lib/kunit/executor_test.c - linux/kernel/git/will/linux - Git at Google

 // SPDX-License-Identifier: GPL-2.0
 /*
  * KUnit test for the KUnit executor.
  *
  * Copyright (C) 2021, Google LLC.
  * Author: Daniel Latypov <dlatypov@google.com>
  */

 #include <kunit/test.h>
 #include <kunit/attributes.h>

 static void free_suite_set_at_end(struct kunit *test, const void *to_free);
 static struct kunit_suite *alloc_fake_suite(struct kunit *test,
 					    const char *suite_name,
 					    struct kunit_case *test_cases);

 static void dummy_test(struct kunit *test) {}

 static struct kunit_case dummy_test_cases[] = {
 	/* .run_case is not important, just needs to be non-NULL */
 	{ .name = "test1", .run_case = dummy_test },
 	{ .name = "test2", .run_case = dummy_test },
 	{},
 };

 static void parse_filter_test(struct kunit *test)
 {
 	struct kunit_glob_filter filter = {NULL, NULL};

 	kunit_parse_glob_filter(&filter, "suite");
 	KUNIT_EXPECT_STREQ(test, filter.suite_glob, "suite");
 	KUNIT_EXPECT_FALSE(test, filter.test_glob);
 	kfree(filter.suite_glob);
 	kfree(filter.test_glob);

 	kunit_parse_glob_filter(&filter, "suite.test");
 	KUNIT_EXPECT_STREQ(test, filter.suite_glob, "suite");
 	KUNIT_EXPECT_STREQ(test, filter.test_glob, "test");
 	kfree(filter.suite_glob);
 	kfree(filter.test_glob);
 }

 static void filter_suites_test(struct kunit *test)
 {
 	struct kunit_suite *subsuite[3] = {NULL, NULL};
 	struct kunit_suite_set suite_set = {
 		.start = subsuite, .end = &subsuite[2],
 	};
 	struct kunit_suite_set got;
 	int err = 0;

 	subsuite[0] = alloc_fake_suite(test, "suite1", dummy_test_cases);
 	subsuite[1] = alloc_fake_suite(test, "suite2", dummy_test_cases);

 	/* Want: suite1, suite2, NULL -> suite2, NULL */
 	got = kunit_filter_suites(&suite_set, "suite2", NULL, NULL, &err);
 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, got.start);
 	KUNIT_ASSERT_EQ(test, err, 0);
 	free_suite_set_at_end(test, &got);

 	/* Validate we just have suite2 */
 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, got.start[0]);
 	KUNIT_EXPECT_STREQ(test, (const char *)got.start[0]->name, "suite2");

 	/* Contains one element (end is 1 past end) */
 	KUNIT_ASSERT_EQ(test, got.end - got.start, 1);
 }

 static void filter_suites_test_glob_test(struct kunit *test)
 {
 	struct kunit_suite *subsuite[3] = {NULL, NULL};
 	struct kunit_suite_set suite_set = {
 		.start = subsuite, .end = &subsuite[2],
 	};
 	struct kunit_suite_set got;
 	int err = 0;

 	subsuite[0] = alloc_fake_suite(test, "suite1", dummy_test_cases);
 	subsuite[1] = alloc_fake_suite(test, "suite2", dummy_test_cases);

 	/* Want: suite1, suite2, NULL -> suite2 (just test1), NULL */
 	got = kunit_filter_suites(&suite_set, "suite2.test2", NULL, NULL, &err);
 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, got.start);
 	KUNIT_ASSERT_EQ(test, err, 0);
 	free_suite_set_at_end(test, &got);

 	/* Validate we just have suite2 */
 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, got.start[0]);
 	KUNIT_EXPECT_STREQ(test, (const char *)got.start[0]->name, "suite2");
 	KUNIT_ASSERT_EQ(test, got.end - got.start, 1);

 	/* Now validate we just have test2 */
 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, got.start[0]->test_cases);
 	KUNIT_EXPECT_STREQ(test, (const char *)got.start[0]->test_cases[0].name, "test2");
 	KUNIT_EXPECT_FALSE(test, got.start[0]->test_cases[1].name);
 }

 static void filter_suites_to_empty_test(struct kunit *test)
 {
 	struct kunit_suite *subsuite[3] = {NULL, NULL};
 	struct kunit_suite_set suite_set = {
 		.start = subsuite, .end = &subsuite[2],
 	};
 	struct kunit_suite_set got;
 	int err = 0;

 	subsuite[0] = alloc_fake_suite(test, "suite1", dummy_test_cases);
 	subsuite[1] = alloc_fake_suite(test, "suite2", dummy_test_cases);

 	got = kunit_filter_suites(&suite_set, "not_found", NULL, NULL, &err);
 	KUNIT_ASSERT_EQ(test, err, 0);
 	free_suite_set_at_end(test, &got); /* just in case */

 	KUNIT_EXPECT_PTR_EQ_MSG(test, got.start, got.end,
 				"should be empty to indicate no match");
 }

 static void parse_filter_attr_test(struct kunit *test)
 {
 	int j, filter_count;
 	struct kunit_attr_filter *parsed_filters;
 	char filters[] = "speed>slow, module!=example", *filter = filters;
 	int err = 0;

 	filter_count = kunit_get_filter_count(filters);
 	KUNIT_EXPECT_EQ(test, filter_count, 2);

 	parsed_filters = kunit_kcalloc(test, filter_count, sizeof(*parsed_filters),
 			GFP_KERNEL);
 	for (j = 0; j < filter_count; j++) {
 		parsed_filters[j] = kunit_next_attr_filter(&filter, &err);
 		KUNIT_ASSERT_EQ_MSG(test, err, 0, "failed to parse filter from '%s'", filters);
 	}

 	KUNIT_EXPECT_STREQ(test, kunit_attr_filter_name(parsed_filters[0]), "speed");
 	KUNIT_EXPECT_STREQ(test, parsed_filters[0].input, ">slow");

 	KUNIT_EXPECT_STREQ(test, kunit_attr_filter_name(parsed_filters[1]), "module");
 	KUNIT_EXPECT_STREQ(test, parsed_filters[1].input, "!=example");
 }

 static struct kunit_case dummy_attr_test_cases[] = {
 	/* .run_case is not important, just needs to be non-NULL */
 	{ .name = "slow", .run_case = dummy_test, .module_name = "dummy",
 	  .attr.speed = KUNIT_SPEED_SLOW },
 	{ .name = "normal", .run_case = dummy_test, .module_name = "dummy" },
 	{},
 };

 static void filter_attr_test(struct kunit *test)
 {
 	struct kunit_suite *subsuite[3] = {NULL, NULL};
 	struct kunit_suite_set suite_set = {
 		.start = subsuite, .end = &subsuite[2],
 	};
 	struct kunit_suite_set got;
 	char filter[] = "speed>slow";
 	int err = 0;

 	subsuite[0] = alloc_fake_suite(test, "normal_suite", dummy_attr_test_cases);
 	subsuite[1] = alloc_fake_suite(test, "slow_suite", dummy_attr_test_cases);
 	subsuite[1]->attr.speed = KUNIT_SPEED_SLOW; // Set suite attribute

 	/*
 	 * Want: normal_suite(slow, normal), slow_suite(slow, normal),
 	 *		NULL -> normal_suite(normal), NULL
 	 *
 	 * The normal test in slow_suite is filtered out because the speed
 	 * attribute is unset and thus, the filtering is based on the parent attribute
 	 * of slow.
 	 */
 	got = kunit_filter_suites(&suite_set, NULL, filter, NULL, &err);
 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, got.start);
 	KUNIT_ASSERT_EQ(test, err, 0);
 	free_suite_set_at_end(test, &got);

 	/* Validate we just have normal_suite */
 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, got.start[0]);
 	KUNIT_EXPECT_STREQ(test, got.start[0]->name, "normal_suite");
 	KUNIT_ASSERT_EQ(test, got.end - got.start, 1);

 	/* Now validate we just have normal test case */
 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, got.start[0]->test_cases);
 	KUNIT_EXPECT_STREQ(test, got.start[0]->test_cases[0].name, "normal");
 	KUNIT_EXPECT_FALSE(test, got.start[0]->test_cases[1].name);
 }

 static void filter_attr_empty_test(struct kunit *test)
 {
 	struct kunit_suite *subsuite[3] = {NULL, NULL};
 	struct kunit_suite_set suite_set = {
 		.start = subsuite, .end = &subsuite[2],
 	};
 	struct kunit_suite_set got;
 	char filter[] = "module!=dummy";
 	int err = 0;

 	subsuite[0] = alloc_fake_suite(test, "suite1", dummy_attr_test_cases);
 	subsuite[1] = alloc_fake_suite(test, "suite2", dummy_attr_test_cases);

 	got = kunit_filter_suites(&suite_set, NULL, filter, NULL, &err);
 	KUNIT_ASSERT_EQ(test, err, 0);
 	free_suite_set_at_end(test, &got); /* just in case */

 	KUNIT_EXPECT_PTR_EQ_MSG(test, got.start, got.end,
 				"should be empty to indicate no match");
 }

 static void filter_attr_skip_test(struct kunit *test)
 {
 	struct kunit_suite *subsuite[2] = {NULL};
 	struct kunit_suite_set suite_set = {
 		.start = subsuite, .end = &subsuite[1],
 	};
 	struct kunit_suite_set got;
 	char filter[] = "speed>slow";
 	int err = 0;

 	subsuite[0] = alloc_fake_suite(test, "suite", dummy_attr_test_cases);

 	/* Want: suite(slow, normal), NULL -> suite(slow with SKIP, normal), NULL */
 	got = kunit_filter_suites(&suite_set, NULL, filter, "skip", &err);
 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, got.start);
 	KUNIT_ASSERT_EQ(test, err, 0);
 	free_suite_set_at_end(test, &got);

 	/* Validate we have both the slow and normal test */
 	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, got.start[0]->test_cases);
 	KUNIT_ASSERT_EQ(test, kunit_suite_num_test_cases(got.start[0]), 2);
 	KUNIT_EXPECT_STREQ(test, got.start[0]->test_cases[0].name, "slow");
 	KUNIT_EXPECT_STREQ(test, got.start[0]->test_cases[1].name, "normal");

 	/* Now ensure slow is skipped and normal is not */
 	KUNIT_EXPECT_EQ(test, got.start[0]->test_cases[0].status, KUNIT_SKIPPED);
 	KUNIT_EXPECT_FALSE(test, got.start[0]->test_cases[1].status);
 }

 static struct kunit_case executor_test_cases[] = {
 	KUNIT_CASE(parse_filter_test),
 	KUNIT_CASE(filter_suites_test),
 	KUNIT_CASE(filter_suites_test_glob_test),
 	KUNIT_CASE(filter_suites_to_empty_test),
 	KUNIT_CASE(parse_filter_attr_test),
 	KUNIT_CASE(filter_attr_test),
 	KUNIT_CASE(filter_attr_empty_test),
 	KUNIT_CASE(filter_attr_skip_test),
 	{}
 };

 static struct kunit_suite executor_test_suite = {
 	.name = "kunit_executor_test",
 	.test_cases = executor_test_cases,
 };

 kunit_test_suites(&executor_test_suite);

 /* Test helpers */

 static void free_suite_set(void *suite_set)
 {
 	kunit_free_suite_set(*(struct kunit_suite_set *)suite_set);
 	kfree(suite_set);
 }

 /* Use the resource API to register a call to free_suite_set.
  * Since we never actually use the resource, it's safe to use on const data.
  */
 static void free_suite_set_at_end(struct kunit *test, const void *to_free)
 {
 	struct kunit_suite_set *free;

 	if (!((struct kunit_suite_set *)to_free)->start)
 		return;

 	free = kzalloc(sizeof(struct kunit_suite_set), GFP_KERNEL);
 	*free = *(struct kunit_suite_set *)to_free;

 	kunit_add_action(test, free_suite_set, (void *)free);
 }

 static struct kunit_suite *alloc_fake_suite(struct kunit *test,
 					    const char *suite_name,
 					    struct kunit_case *test_cases)
 {
 	struct kunit_suite *suite;

 	/* We normally never expect to allocate suites, hence the non-const cast. */
 	suite = kunit_kzalloc(test, sizeof(*suite), GFP_KERNEL);
 	strncpy((char *)suite->name, suite_name, sizeof(suite->name) - 1);
 	suite->test_cases = test_cases;

 	return suite;
 }
	// SPDX-License-Identifier: GPL-2.0
	/*
	* KUnit test for the KUnit executor.
	*
	* Copyright (C) 2021, Google LLC.
	* Author: Daniel Latypov <dlatypov@google.com>
	*/

	#include <kunit/test.h>
	#include <kunit/attributes.h>

	static void free_suite_set_at_end(struct kunit test, const void to_free);
	static struct kunit_suite alloc_fake_suite(struct kunit test,
	const char *suite_name,
	struct kunit_case *test_cases);

	static void dummy_test(struct kunit *test) {}

	static struct kunit_case dummy_test_cases[] = {
	/* .run_case is not important, just needs to be non-NULL */
	{ .name = "test1", .run_case = dummy_test },
	{ .name = "test2", .run_case = dummy_test },
	{},
	};

	static void parse_filter_test(struct kunit *test)
	{
	struct kunit_glob_filter filter = {NULL, NULL};

	kunit_parse_glob_filter(&filter, "suite");
	KUNIT_EXPECT_STREQ(test, filter.suite_glob, "suite");
	KUNIT_EXPECT_FALSE(test, filter.test_glob);
	kfree(filter.suite_glob);
	kfree(filter.test_glob);

	kunit_parse_glob_filter(&filter, "suite.test");
	KUNIT_EXPECT_STREQ(test, filter.suite_glob, "suite");
	KUNIT_EXPECT_STREQ(test, filter.test_glob, "test");
	kfree(filter.suite_glob);
	kfree(filter.test_glob);
	}

	static void filter_suites_test(struct kunit *test)
	{
	struct kunit_suite *subsuite[3] = {NULL, NULL};
	struct kunit_suite_set suite_set = {
	.start = subsuite, .end = &subsuite[2],
	};
	struct kunit_suite_set got;
	int err = 0;

	subsuite[0] = alloc_fake_suite(test, "suite1", dummy_test_cases);
	subsuite[1] = alloc_fake_suite(test, "suite2", dummy_test_cases);

	/* Want: suite1, suite2, NULL -> suite2, NULL */
	got = kunit_filter_suites(&suite_set, "suite2", NULL, NULL, &err);
	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, got.start);
	KUNIT_ASSERT_EQ(test, err, 0);
	free_suite_set_at_end(test, &got);

	/* Validate we just have suite2 */
	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, got.start[0]);
	KUNIT_EXPECT_STREQ(test, (const char *)got.start[0]->name, "suite2");

	/* Contains one element (end is 1 past end) */
	KUNIT_ASSERT_EQ(test, got.end - got.start, 1);
	}

	static void filter_suites_test_glob_test(struct kunit *test)
	{
	struct kunit_suite *subsuite[3] = {NULL, NULL};
	struct kunit_suite_set suite_set = {
	.start = subsuite, .end = &subsuite[2],
	};
	struct kunit_suite_set got;
	int err = 0;

	subsuite[0] = alloc_fake_suite(test, "suite1", dummy_test_cases);
	subsuite[1] = alloc_fake_suite(test, "suite2", dummy_test_cases);

	/* Want: suite1, suite2, NULL -> suite2 (just test1), NULL */
	got = kunit_filter_suites(&suite_set, "suite2.test2", NULL, NULL, &err);
	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, got.start);
	KUNIT_ASSERT_EQ(test, err, 0);
	free_suite_set_at_end(test, &got);

	/* Validate we just have suite2 */
	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, got.start[0]);
	KUNIT_EXPECT_STREQ(test, (const char *)got.start[0]->name, "suite2");
	KUNIT_ASSERT_EQ(test, got.end - got.start, 1);

	/* Now validate we just have test2 */
	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, got.start[0]->test_cases);
	KUNIT_EXPECT_STREQ(test, (const char *)got.start[0]->test_cases[0].name, "test2");
	KUNIT_EXPECT_FALSE(test, got.start[0]->test_cases[1].name);
	}

	static void filter_suites_to_empty_test(struct kunit *test)
	{
	struct kunit_suite *subsuite[3] = {NULL, NULL};
	struct kunit_suite_set suite_set = {
	.start = subsuite, .end = &subsuite[2],
	};
	struct kunit_suite_set got;
	int err = 0;

	subsuite[0] = alloc_fake_suite(test, "suite1", dummy_test_cases);
	subsuite[1] = alloc_fake_suite(test, "suite2", dummy_test_cases);

	got = kunit_filter_suites(&suite_set, "not_found", NULL, NULL, &err);
	KUNIT_ASSERT_EQ(test, err, 0);
	free_suite_set_at_end(test, &got); /* just in case */

	KUNIT_EXPECT_PTR_EQ_MSG(test, got.start, got.end,
	"should be empty to indicate no match");
	}

	static void parse_filter_attr_test(struct kunit *test)
	{
	int j, filter_count;
	struct kunit_attr_filter *parsed_filters;
	char filters[] = "speed>slow, module!=example", *filter = filters;
	int err = 0;

	filter_count = kunit_get_filter_count(filters);
	KUNIT_EXPECT_EQ(test, filter_count, 2);

	parsed_filters = kunit_kcalloc(test, filter_count, sizeof(*parsed_filters),
	GFP_KERNEL);
	for (j = 0; j < filter_count; j++) {
	parsed_filters[j] = kunit_next_attr_filter(&filter, &err);
	KUNIT_ASSERT_EQ_MSG(test, err, 0, "failed to parse filter from '%s'", filters);
	}

	KUNIT_EXPECT_STREQ(test, kunit_attr_filter_name(parsed_filters[0]), "speed");
	KUNIT_EXPECT_STREQ(test, parsed_filters[0].input, ">slow");

	KUNIT_EXPECT_STREQ(test, kunit_attr_filter_name(parsed_filters[1]), "module");
	KUNIT_EXPECT_STREQ(test, parsed_filters[1].input, "!=example");
	}

	static struct kunit_case dummy_attr_test_cases[] = {
	/* .run_case is not important, just needs to be non-NULL */
	{ .name = "slow", .run_case = dummy_test, .module_name = "dummy",
	.attr.speed = KUNIT_SPEED_SLOW },
	{ .name = "normal", .run_case = dummy_test, .module_name = "dummy" },
	{},
	};

	static void filter_attr_test(struct kunit *test)
	{
	struct kunit_suite *subsuite[3] = {NULL, NULL};
	struct kunit_suite_set suite_set = {
	.start = subsuite, .end = &subsuite[2],
	};
	struct kunit_suite_set got;
	char filter[] = "speed>slow";
	int err = 0;

	subsuite[0] = alloc_fake_suite(test, "normal_suite", dummy_attr_test_cases);
	subsuite[1] = alloc_fake_suite(test, "slow_suite", dummy_attr_test_cases);
	subsuite[1]->attr.speed = KUNIT_SPEED_SLOW; // Set suite attribute

	/*
	* Want: normal_suite(slow, normal), slow_suite(slow, normal),
	* NULL -> normal_suite(normal), NULL
	*
	* The normal test in slow_suite is filtered out because the speed
	* attribute is unset and thus, the filtering is based on the parent attribute
	* of slow.
	*/
	got = kunit_filter_suites(&suite_set, NULL, filter, NULL, &err);
	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, got.start);
	KUNIT_ASSERT_EQ(test, err, 0);
	free_suite_set_at_end(test, &got);

	/* Validate we just have normal_suite */
	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, got.start[0]);
	KUNIT_EXPECT_STREQ(test, got.start[0]->name, "normal_suite");
	KUNIT_ASSERT_EQ(test, got.end - got.start, 1);

	/* Now validate we just have normal test case */
	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, got.start[0]->test_cases);
	KUNIT_EXPECT_STREQ(test, got.start[0]->test_cases[0].name, "normal");
	KUNIT_EXPECT_FALSE(test, got.start[0]->test_cases[1].name);
	}

	static void filter_attr_empty_test(struct kunit *test)
	{
	struct kunit_suite *subsuite[3] = {NULL, NULL};
	struct kunit_suite_set suite_set = {
	.start = subsuite, .end = &subsuite[2],
	};
	struct kunit_suite_set got;
	char filter[] = "module!=dummy";
	int err = 0;

	subsuite[0] = alloc_fake_suite(test, "suite1", dummy_attr_test_cases);
	subsuite[1] = alloc_fake_suite(test, "suite2", dummy_attr_test_cases);

	got = kunit_filter_suites(&suite_set, NULL, filter, NULL, &err);
	KUNIT_ASSERT_EQ(test, err, 0);
	free_suite_set_at_end(test, &got); /* just in case */

	KUNIT_EXPECT_PTR_EQ_MSG(test, got.start, got.end,
	"should be empty to indicate no match");
	}

	static void filter_attr_skip_test(struct kunit *test)
	{
	struct kunit_suite *subsuite[2] = {NULL};
	struct kunit_suite_set suite_set = {
	.start = subsuite, .end = &subsuite[1],
	};
	struct kunit_suite_set got;
	char filter[] = "speed>slow";
	int err = 0;

	subsuite[0] = alloc_fake_suite(test, "suite", dummy_attr_test_cases);

	/* Want: suite(slow, normal), NULL -> suite(slow with SKIP, normal), NULL */
	got = kunit_filter_suites(&suite_set, NULL, filter, "skip", &err);
	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, got.start);
	KUNIT_ASSERT_EQ(test, err, 0);
	free_suite_set_at_end(test, &got);

	/* Validate we have both the slow and normal test */
	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, got.start[0]->test_cases);
	KUNIT_ASSERT_EQ(test, kunit_suite_num_test_cases(got.start[0]), 2);
	KUNIT_EXPECT_STREQ(test, got.start[0]->test_cases[0].name, "slow");
	KUNIT_EXPECT_STREQ(test, got.start[0]->test_cases[1].name, "normal");

	/* Now ensure slow is skipped and normal is not */
	KUNIT_EXPECT_EQ(test, got.start[0]->test_cases[0].status, KUNIT_SKIPPED);
	KUNIT_EXPECT_FALSE(test, got.start[0]->test_cases[1].status);
	}

	static struct kunit_case executor_test_cases[] = {
	KUNIT_CASE(parse_filter_test),
	KUNIT_CASE(filter_suites_test),
	KUNIT_CASE(filter_suites_test_glob_test),
	KUNIT_CASE(filter_suites_to_empty_test),
	KUNIT_CASE(parse_filter_attr_test),
	KUNIT_CASE(filter_attr_test),
	KUNIT_CASE(filter_attr_empty_test),
	KUNIT_CASE(filter_attr_skip_test),
	{}
	};

	static struct kunit_suite executor_test_suite = {
	.name = "kunit_executor_test",
	.test_cases = executor_test_cases,
	};

	kunit_test_suites(&executor_test_suite);

	/* Test helpers */

	static void free_suite_set(void *suite_set)
	{
	kunit_free_suite_set((struct kunit_suite_set )suite_set);
	kfree(suite_set);
	}

	/* Use the resource API to register a call to free_suite_set.
	* Since we never actually use the resource, it's safe to use on const data.
	*/
	static void free_suite_set_at_end(struct kunit test, const void to_free)
	{
	struct kunit_suite_set *free;

	if (!((struct kunit_suite_set *)to_free)->start)
	return;

	free = kzalloc(sizeof(struct kunit_suite_set), GFP_KERNEL);
	free = (struct kunit_suite_set *)to_free;

	kunit_add_action(test, free_suite_set, (void *)free);
	}

	static struct kunit_suite alloc_fake_suite(struct kunit test,
	const char *suite_name,
	struct kunit_case *test_cases)
	{
	struct kunit_suite *suite;

	/* We normally never expect to allocate suites, hence the non-const cast. */
	suite = kunit_kzalloc(test, sizeof(*suite), GFP_KERNEL);
	strncpy((char *)suite->name, suite_name, sizeof(suite->name) - 1);
	suite->test_cases = test_cases;

	return suite;
	}