101 lines
3.2 KiB
Rust
101 lines
3.2 KiB
Rust
extern crate num_integer;
|
|
extern crate num_traits;
|
|
|
|
macro_rules! test_average {
|
|
($I:ident, $U:ident) => {
|
|
mod $I {
|
|
mod ceil {
|
|
use num_integer::Average;
|
|
|
|
#[test]
|
|
fn same_sign() {
|
|
assert_eq!((14 as $I).average_ceil(&16), 15 as $I);
|
|
assert_eq!((14 as $I).average_ceil(&17), 16 as $I);
|
|
|
|
let max = $crate::std::$I::MAX;
|
|
assert_eq!((max - 3).average_ceil(&(max - 1)), max - 2);
|
|
assert_eq!((max - 3).average_ceil(&(max - 2)), max - 2);
|
|
}
|
|
|
|
#[test]
|
|
fn different_sign() {
|
|
assert_eq!((14 as $I).average_ceil(&-4), 5 as $I);
|
|
assert_eq!((14 as $I).average_ceil(&-5), 5 as $I);
|
|
|
|
let min = $crate::std::$I::MIN;
|
|
let max = $crate::std::$I::MAX;
|
|
assert_eq!(min.average_ceil(&max), 0 as $I);
|
|
}
|
|
}
|
|
|
|
mod floor {
|
|
use num_integer::Average;
|
|
|
|
#[test]
|
|
fn same_sign() {
|
|
assert_eq!((14 as $I).average_floor(&16), 15 as $I);
|
|
assert_eq!((14 as $I).average_floor(&17), 15 as $I);
|
|
|
|
let max = $crate::std::$I::MAX;
|
|
assert_eq!((max - 3).average_floor(&(max - 1)), max - 2);
|
|
assert_eq!((max - 3).average_floor(&(max - 2)), max - 3);
|
|
}
|
|
|
|
#[test]
|
|
fn different_sign() {
|
|
assert_eq!((14 as $I).average_floor(&-4), 5 as $I);
|
|
assert_eq!((14 as $I).average_floor(&-5), 4 as $I);
|
|
|
|
let min = $crate::std::$I::MIN;
|
|
let max = $crate::std::$I::MAX;
|
|
assert_eq!(min.average_floor(&max), -1 as $I);
|
|
}
|
|
}
|
|
}
|
|
|
|
mod $U {
|
|
mod ceil {
|
|
use num_integer::Average;
|
|
|
|
#[test]
|
|
fn bounded() {
|
|
assert_eq!((14 as $U).average_ceil(&16), 15 as $U);
|
|
assert_eq!((14 as $U).average_ceil(&17), 16 as $U);
|
|
}
|
|
|
|
#[test]
|
|
fn overflow() {
|
|
let max = $crate::std::$U::MAX;
|
|
assert_eq!((max - 3).average_ceil(&(max - 1)), max - 2);
|
|
assert_eq!((max - 3).average_ceil(&(max - 2)), max - 2);
|
|
}
|
|
}
|
|
|
|
mod floor {
|
|
use num_integer::Average;
|
|
|
|
#[test]
|
|
fn bounded() {
|
|
assert_eq!((14 as $U).average_floor(&16), 15 as $U);
|
|
assert_eq!((14 as $U).average_floor(&17), 15 as $U);
|
|
}
|
|
|
|
#[test]
|
|
fn overflow() {
|
|
let max = $crate::std::$U::MAX;
|
|
assert_eq!((max - 3).average_floor(&(max - 1)), max - 2);
|
|
assert_eq!((max - 3).average_floor(&(max - 2)), max - 3);
|
|
}
|
|
}
|
|
}
|
|
};
|
|
}
|
|
|
|
test_average!(i8, u8);
|
|
test_average!(i16, u16);
|
|
test_average!(i32, u32);
|
|
test_average!(i64, u64);
|
|
#[cfg(has_i128)]
|
|
test_average!(i128, u128);
|
|
test_average!(isize, usize);
|