunit_resource_test_init(struct kunit *test)
406 {
407         struct kunit_test_resource_context *ctx =
408                         kzalloc(sizeof(*ctx), GFP_KERNEL);
409
410         KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
411
412         test->priv = ctx;
413
414         kunit_init_test(&ctx->test, "test_test_context", NULL);
415
416         return 0;
417 }
418
419 static void kunit_resource_test_exit(struct kunit *test)
420 {
421         struct kunit_test_resource_context *ctx = test->priv;
422
423         kunit_cleanup(&ctx->test);
424         kfree(ctx);
425 }
426
427 static struct kunit_case kunit_resource_test_cases[] = {
428         KUNIT_CASE(kunit_resource_test_init_resources),
429         KUNIT_CASE(kunit_resource_test_alloc_resource),
430         KUNIT_CASE(kunit_resource_test_destroy_resource),
431         KUNIT_CASE(kunit_resource_test_remove_resource),
432         KUNIT_CASE(kunit_resource_test_cleanup_resources),
433         KUNIT_CASE(kunit_resource_test_proper_free_ordering),
434         KUNIT_CASE(kunit_resource_test_static),
435         KUNIT_CASE(kunit_resource_test_named),
436         {}
437 };
438
439 static struct kunit_suite kunit_resource_test_suite = {
440         .name = "kunit-resource-test",
441         .init = kunit_resource_test_init,
442         .exit = kunit_resource_test_exit,
443         .test_cases = kunit_resource_test_cases,
444 };
445
446 static void kunit_log_test(struct kunit *test);
447
448 static struct kunit_case kunit_log_test_cases[] = {
449         KUNIT_CASE(kunit_log_test),
450         {}
451 };
452
453 static struct kunit_suite kunit_log_test_suite = {
454         .name = "kunit-log-test",
455         .test_cases = kunit_log_test_cases,
456 };
457
458 static void kunit_log_test(struct kunit *test)
459 {
460         struct kunit_suite suite;
461
462         suite.log = kunit_kzalloc(test, KUNIT_LOG_SIZE, GFP_KERNEL);
463         KUNIT_ASSERT_NOT_ERR_OR_NULL(test, suite.log);
464
465         kunit_log(KERN_INFO, test, "put this in log.");
466         kunit_log(KERN_INFO, test, "this too.");
467         kunit_log(KERN_INFO, &suite, "add to suite log.");
468         kunit_log(KERN_INFO, &suite, "along with this.");
469
470 #ifdef CONFIG_KUNIT_DEBUGFS
471         KUNIT_EXPECT_NOT_ERR_OR_NULL(test,
472                                      strstr(test->log, "put this in log."));
473         KUNIT_EXPECT_NOT_ERR_OR_NULL(test,
474                                      strstr(test->log, "this too."));
475         KUNIT_EXPECT_NOT_ERR_OR_NULL(test,
476                                      strstr(suite.log, "add to suite log."));
477         KUNIT_EXPECT_NOT_ERR_OR_NULL(test,
478                                      strstr(suite.log, "along with this."));
479 #else
480         KUNIT_EXPECT_NULL(test, test->log);
481 #endif
482 }
483
484 static void kunit_status_set_failure_test(struct kunit *test)
485 {
486         struct kunit fake;
487
488         kunit_init_test(&fake, "fake test", NULL);
489
490         KUNIT_EXPECT_EQ(test, fake.status, (enum kunit_status)KUNIT_SUCCESS);
491         kunit_set_failure(&fake);
492         KUNIT_EXPECT_EQ(test, fake.status, (enum kunit_status)KUNIT_FAILURE);
493 }
494
495 static void kunit_status_mark_skipped_test(struct kunit *test)
496 {
497         struct kunit fake;
498
499         kunit_init_test(&fake, "fake test", NULL);
500
501         /* Before: Should be SUCCESS with no comment. */
502         KUNIT_EXPECT_EQ(test, fake.status, KUNIT_SUCCESS);
503         KUNIT_EXPECT_STREQ(test, fake.status_comment, "");
504
505         /* Mark the test as skipped. */
506         kunit_mark_skipped(&fake, "Accepts format string: %s", "YES");
507
508         /* After: Should be SKIPPED with our comment. */
509         KUNIT_EXPECT_EQ(test, fake.status, (enum kunit_status)KUNIT_SKIPPED);
510         KUNIT_EXPECT_STREQ(test, fake.status_comment, "Accepts format string: YES");
511 }
512
513 static struct kunit_case kunit_status_test_cases[] = {
514         KUNIT_CASE(kunit_status_set_failure_test),
515         KUNIT_CASE(kunit_status_mark_skipped_test),
516         {}
517 };
518
519 static struct kunit_suite kunit_status_test_suite = {
520         .name = "kunit_status",
521         .test_cases = kunit_status_test_cases,
522 };
523
524 kunit_test_suites(&kunit_try_catch_test_suite, &kunit_resource_test_suite,
525                   &kunit_log_test_suite, &kunit_status_test_suite);
526
527 MODULE_LICENSE("GPL v2");