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isqrt: add tests

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This commit is contained in:
Federico Stra 2023-09-18 19:27:26 +02:00
parent 3e8676c327
commit 1b34f1c6b2
2 changed files with 21 additions and 0 deletions
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11
library/core/tests/num/int_macros.rs
View File

@ -290,6 +290,17 @@ macro_rules! int_module {
assert_eq!(r.saturating_pow(0), 1 as $T);
}
#[test]
fn test_isqrt() {
assert_eq!($T::MIN.checked_isqrt(), None);
assert_eq!((-1 as $T).checked_isqrt(), None);
assert_eq!((0 as $T).isqrt(), 0 as $T);
assert_eq!((1 as $T).isqrt(), 1 as $T);
assert_eq!((2 as $T).isqrt(), 1 as $T);
assert_eq!((99 as $T).isqrt(), 9 as $T);
assert_eq!((100 as $T).isqrt(), 10 as $T);
}
#[test]
fn test_div_floor() {
let a: $T = 8;

10
library/core/tests/num/uint_macros.rs
View File

@ -206,6 +206,16 @@ macro_rules! uint_module {
assert_eq!(r.saturating_pow(2), MAX);
}
#[test]
fn test_isqrt() {
assert_eq!((0 as $T).isqrt(), 0 as $T);
assert_eq!((1 as $T).isqrt(), 1 as $T);
assert_eq!((2 as $T).isqrt(), 1 as $T);
assert_eq!((99 as $T).isqrt(), 9 as $T);
assert_eq!((100 as $T).isqrt(), 10 as $T);
assert_eq!($T::MAX.isqrt(), (1 << ($T::BITS / 2)) - 1);
}
#[test]
fn test_div_floor() {
assert_eq!((8 as $T).div_floor(3), 2);