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lib/math: Add int_pow test suite

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Adds test suite for integer based power function which performs integer
exponentiation.

The test suite is designed to verify that the implementation of int_pow
correctly computes the power of a given base raised to a given exponent.

The tests check various scenarios and edge cases to ensure the accuracy
and reliability of the exponentiation function.

Updated commit with test information at commit time: Shuah Khan

Signed-off-by: Luis Felipe Hernandez <luis.hernandez093@gmail.com>
Reviewed-by: David Gow <davidgow@google.com>
Signed-off-by: Shuah Khan <skhan@linuxfoundation.org>
This commit is contained in:
Luis Felipe Hernandez 2024-09-09 21:10:34 -04:00 committed by Shuah Khan
parent e4835f1da4
commit 7fcc9b5321
4 changed files with 72 additions and 0 deletions
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16
lib/Kconfig.debug
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@ -3051,3 +3051,19 @@ config RUST_KERNEL_DOCTESTS
endmenu # "Rust"
endmenu # Kernel hacking
config INT_POW_TEST
tristate "Integer exponentiation (int_pow) test" if !KUNIT_ALL_TESTS
depends on KUNIT
default KUNIT_ALL_TESTS
help
This option enables the KUnit test suite for the int_pow function,
which performs integer exponentiation. The test suite is designed to
verify that the implementation of int_pow correctly computes the power
of a given base raised to a given exponent.
Enabling this option will include tests that check various scenarios
and edge cases to ensure the accuracy and reliability of the exponentiation
function.
If unsure, say N

1
lib/math/Makefile
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@ -5,5 +5,6 @@ obj-$(CONFIG_CORDIC) += cordic.o
obj-$(CONFIG_PRIME_NUMBERS) += prime_numbers.o
obj-$(CONFIG_RATIONAL) += rational.o
obj-$(CONFIG_INT_POW_TEST) += tests/int_pow_kunit.o
obj-$(CONFIG_TEST_DIV64) += test_div64.o
obj-$(CONFIG_RATIONAL_KUNIT_TEST) += rational-test.o

3
lib/math/tests/Makefile Normal file
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@ -0,0 +1,3 @@
# SPDX-License-Identifier: GPL-2.0-only
obj-$(CONFIG_INT_POW_TEST) += int_pow_kunit.o

52
lib/math/tests/int_pow_kunit.c Normal file
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@ -0,0 +1,52 @@
// SPDX-License-Identifier: GPL-2.0-only
#include <kunit/test.h>
#include <linux/math.h>
struct test_case_params {
u64 base;
unsigned int exponent;
u64 expected_result;
const char *name;
};
static const struct test_case_params params[] = {
{ 64, 0, 1, "Power of zero" },
{ 64, 1, 64, "Power of one"},
{ 0, 5, 0, "Base zero" },
{ 1, 64, 1, "Base one" },
{ 2, 2, 4, "Two squared"},
{ 2, 3, 8, "Two cubed"},
{ 5, 5, 3125, "Five raised to the fifth power" },
{ U64_MAX, 1, U64_MAX, "Max base" },
{ 2, 63, 9223372036854775808ULL, "Large result"},
};
static void get_desc(const struct test_case_params *tc, char *desc)
{
strscpy(desc, tc->name, KUNIT_PARAM_DESC_SIZE);
}
KUNIT_ARRAY_PARAM(int_pow, params, get_desc);
static void int_pow_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_pow(tc->base, tc->exponent));
}
static struct kunit_case math_int_pow_test_cases[] = {
KUNIT_CASE_PARAM(int_pow_test, int_pow_gen_params),
{}
};
static struct kunit_suite int_pow_test_suite = {
.name = "math-int_pow",
.test_cases = math_int_pow_test_cases,
};
kunit_test_suites(&int_pow_test_suite);
MODULE_DESCRIPTION("math.int_pow KUnit test suite");
MODULE_LICENSE("GPL");