kunit: tool: update riscv QEMU config with new serial dependency
[linux-block.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 /*
165  * Note: tests below use kunit_alloc_and_get_resource(), so as a consequence
166  * they have a reference to the associated resource that they must release
167  * via kunit_put_resource().  In normal operation, users will only
168  * have to do this for cases where they use kunit_find_resource(), and the
169  * kunit_alloc_resource() function will be used (which does not take a
170  * resource reference).
171  */
172 static void kunit_resource_test_destroy_resource(struct kunit *test)
173 {
174         struct kunit_test_resource_context *ctx = test->priv;
175         struct kunit_resource *res = kunit_alloc_and_get_resource(
176                         &ctx->test,
177                         fake_resource_init,
178                         fake_resource_free,
179                         GFP_KERNEL,
180                         ctx);
181
182         kunit_put_resource(res);
183
184         KUNIT_ASSERT_FALSE(test,
185                            kunit_destroy_resource(&ctx->test,
186                                                   kunit_resource_instance_match,
187                                                   res->data));
188
189         KUNIT_EXPECT_FALSE(test, ctx->is_resource_initialized);
190         KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
191 }
192
193 static void kunit_resource_test_remove_resource(struct kunit *test)
194 {
195         struct kunit_test_resource_context *ctx = test->priv;
196         struct kunit_resource *res = kunit_alloc_and_get_resource(
197                         &ctx->test,
198                         fake_resource_init,
199                         fake_resource_free,
200                         GFP_KERNEL,
201                         ctx);
202
203         /* The resource is in the list */
204         KUNIT_EXPECT_FALSE(test, list_empty(&ctx->test.resources));
205
206         /* Remove the resource. The pointer is still valid, but it can't be
207          * found.
208          */
209         kunit_remove_resource(test, res);
210         KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
211         /* We haven't been freed yet. */
212         KUNIT_EXPECT_TRUE(test, ctx->is_resource_initialized);
213
214         /* Removing the resource multiple times is valid. */
215         kunit_remove_resource(test, res);
216         KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
217         /* Despite having been removed twice (from only one reference), the
218          * resource still has not been freed.
219          */
220         KUNIT_EXPECT_TRUE(test, ctx->is_resource_initialized);
221
222         /* Free the resource. */
223         kunit_put_resource(res);
224         KUNIT_EXPECT_FALSE(test, ctx->is_resource_initialized);
225 }
226
227 static void kunit_resource_test_cleanup_resources(struct kunit *test)
228 {
229         int i;
230         struct kunit_test_resource_context *ctx = test->priv;
231         struct kunit_resource *resources[5];
232
233         for (i = 0; i < ARRAY_SIZE(resources); i++) {
234                 resources[i] = kunit_alloc_and_get_resource(&ctx->test,
235                                                             fake_resource_init,
236                                                             fake_resource_free,
237                                                             GFP_KERNEL,
238                                                             ctx);
239                 kunit_put_resource(resources[i]);
240         }
241
242         kunit_cleanup(&ctx->test);
243
244         KUNIT_EXPECT_TRUE(test, list_empty(&ctx->test.resources));
245 }
246
247 static void kunit_resource_test_mark_order(int order_array[],
248                                            size_t order_size,
249                                            int key)
250 {
251         int i;
252
253         for (i = 0; i < order_size && order_array[i]; i++)
254                 ;
255
256         order_array[i] = key;
257 }
258
259 #define KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, order_field, key)                  \
260                 kunit_resource_test_mark_order(ctx->order_field,               \
261                                                ARRAY_SIZE(ctx->order_field),   \
262                                                key)
263
264 static int fake_resource_2_init(struct kunit_resource *res, void *context)
265 {
266         struct kunit_test_resource_context *ctx = context;
267
268         KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, allocate_order, 2);
269
270         res->data = ctx;
271
272         return 0;
273 }
274
275 static void fake_resource_2_free(struct kunit_resource *res)
276 {
277         struct kunit_test_resource_context *ctx = res->data;
278
279         KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, free_order, 2);
280 }
281
282 static int fake_resource_1_init(struct kunit_resource *res, void *context)
283 {
284         struct kunit_test_resource_context *ctx = context;
285         struct kunit_resource *res2;
286
287         res2 = kunit_alloc_and_get_resource(&ctx->test,
288                                             fake_resource_2_init,
289                                             fake_resource_2_free,
290                                             GFP_KERNEL,
291                                             ctx);
292
293         KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, allocate_order, 1);
294
295         res->data = ctx;
296
297         kunit_put_resource(res2);
298
299         return 0;
300 }
301
302 static void fake_resource_1_free(struct kunit_resource *res)
303 {
304         struct kunit_test_resource_context *ctx = res->data;
305
306         KUNIT_RESOURCE_TEST_MARK_ORDER(ctx, free_order, 1);
307 }
308
309 /*
310  * TODO(brendanhiggins@google.com): replace the arrays that keep track of the
311  * order of allocation and freeing with strict mocks using the IN_SEQUENCE macro
312  * to assert allocation and freeing order when the feature becomes available.
313  */
314 static void kunit_resource_test_proper_free_ordering(struct kunit *test)
315 {
316         struct kunit_test_resource_context *ctx = test->priv;
317         struct kunit_resource *res;
318
319         /* fake_resource_1 allocates a fake_resource_2 in its init. */
320         res = kunit_alloc_and_get_resource(&ctx->test,
321                                            fake_resource_1_init,
322                                            fake_resource_1_free,
323                                            GFP_KERNEL,
324                                            ctx);
325
326         /*
327          * Since fake_resource_2_init calls KUNIT_RESOURCE_TEST_MARK_ORDER
328          * before returning to fake_resource_1_init, it should be the first to
329          * put its key in the allocate_order array.
330          */
331         KUNIT_EXPECT_EQ(test, ctx->allocate_order[0], 2);
332         KUNIT_EXPECT_EQ(test, ctx->allocate_order[1], 1);
333
334         kunit_put_resource(res);
335
336         kunit_cleanup(&ctx->test);
337
338         /*
339          * Because fake_resource_2 finishes allocation before fake_resource_1,
340          * fake_resource_1 should be freed first since it could depend on
341          * fake_resource_2.
342          */
343         KUNIT_EXPECT_EQ(test, ctx->free_order[0], 1);
344         KUNIT_EXPECT_EQ(test, ctx->free_order[1], 2);
345 }
346
347 static void kunit_resource_test_static(struct kunit *test)
348 {
349         struct kunit_test_resource_context ctx;
350         struct kunit_resource res;
351
352         KUNIT_EXPECT_EQ(test, kunit_add_resource(test, NULL, NULL, &res, &ctx),
353                         0);
354
355         KUNIT_EXPECT_PTR_EQ(test, res.data, (void *)&ctx);
356
357         kunit_cleanup(test);
358
359         KUNIT_EXPECT_TRUE(test, list_empty(&test->resources));
360 }
361
362 static void kunit_resource_test_named(struct kunit *test)
363 {
364         struct kunit_resource res1, res2, *found = NULL;
365         struct kunit_test_resource_context ctx;
366
367         KUNIT_EXPECT_EQ(test,
368                         kunit_add_named_resource(test, NULL, NULL, &res1,
369                                                  "resource_1", &ctx),
370                         0);
371         KUNIT_EXPECT_PTR_EQ(test, res1.data, (void *)&ctx);
372
373         KUNIT_EXPECT_EQ(test,
374                         kunit_add_named_resource(test, NULL, NULL, &res1,
375                                                  "resource_1", &ctx),
376                         -EEXIST);
377
378         KUNIT_EXPECT_EQ(test,
379                         kunit_add_named_resource(test, NULL, NULL, &res2,
380                                                  "resource_2", &ctx),
381                         0);
382
383         found = kunit_find_named_resource(test, "resource_1");
384
385         KUNIT_EXPECT_PTR_EQ(test, found, &res1);
386
387         if (found)
388                 kunit_put_resource(&res1);
389
390         KUNIT_EXPECT_EQ(test, kunit_destroy_named_resource(test, "resource_2"),
391                         0);
392
393         kunit_cleanup(test);
394
395         KUNIT_EXPECT_TRUE(test, list_empty(&test->resources));
396 }
397
398 static int kunit_resource_test_init(struct kunit *test)
399 {
400         struct kunit_test_resource_context *ctx =
401                         kzalloc(sizeof(*ctx), GFP_KERNEL);
402
403         KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
404
405         test->priv = ctx;
406
407         kunit_init_test(&ctx->test, "test_test_context", NULL);
408
409         return 0;
410 }
411
412 static void kunit_resource_test_exit(struct kunit *test)
413 {
414         struct kunit_test_resource_context *ctx = test->priv;
415
416         kunit_cleanup(&ctx->test);
417         kfree(ctx);
418 }
419
420 static struct kunit_case kunit_resource_test_cases[] = {
421         KUNIT_CASE(kunit_resource_test_init_resources),
422         KUNIT_CASE(kunit_resource_test_alloc_resource),
423         KUNIT_CASE(kunit_resource_test_destroy_resource),
424         KUNIT_CASE(kunit_resource_test_remove_resource),
425         KUNIT_CASE(kunit_resource_test_cleanup_resources),
426         KUNIT_CASE(kunit_resource_test_proper_free_ordering),
427         KUNIT_CASE(kunit_resource_test_static),
428         KUNIT_CASE(kunit_resource_test_named),
429         {}
430 };
431
432 static struct kunit_suite kunit_resource_test_suite = {
433         .name = "kunit-resource-test",
434         .init = kunit_resource_test_init,
435         .exit = kunit_resource_test_exit,
436         .test_cases = kunit_resource_test_cases,
437 };
438
439 static void kunit_log_test(struct kunit *test);
440
441 static struct kunit_case kunit_log_test_cases[] = {
442         KUNIT_CASE(kunit_log_test),
443         {}
444 };
445
446 static struct kunit_suite kunit_log_test_suite = {
447         .name = "kunit-log-test",
448         .test_cases = kunit_log_test_cases,
449 };
450
451 static void kunit_log_test(struct kunit *test)
452 {
453         struct kunit_suite suite;
454
455         suite.log = kunit_kzalloc(test, KUNIT_LOG_SIZE, GFP_KERNEL);
456         KUNIT_ASSERT_NOT_ERR_OR_NULL(test, suite.log);
457
458         kunit_log(KERN_INFO, test, "put this in log.");
459         kunit_log(KERN_INFO, test, "this too.");
460         kunit_log(KERN_INFO, &suite, "add to suite log.");
461         kunit_log(KERN_INFO, &suite, "along with this.");
462
463 #ifdef CONFIG_KUNIT_DEBUGFS
464         KUNIT_EXPECT_NOT_ERR_OR_NULL(test,
465                                      strstr(test->log, "put this in log."));
466         KUNIT_EXPECT_NOT_ERR_OR_NULL(test,
467                                      strstr(test->log, "this too."));
468         KUNIT_EXPECT_NOT_ERR_OR_NULL(test,
469                                      strstr(suite.log, "add to suite log."));
470         KUNIT_EXPECT_NOT_ERR_OR_NULL(test,
471                                      strstr(suite.log, "along with this."));
472 #else
473         KUNIT_EXPECT_NULL(test, test->log);
474 #endif
475 }
476
477 static void kunit_status_set_failure_test(struct kunit *test)
478 {
479         struct kunit fake;
480
481         kunit_init_test(&fake, "fake test", NULL);
482
483         KUNIT_EXPECT_EQ(test, fake.status, (enum kunit_status)KUNIT_SUCCESS);
484         kunit_set_failure(&fake);
485         KUNIT_EXPECT_EQ(test, fake.status, (enum kunit_status)KUNIT_FAILURE);
486 }
487
488 static void kunit_status_mark_skipped_test(struct kunit *test)
489 {
490         struct kunit fake;
491
492         kunit_init_test(&fake, "fake test", NULL);
493
494         /* Before: Should be SUCCESS with no comment. */
495         KUNIT_EXPECT_EQ(test, fake.status, KUNIT_SUCCESS);
496         KUNIT_EXPECT_STREQ(test, fake.status_comment, "");
497
498         /* Mark the test as skipped. */
499         kunit_mark_skipped(&fake, "Accepts format string: %s", "YES");
500
501         /* After: Should be SKIPPED with our comment. */
502         KUNIT_EXPECT_EQ(test, fake.status, (enum kunit_status)KUNIT_SKIPPED);
503         KUNIT_EXPECT_STREQ(test, fake.status_comment, "Accepts format string: YES");
504 }
505
506 static struct kunit_case kunit_status_test_cases[] = {
507         KUNIT_CASE(kunit_status_set_failure_test),
508         KUNIT_CASE(kunit_status_mark_skipped_test),
509         {}
510 };
511
512 static struct kunit_suite kunit_status_test_suite = {
513         .name = "kunit_status",
514         .test_cases = kunit_status_test_cases,
515 };
516
517 kunit_test_suites(&kunit_try_catch_test_suite, &kunit_resource_test_suite,
518                   &kunit_log_test_suite, &kunit_status_test_suite);
519
520 MODULE_LICENSE("GPL v2");