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0fafc9e156
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. Link: https://lkml.kernel.org/r/20241213042701.1037467-1-luis.hernandez093@gmail.com Signed-off-by: Luis Felipe Hernandez <luis.hernandez093@gmail.com> Reviewed-by: Kuan-Wei Chiu <visitorckw@gmail.com> Cc: David Gow <davidgow@google.com> Cc: Ricardo B. Marliere <rbm@suse.com> Cc: Shuah Khan <skhan@linuxfoundation.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
66 lines
2.2 KiB
C
66 lines
2.2 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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#include <kunit/test.h>
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#include <linux/limits.h>
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#include <linux/math.h>
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#include <linux/module.h>
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#include <linux/string.h>
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struct test_case_params {
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unsigned long x;
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unsigned long expected_result;
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const char *name;
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};
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static const struct test_case_params params[] = {
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{ 0, 0, "edge case: square root of 0" },
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{ 1, 1, "perfect square: square root of 1" },
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{ 2, 1, "non-perfect square: square root of 2" },
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{ 3, 1, "non-perfect square: square root of 3" },
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{ 4, 2, "perfect square: square root of 4" },
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{ 5, 2, "non-perfect square: square root of 5" },
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{ 6, 2, "non-perfect square: square root of 6" },
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{ 7, 2, "non-perfect square: square root of 7" },
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{ 8, 2, "non-perfect square: square root of 8" },
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{ 9, 3, "perfect square: square root of 9" },
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{ 15, 3, "non-perfect square: square root of 15 (N-1 from 16)" },
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{ 16, 4, "perfect square: square root of 16" },
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{ 17, 4, "non-perfect square: square root of 17 (N+1 from 16)" },
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{ 80, 8, "non-perfect square: square root of 80 (N-1 from 81)" },
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{ 81, 9, "perfect square: square root of 81" },
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{ 82, 9, "non-perfect square: square root of 82 (N+1 from 81)" },
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{ 255, 15, "non-perfect square: square root of 255 (N-1 from 256)" },
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{ 256, 16, "perfect square: square root of 256" },
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{ 257, 16, "non-perfect square: square root of 257 (N+1 from 256)" },
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{ 2147483648, 46340, "large input: square root of 2147483648" },
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{ 4294967295, 65535, "edge case: ULONG_MAX for 32-bit" },
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};
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static void get_desc(const struct test_case_params *tc, char *desc)
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{
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strscpy(desc, tc->name, KUNIT_PARAM_DESC_SIZE);
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}
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KUNIT_ARRAY_PARAM(int_sqrt, params, get_desc);
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static void int_sqrt_test(struct kunit *test)
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{
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const struct test_case_params *tc = (const struct test_case_params *)test->param_value;
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KUNIT_EXPECT_EQ(test, tc->expected_result, int_sqrt(tc->x));
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}
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static struct kunit_case math_int_sqrt_test_cases[] = {
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KUNIT_CASE_PARAM(int_sqrt_test, int_sqrt_gen_params),
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{}
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};
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static struct kunit_suite int_sqrt_test_suite = {
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.name = "math-int_sqrt",
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.test_cases = math_int_sqrt_test_cases,
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};
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kunit_test_suites(&int_sqrt_test_suite);
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MODULE_DESCRIPTION("math.int_sqrt KUnit test suite");
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MODULE_LICENSE("GPL");
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