Remove custom functions for testing and use KUnit framework. Keep the tested functions and test data the same.

Current test threat (g/u)uid_parse and (g/u)uid_equal as different test cases. Make both functions being part of the same test case, given the dependency regarding their results. This reduces the tests cases from 6 cases to 4, while keeping the test coverage the same. Given that we have 3 strings for each test case, current test output notifies 18 tests results, and the KUnit output announces 12 results.

Signed-off-by: André Almeida andrealmeid@collabora.com Reviewed-by: Daniel Latypov dlatypov@google.com Reviewed-by: Brendan Higgins brendanhiggins@google.com Reviewed-by: Christoph Hellwig hch@lst.de --- lib/Kconfig.debug | 8 ++- lib/Makefile | 2 +- lib/test_uuid.c | 137 +++++++++++++++++++--------------------------- 3 files changed, 64 insertions(+), 83 deletions(-)

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index 2a9b6dcdac4f..b60f35d38dd2 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -2188,8 +2188,12 @@ config TEST_BITMAP

If unsure, say N.

-config TEST_UUID - tristate "Test functions located in the uuid module at runtime" +config UUID_KUNIT_TEST + tristate "Unit test for UUID" if !KUNIT_ALL_TESTS + depends on KUNIT + default KUNIT_ALL_TESTS + help + Tests parsing functions for UUID/GUID strings.

config TEST_XARRAY tristate "Test the XArray code at runtime" diff --git a/lib/Makefile b/lib/Makefile index a841be5244ac..dca72c4f26f5 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -86,7 +86,6 @@ obj-$(CONFIG_TEST_PRINTF) += test_printf.o obj-$(CONFIG_TEST_SCANF) += test_scanf.o obj-$(CONFIG_TEST_BITMAP) += test_bitmap.o obj-$(CONFIG_TEST_STRSCPY) += test_strscpy.o -obj-$(CONFIG_TEST_UUID) += test_uuid.o obj-$(CONFIG_TEST_XARRAY) += test_xarray.o obj-$(CONFIG_TEST_PARMAN) += test_parman.o obj-$(CONFIG_TEST_KMOD) += test_kmod.o @@ -358,5 +357,6 @@ obj-$(CONFIG_LINEAR_RANGES_TEST) += test_linear_ranges.o obj-$(CONFIG_BITS_TEST) += test_bits.o obj-$(CONFIG_CMDLINE_KUNIT_TEST) += cmdline_kunit.o obj-$(CONFIG_SLUB_KUNIT_TEST) += slub_kunit.o +obj-$(CONFIG_UUID_KUNIT_TEST) += test_uuid.o

obj-$(CONFIG_GENERIC_LIB_DEVMEM_IS_ALLOWED) += devmem_is_allowed.o diff --git a/lib/test_uuid.c b/lib/test_uuid.c index cd819c397dc7..30f350301e6d 100644 --- a/lib/test_uuid.c +++ b/lib/test_uuid.c @@ -1,21 +1,20 @@ +// SPDX-License-Identifier: (GPL-2.0-or-later OR BSD-2-Clause) /* - * Test cases for lib/uuid.c module. + * Unit tests for lib/uuid.c module. + * + * Copyright 2016 Andy Shevchenko andriy.shevchenko@linux.intel.com + * Copyright 2021 André Almeida andrealmeid@riseup.net */ -#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt - -#include <linux/init.h> -#include <linux/kernel.h> -#include <linux/module.h> -#include <linux/string.h> +#include <kunit/test.h> #include <linux/uuid.h>

-struct test_uuid_data { +struct test_data { const char *uuid; guid_t le; uuid_t be; };

-static const struct test_uuid_data test_uuid_test_data[] = { +static const struct test_data correct_data[] = { { .uuid = "c33f4995-3701-450e-9fbf-206a2e98e576", .le = GUID_INIT(0xc33f4995, 0x3701, 0x450e, 0x9f, 0xbf, 0x20, 0x6a, 0x2e, 0x98, 0xe5, 0x76), @@ -33,101 +32,79 @@ static const struct test_uuid_data test_uuid_test_data[] = { }, };

-static const char * const test_uuid_wrong_data[] = { +static const char * const wrong_data[] = { "c33f4995-3701-450e-9fbf206a2e98e576 ", /* no hyphen(s) */ "64b4371c-77c1-48f9-8221-29f054XX023b", /* invalid character(s) */ "0cb4ddff-a545-4401-9d06-688af53e", /* not enough data */ };

-static unsigned total_tests __initdata; -static unsigned failed_tests __initdata; - -static void __init test_uuid_failed(const char *prefix, bool wrong, bool be, - const char *data, const char *actual) +static void uuid_correct_le(struct kunit *test) { - pr_err("%s test #%u %s %s data: '%s'\n", - prefix, - total_tests, - wrong ? "passed on wrong" : "failed on", - be ? "BE" : "LE", - data); - if (actual && *actual) - pr_err("%s test #%u actual data: '%s'\n", - prefix, - total_tests, - actual); - failed_tests++; + guid_t le; + const struct test_data *data = test->param_value; + + KUNIT_ASSERT_EQ_MSG(test, guid_parse(data->uuid, &le), 0, + "failed to parse '%s'", data->uuid); + KUNIT_EXPECT_TRUE_MSG(test, guid_equal(&data->le, &le), + "'%s' should be equal to %pUl", data->uuid, &le); }

-static void __init test_uuid_test(const struct test_uuid_data *data) +static void uuid_correct_be(struct kunit *test) { - guid_t le; uuid_t be; - char buf[48]; - - /* LE */ - total_tests++; - if (guid_parse(data->uuid, &le)) - test_uuid_failed("conversion", false, false, data->uuid, NULL); - - total_tests++; - if (!guid_equal(&data->le, &le)) { - sprintf(buf, "%pUl", &le); - test_uuid_failed("cmp", false, false, data->uuid, buf); - } - - /* BE */ - total_tests++; - if (uuid_parse(data->uuid, &be)) - test_uuid_failed("conversion", false, true, data->uuid, NULL); - - total_tests++; - if (!uuid_equal(&data->be, &be)) { - sprintf(buf, "%pUb", &be); - test_uuid_failed("cmp", false, true, data->uuid, buf); - } + const struct test_data *data = test->param_value; + + KUNIT_ASSERT_EQ_MSG(test, uuid_parse(data->uuid, &be), 0, + "failed to parse '%s'", data->uuid); + KUNIT_EXPECT_TRUE_MSG(test, uuid_equal(&data->be, &be), + "'%s' should be equal to %pUl", data->uuid, &be); }

-static void __init test_uuid_wrong(const char *data) +static void uuid_wrong_le(struct kunit *test) { guid_t le; - uuid_t be; - - /* LE */ - total_tests++; - if (!guid_parse(data, &le)) - test_uuid_failed("negative", true, false, data, NULL); + const char * const *data = test->param_value;

- /* BE */ - total_tests++; - if (!uuid_parse(data, &be)) - test_uuid_failed("negative", true, true, data, NULL); + KUNIT_ASSERT_NE_MSG(test, guid_parse(*data, &le), 0, + "parsing of '%s' should've failed", *data); }

-static int __init test_uuid_init(void) +static void uuid_wrong_be(struct kunit *test) { - unsigned int i; - - for (i = 0; i < ARRAY_SIZE(test_uuid_test_data); i++) - test_uuid_test(&test_uuid_test_data[i]); - - for (i = 0; i < ARRAY_SIZE(test_uuid_wrong_data); i++) - test_uuid_wrong(test_uuid_wrong_data[i]); + uuid_t be; + const char * const *data = test->param_value;

- if (failed_tests == 0) - pr_info("all %u tests passed\n", total_tests); - else - pr_err("failed %u out of %u tests\n", failed_tests, total_tests); + KUNIT_ASSERT_NE_MSG(test, uuid_parse(*data, &be), 0, + "parsing of '%s' should've failed", *data); +}

- return failed_tests ? -EINVAL : 0; +static void case_to_desc_correct(const struct test_data *t, char *desc) +{ + strcpy(desc, t->uuid); } -module_init(test_uuid_init);

-static void __exit test_uuid_exit(void) +KUNIT_ARRAY_PARAM(correct, correct_data, case_to_desc_correct); + +static void case_to_desc_wrong(const char * const *s, char *desc) { - /* do nothing */ + strcpy(desc, *s); } -module_exit(test_uuid_exit); + +KUNIT_ARRAY_PARAM(wrong, wrong_data, case_to_desc_wrong); + +static struct kunit_case uuid_test_cases[] = { + KUNIT_CASE_PARAM(uuid_correct_be, correct_gen_params), + KUNIT_CASE_PARAM(uuid_correct_le, correct_gen_params), + KUNIT_CASE_PARAM(uuid_wrong_be, wrong_gen_params), + KUNIT_CASE_PARAM(uuid_wrong_le, wrong_gen_params), + {} +}; + +static struct kunit_suite uuid_test_suite = { + .name = "uuid", + .test_cases = uuid_test_cases, +}; +kunit_test_suite(uuid_test_suite);

MODULE_AUTHOR("Andy Shevchenko andriy.shevchenko@linux.intel.com"); MODULE_LICENSE("Dual BSD/GPL");