macro_rules! uint_module { ($T:ident) => { #[cfg(test)] mod tests { use core::ops::{BitAnd, BitOr, BitXor, Not, Shl, Shr}; use core::$T::*; use std::str::FromStr; use crate::num; #[test] fn test_overflows() { assert!(MAX > 0); assert!(MIN <= 0); assert!((MIN + MAX).wrapping_add(1) == 0); } #[test] fn test_num() { num::test_num(10 as $T, 2 as $T); } #[test] fn test_bitwise_operators() { assert!(0b1110 as $T == (0b1100 as $T).bitor(0b1010 as $T)); assert!(0b1000 as $T == (0b1100 as $T).bitand(0b1010 as $T)); assert!(0b0110 as $T == (0b1100 as $T).bitxor(0b1010 as $T)); assert!(0b1110 as $T == (0b0111 as $T).shl(1)); assert!(0b0111 as $T == (0b1110 as $T).shr(1)); assert!(MAX - (0b1011 as $T) == (0b1011 as $T).not()); } const A: $T = 0b0101100; const B: $T = 0b0100001; const C: $T = 0b1111001; const _0: $T = 0; const _1: $T = !0; #[test] fn test_count_ones() { assert!(A.count_ones() == 3); assert!(B.count_ones() == 2); assert!(C.count_ones() == 5); } #[test] fn test_count_zeros() { assert!(A.count_zeros() == $T::BITS - 3); assert!(B.count_zeros() == $T::BITS - 2); assert!(C.count_zeros() == $T::BITS - 5); } #[test] fn test_leading_trailing_ones() { let a: $T = 0b0101_1111; assert_eq!(a.trailing_ones(), 5); assert_eq!((!a).leading_ones(), $T::BITS - 7); assert_eq!(a.reverse_bits().leading_ones(), 5); assert_eq!(_1.leading_ones(), $T::BITS); assert_eq!(_1.trailing_ones(), $T::BITS); assert_eq!((_1 << 1).trailing_ones(), 0); assert_eq!((_1 >> 1).leading_ones(), 0); assert_eq!((_1 << 1).leading_ones(), $T::BITS - 1); assert_eq!((_1 >> 1).trailing_ones(), $T::BITS - 1); assert_eq!(_0.leading_ones(), 0); assert_eq!(_0.trailing_ones(), 0); let x: $T = 0b0010_1100; assert_eq!(x.leading_ones(), 0); assert_eq!(x.trailing_ones(), 0); } #[test] fn test_rotate() { assert_eq!(A.rotate_left(6).rotate_right(2).rotate_right(4), A); assert_eq!(B.rotate_left(3).rotate_left(2).rotate_right(5), B); assert_eq!(C.rotate_left(6).rotate_right(2).rotate_right(4), C); // Rotating these should make no difference // // We test using 124 bits because to ensure that overlong bit shifts do // not cause undefined behaviour. See #10183. assert_eq!(_0.rotate_left(124), _0); assert_eq!(_1.rotate_left(124), _1); assert_eq!(_0.rotate_right(124), _0); assert_eq!(_1.rotate_right(124), _1); // Rotating by 0 should have no effect assert_eq!(A.rotate_left(0), A); assert_eq!(B.rotate_left(0), B); assert_eq!(C.rotate_left(0), C); // Rotating by a multiple of word size should also have no effect assert_eq!(A.rotate_left(128), A); assert_eq!(B.rotate_left(128), B); assert_eq!(C.rotate_left(128), C); } #[test] fn test_swap_bytes() { assert_eq!(A.swap_bytes().swap_bytes(), A); assert_eq!(B.swap_bytes().swap_bytes(), B); assert_eq!(C.swap_bytes().swap_bytes(), C); // Swapping these should make no difference assert_eq!(_0.swap_bytes(), _0); assert_eq!(_1.swap_bytes(), _1); } #[test] fn test_reverse_bits() { assert_eq!(A.reverse_bits().reverse_bits(), A); assert_eq!(B.reverse_bits().reverse_bits(), B); assert_eq!(C.reverse_bits().reverse_bits(), C); // Swapping these should make no difference assert_eq!(_0.reverse_bits(), _0); assert_eq!(_1.reverse_bits(), _1); } #[test] fn test_le() { assert_eq!($T::from_le(A.to_le()), A); assert_eq!($T::from_le(B.to_le()), B); assert_eq!($T::from_le(C.to_le()), C); assert_eq!($T::from_le(_0), _0); assert_eq!($T::from_le(_1), _1); assert_eq!(_0.to_le(), _0); assert_eq!(_1.to_le(), _1); } #[test] fn test_be() { assert_eq!($T::from_be(A.to_be()), A); assert_eq!($T::from_be(B.to_be()), B); assert_eq!($T::from_be(C.to_be()), C); assert_eq!($T::from_be(_0), _0); assert_eq!($T::from_be(_1), _1); assert_eq!(_0.to_be(), _0); assert_eq!(_1.to_be(), _1); } #[test] fn test_unsigned_checked_div() { assert!((10 as $T).checked_div(2) == Some(5)); assert!((5 as $T).checked_div(0) == None); } fn from_str(t: &str) -> Option { FromStr::from_str(t).ok() } #[test] pub fn test_from_str() { assert_eq!(from_str::<$T>("0"), Some(0 as $T)); assert_eq!(from_str::<$T>("3"), Some(3 as $T)); assert_eq!(from_str::<$T>("10"), Some(10 as $T)); assert_eq!(from_str::("123456789"), Some(123456789 as u32)); assert_eq!(from_str::<$T>("00100"), Some(100 as $T)); assert_eq!(from_str::<$T>(""), None); assert_eq!(from_str::<$T>(" "), None); assert_eq!(from_str::<$T>("x"), None); } #[test] pub fn test_parse_bytes() { assert_eq!($T::from_str_radix("123", 10), Ok(123 as $T)); assert_eq!($T::from_str_radix("1001", 2), Ok(9 as $T)); assert_eq!($T::from_str_radix("123", 8), Ok(83 as $T)); assert_eq!(u16::from_str_radix("123", 16), Ok(291 as u16)); assert_eq!(u16::from_str_radix("ffff", 16), Ok(65535 as u16)); assert_eq!($T::from_str_radix("z", 36), Ok(35 as $T)); assert_eq!($T::from_str_radix("Z", 10).ok(), None::<$T>); assert_eq!($T::from_str_radix("_", 2).ok(), None::<$T>); } #[test] fn test_pow() { let mut r = 2 as $T; assert_eq!(r.pow(2), 4 as $T); assert_eq!(r.pow(0), 1 as $T); assert_eq!(r.wrapping_pow(2), 4 as $T); assert_eq!(r.wrapping_pow(0), 1 as $T); assert_eq!(r.checked_pow(2), Some(4 as $T)); assert_eq!(r.checked_pow(0), Some(1 as $T)); assert_eq!(r.overflowing_pow(2), (4 as $T, false)); assert_eq!(r.overflowing_pow(0), (1 as $T, false)); assert_eq!(r.saturating_pow(2), 4 as $T); assert_eq!(r.saturating_pow(0), 1 as $T); r = MAX; // use `^` to represent .pow() with no overflow. // if itest::MAX == 2^j-1, then itest is a `j` bit int, // so that `itest::MAX*itest::MAX == 2^(2*j)-2^(j+1)+1`, // thussaturating_pow the overflowing result is exactly 1. assert_eq!(r.wrapping_pow(2), 1 as $T); assert_eq!(r.checked_pow(2), None); assert_eq!(r.overflowing_pow(2), (1 as $T, true)); assert_eq!(r.saturating_pow(2), MAX); } #[test] fn test_div_floor() { assert_eq!((8 as $T).div_floor(3), 2); } #[test] fn test_div_ceil() { assert_eq!((8 as $T).div_ceil(3), 3); } #[test] fn test_next_multiple_of() { assert_eq!((16 as $T).next_multiple_of(8), 16); assert_eq!((23 as $T).next_multiple_of(8), 24); assert_eq!(MAX.next_multiple_of(1), MAX); } #[test] fn test_checked_next_multiple_of() { assert_eq!((16 as $T).checked_next_multiple_of(8), Some(16)); assert_eq!((23 as $T).checked_next_multiple_of(8), Some(24)); assert_eq!((1 as $T).checked_next_multiple_of(0), None); assert_eq!(MAX.checked_next_multiple_of(2), None); } } }; }