path: root/lib/kunit/kunit-test.c

// SPDX-License-Identifier: GPL-2.0
/*
 * KUnit test for core test infrastructure.
 *
 * Copyright (C) 2019, Google LLC.
 * Author: Brendan Higgins <brendanhiggins@google.com>
 */
#include "linux/gfp_types.h"
#include <kunit/test.h>
#include <kunit/test-bug.h>
#include <kunit/static_stub.h>

#include <linux/device.h>
#include <kunit/device.h>

#include "string-stream.h"
#include "try-catch-impl.h"

struct kunit_try_catch_test_context {
	struct kunit_try_catch *try_catch;
	bool function_called;
};

static void kunit_test_successful_try(void *data)
{
	struct kunit *test = data;
	struct kunit_try_catch_test_context *ctx = test->priv;

	ctx->function_called = true;
}

static void kunit_test_no_catch(void *data)
{
	struct kunit *test = data;

	KUNIT_FAIL(test, "Catch should not be called\n");
}

static void kunit_test_try_catch_successful_try_no_catch(struct kunit *test)
{
	struct kunit_try_catch_test_context *ctx = test->priv;
	struct kunit_try_catch *try_catch = ctx->try_catch;

	kunit_try_catch_init(try_catch,
			     test,
			     kunit_test_successful_try,
			     kunit_test_no_catch,
			     300 * msecs_to_jiffies(MSEC_PER_SEC));
	kunit_try_catch_run(try_catch, test);

	KUNIT_EXPECT_TRUE(test, ctx->function_called);
}

static void kunit_test_unsuccessful_try(void *data)
{
	struct kunit *test = data;
	struct kunit_try_catch_test_context *ctx = test->priv;
	struct kunit_try_catch *try_catch = ctx->try_catch;

	kunit_try_catch_throw(try_catch);
	KUNIT_FAIL(test, "This line should never be reached\n");
}

static void kunit_test_catch(void *data)
{
	struct kunit *test = data;
	struct kunit_try_catch_test_context *ctx = test->priv;

	ctx->function_called = true;
}

static void kunit_test_try_catch_unsuccessful_try_does_catch(struct kunit *test)
{
	struct kunit_try_catch_test_context *ctx = test->priv;
	struct kunit_try_catch *try_catch = ctx->try_catch;

	kunit_try_catch_init(try_catch,
			     test,
			     kunit_test_unsuccessful_try,
			     kunit_test_catch,
			     300 * msecs_to_jiffies(MSEC_PER_SEC));
	kunit_try_catch_run(try_catch, test);

	KUNIT_EXPECT_TRUE(test, ctx->function_called);
}

static int kunit_try_catch_test_init(struct kunit *test)
{
	struct kunit_try_catch_test_context *ctx;

	ctx = kunit_kzalloc(test, sizeof(*ctx), GFP_KERNEL);
	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx);
	test->priv = ctx;

	ctx->try_catch = kunit_kmalloc(test,
				       sizeof(*ctx->try_catch),
				       GFP_KERNEL);
	KUNIT_ASSERT_NOT_ERR_OR_NULL(test, ctx->try_catch);

	return 0;
}

static struct kunit_case kunit_try_catch_test_cases[] = {
	KUNIT_CASE(kunit_test_try_catch_successful_try_no_catch),
	KUNIT_CASE(kunit_test_try_catch_unsuccessful_try_does_catch),
	{}
};

static struct kunit_suite kunit_try_catch_test_suite = {
	.name = "kunit-try-catch-test",
	.init = kunit_try_catch_test_init,
	.test_cases = kunit_try_catch_test_cases,
};

#if IS_ENABLED(CONFIG_KUNIT_FAULT_TEST)

static void kunit_test_null_dereference(void *data)
{
	struct kunit *test = data;
	int *null = NULL;

	*null = 0;

	KUNIT_FAIL(test, "This line should never be reached\n");
}

static void kunit_test_fault_null_dereference(struct kunit *test)
{
	struct kunit_try_catch_test_context *ctx = test->priv;
	struct kunit_try_catch *try_catch = ctx->try_catch;

	kunit_try_catch_init(try_catch,
			     test,
			     kunit_test_null_dereference,
			     kunit_test_catch,
			     300 * msecs_to_jiffies(MSEC_PER_SEC));
	kunit_try_catch_run(try_catch, test);

	KUNIT_EXPECT_EQ(test, try_catch->try_result, -EINTR);
	KUNIT_EXPECT_TRUE(test, ctx->function_called);
}

#endif /* CONFIG_KUNIT_FAULT_TEST */

static struct kunit_case kunit_fault_test_cases[] = {
#if IS_ENABLED(CONFIG_KUNIT_FAULT_TEST)
	KUNIT_CASE(kunit_test_fault_null_dereference),
#endif /* CONFIG_KUNIT_FAULT_TEST */
	{}
};

static struct kunit_suite kunit_fault_test_suite = {
	.name = "kunit_fault",
	.init = kunit_try_catch_test_init,
	.test_cases = kunit_fault_test_cases,
};

/*
 * Context for testing test managed resources
 * is_resource_initialized is used to test arbitrary resources
 */
struct kunit_test_resource_context {
	struct kunit test;
	bool is_resource_initialized;
	int allocate_order[2];
	int free_order[4];
};

static int fake_resource_init(struct kunit_resource *res, void *context)
{
	struct kunit_test_resource_context *ctx = context;

	res->data = &ctx->is_resource_initialized;
	ctx->is_resource_initialized = true;
	return 0;
}

static