Re: [PATCH v7] lib/math: Add int_sqrt test suite

On Thu, Dec 12, 2024 at 11:26:50PM -0500, Luis Felipe Hernandez wrote:

Adds test suite for integer based square root function.

The test suite is designed to verify the correctness of the int_sqrt() math library function.

Signed-off-by: Luis Felipe Hernandez luis.hernandez093@gmail.com

LGTM. Feel free to add:

Reviewed-by: Kuan-Wei Chiu visitorckw@gmail.com

Regards, Kuan-Wei

---

lib/Kconfig.debug | 15 ++++++++ lib/math/Makefile | 1 + lib/math/tests/Makefile | 1 + lib/math/tests/int_sqrt_kunit.c | 66 +++++++++++++++++++++++++++++++++ 4 files changed, 83 insertions(+) create mode 100644 lib/math/tests/int_sqrt_kunit.c

diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug index f3d723705879..147d9fef42e7 100644 --- a/lib/Kconfig.debug +++ b/lib/Kconfig.debug @@ -3161,6 +3161,21 @@ config INT_POW_TEST If unsure, say N +config INT_SQRT_KUNIT_TEST

• tristate "Integer square root test" if !KUNIT_ALL_TESTS
• depends on KUNIT
• default KUNIT_ALL_TESTS
• help

•  This option enables the KUnit test suite for the int_sqrt() function,
  

•  which performs square root calculation. The test suite checks
  

•  various scenarios, including edge cases, to ensure correctness.
  

•  Enabling this option will include tests that check various scenarios
  

•  and edge cases to ensure the accuracy and reliability of the square root
  

•  function.
  

•  If unsure, say N
  

endif # RUNTIME_TESTING_MENU config ARCH_USE_MEMTEST diff --git a/lib/math/Makefile b/lib/math/Makefile index 3ef11305f8d2..853f023ae537 100644 --- a/lib/math/Makefile +++ b/lib/math/Makefile @@ -9,3 +9,4 @@ obj-$(CONFIG_INT_POW_TEST) += tests/int_pow_kunit.o obj-$(CONFIG_TEST_DIV64) += test_div64.o obj-$(CONFIG_TEST_MULDIV64) += test_mul_u64_u64_div_u64.o obj-$(CONFIG_RATIONAL_KUNIT_TEST) += rational-test.o +obj-$(CONFIG_INT_SQRT_KUNIT_TEST) += tests/int_sqrt_kunit.o \ No newline at end of file diff --git a/lib/math/tests/Makefile b/lib/math/tests/Makefile index 6a169123320a..e1a79f093b2d 100644 --- a/lib/math/tests/Makefile +++ b/lib/math/tests/Makefile @@ -1,3 +1,4 @@ # SPDX-License-Identifier: GPL-2.0-only obj-$(CONFIG_INT_POW_TEST) += int_pow_kunit.o +obj-$(CONFIG_INT_SQRT_KUNIT_TEST) += int_sqrt_kunit.o diff --git a/lib/math/tests/int_sqrt_kunit.c b/lib/math/tests/int_sqrt_kunit.c new file mode 100644 index 000000000000..1798e1312eb7 --- /dev/null +++ b/lib/math/tests/int_sqrt_kunit.c @@ -0,0 +1,66 @@ +// SPDX-License-Identifier: GPL-2.0-only

+#include <kunit/test.h> +#include <linux/limits.h> +#include <linux/math.h> +#include <linux/module.h> +#include <linux/string.h>

+struct test_case_params {

• unsigned long x;
• unsigned long expected_result;
• const char *name;

+};

+static const struct test_case_params params[] = {

• { 0, 0, "edge case: square root of 0" },
• { 1, 1, "perfect square: square root of 1" },
• { 2, 1, "non-perfect square: square root of 2" },
• { 3, 1, "non-perfect square: square root of 3" },
• { 4, 2, "perfect square: square root of 4" },
• { 5, 2, "non-perfect square: square root of 5" },
• { 6, 2, "non-perfect square: square root of 6" },
• { 7, 2, "non-perfect square: square root of 7" },
• { 8, 2, "non-perfect square: square root of 8" },
• { 9, 3, "perfect square: square root of 9" },
• { 15, 3, "non-perfect square: square root of 15 (N-1 from 16)" },
• { 16, 4, "perfect square: square root of 16" },
• { 17, 4, "non-perfect square: square root of 17 (N+1 from 16)" },
• { 80, 8, "non-perfect square: square root of 80 (N-1 from 81)" },
• { 81, 9, "perfect square: square root of 81" },
• { 82, 9, "non-perfect square: square root of 82 (N+1 from 81)" },
• { 255, 15, "non-perfect square: square root of 255 (N-1 from 256)" },
• { 256, 16, "perfect square: square root of 256" },
• { 257, 16, "non-perfect square: square root of 257 (N+1 from 256)" },
• { 2147483648, 46340, "large input: square root of 2147483648" },
• { 4294967295, 65535, "edge case: ULONG_MAX for 32-bit" },

+};

+static void get_desc(const struct test_case_params *tc, char *desc) +{

• strscpy(desc, tc->name, KUNIT_PARAM_DESC_SIZE);

+}

+KUNIT_ARRAY_PARAM(int_sqrt, params, get_desc);

+static void int_sqrt_test(struct kunit *test) +{

• const struct test_case_params *tc = (const struct test_case_params *)test->param_value;
• KUNIT_EXPECT_EQ(test, tc->expected_result, int_sqrt(tc->x));

+}

+static struct kunit_case math_int_sqrt_test_cases[] = {

• KUNIT_CASE_PARAM(int_sqrt_test, int_sqrt_gen_params),
• {}

+};

+static struct kunit_suite int_sqrt_test_suite = {

• .name = "math-int_sqrt",
• .test_cases = math_int_sqrt_test_cases,

+};

+kunit_test_suites(&int_sqrt_test_suite);

+MODULE_DESCRIPTION("math.int_sqrt KUnit test suite");

+MODULE_LICENSE("GPL");

2.47.1