Merge tag 'mips_5.14_1' of git://git.kernel.org/pub/scm/linux/kernel/git/mips/linux
[linux-2.6-microblaze.git] / lib / kunit / executor_test.c
1 // SPDX-License-Identifier: GPL-2.0
2 /*
3  * KUnit test for the KUnit executor.
4  *
5  * Copyright (C) 2021, Google LLC.
6  * Author: Daniel Latypov <dlatypov@google.com>
7  */
8
9 #include <kunit/test.h>
10
11 static void kfree_at_end(struct kunit *test, const void *to_free);
12 static struct kunit_suite *alloc_fake_suite(struct kunit *test,
13                                             const char *suite_name);
14
15 static void filter_subsuite_test(struct kunit *test)
16 {
17         struct kunit_suite *subsuite[3] = {NULL, NULL, NULL};
18         struct kunit_suite * const *filtered;
19
20         subsuite[0] = alloc_fake_suite(test, "suite1");
21         subsuite[1] = alloc_fake_suite(test, "suite2");
22
23         /* Want: suite1, suite2, NULL -> suite2, NULL */
24         filtered = kunit_filter_subsuite(subsuite, "suite2*");
25         KUNIT_ASSERT_NOT_ERR_OR_NULL(test, filtered);
26         kfree_at_end(test, filtered);
27
28         KUNIT_ASSERT_NOT_ERR_OR_NULL(test, filtered[0]);
29         KUNIT_EXPECT_STREQ(test, (const char *)filtered[0]->name, "suite2");
30
31         KUNIT_EXPECT_FALSE(test, filtered[1]);
32 }
33
34 static void filter_subsuite_to_empty_test(struct kunit *test)
35 {
36         struct kunit_suite *subsuite[3] = {NULL, NULL, NULL};
37         struct kunit_suite * const *filtered;
38
39         subsuite[0] = alloc_fake_suite(test, "suite1");
40         subsuite[1] = alloc_fake_suite(test, "suite2");
41
42         filtered = kunit_filter_subsuite(subsuite, "not_found");
43         kfree_at_end(test, filtered); /* just in case */
44
45         KUNIT_EXPECT_FALSE_MSG(test, filtered,
46                                "should be NULL to indicate no match");
47 }
48
49 static void kfree_subsuites_at_end(struct kunit *test, struct suite_set *suite_set)
50 {
51         struct kunit_suite * const * const *suites;
52
53         kfree_at_end(test, suite_set->start);
54         for (suites = suite_set->start; suites < suite_set->end; suites++)
55                 kfree_at_end(test, *suites);
56 }
57
58 static void filter_suites_test(struct kunit *test)
59 {
60         /* Suites per-file are stored as a NULL terminated array */
61         struct kunit_suite *subsuites[2][2] = {
62                 {NULL, NULL},
63                 {NULL, NULL},
64         };
65         /* Match the memory layout of suite_set */
66         struct kunit_suite * const * const suites[2] = {
67                 subsuites[0], subsuites[1],
68         };
69
70         const struct suite_set suite_set = {
71                 .start = suites,
72                 .end = suites + 2,
73         };
74         struct suite_set filtered = {.start = NULL, .end = NULL};
75
76         /* Emulate two files, each having one suite */
77         subsuites[0][0] = alloc_fake_suite(test, "suite0");
78         subsuites[1][0] = alloc_fake_suite(test, "suite1");
79
80         /* Filter out suite1 */
81         filtered = kunit_filter_suites(&suite_set, "suite0");
82         kfree_subsuites_at_end(test, &filtered); /* let us use ASSERTs without leaking */
83         KUNIT_ASSERT_EQ(test, filtered.end - filtered.start, (ptrdiff_t)1);
84
85         KUNIT_ASSERT_NOT_ERR_OR_NULL(test, filtered.start);
86         KUNIT_ASSERT_NOT_ERR_OR_NULL(test, filtered.start[0]);
87         KUNIT_EXPECT_STREQ(test, (const char *)filtered.start[0][0]->name, "suite0");
88 }
89
90 static struct kunit_case executor_test_cases[] = {
91         KUNIT_CASE(filter_subsuite_test),
92         KUNIT_CASE(filter_subsuite_to_empty_test),
93         KUNIT_CASE(filter_suites_test),
94         {}
95 };
96
97 static struct kunit_suite executor_test_suite = {
98         .name = "kunit_executor_test",
99         .test_cases = executor_test_cases,
100 };
101
102 kunit_test_suites(&executor_test_suite);
103
104 /* Test helpers */
105
106 static void kfree_res_free(struct kunit_resource *res)
107 {
108         kfree(res->data);
109 }
110
111 /* Use the resource API to register a call to kfree(to_free).
112  * Since we never actually use the resource, it's safe to use on const data.
113  */
114 static void kfree_at_end(struct kunit *test, const void *to_free)
115 {
116         /* kfree() handles NULL already, but avoid allocating a no-op cleanup. */
117         if (IS_ERR_OR_NULL(to_free))
118                 return;
119         kunit_alloc_and_get_resource(test, NULL, kfree_res_free, GFP_KERNEL,
120                                      (void *)to_free);
121 }
122
123 static struct kunit_suite *alloc_fake_suite(struct kunit *test,
124                                             const char *suite_name)
125 {
126         struct kunit_suite *suite;
127
128         /* We normally never expect to allocate suites, hence the non-const cast. */
129         suite = kunit_kzalloc(test, sizeof(*suite), GFP_KERNEL);
130         strncpy((char *)suite->name, suite_name, sizeof(suite->name) - 1);
131
132         return suite;
133 }