macro_rules! uint_module {
    ($T:ident) => {
        use core::ops::{BitAnd, BitOr, BitXor, Not, Shl, Shr};
        use core::$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: FromStr>(t: &str) -> Option<T> {
            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 $T));
            assert_eq!(from_str::<u32>("123456789"), Some(123456789 as u32));
            assert_eq!(from_str::<$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_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);
        }

        #[cfg(not(miri))] // Miri is too slow
        #[test]
        fn test_lots_of_isqrt() {
            let n_max: $T = (1024 * 1024).min($T::MAX as u128) as $T;
            for n in 0..=n_max {
                let isqrt: $T = n.isqrt();

                assert!(isqrt.pow(2) <= n);
                assert!(isqrt + 1 == (1 as $T) << ($T::BITS / 2) || (isqrt + 1).pow(2) > n);
            }

            for n in ($T::MAX - 255)..=$T::MAX {
                let isqrt: $T = n.isqrt();

                assert!(isqrt.pow(2) <= n);
                assert!(isqrt + 1 == (1 as $T) << ($T::BITS / 2) || (isqrt + 1).pow(2) > n);
            }
        }

        #[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);
        }

        #[test]
        fn test_is_next_multiple_of() {
            assert!((12 as $T).is_multiple_of(4));
            assert!(!(12 as $T).is_multiple_of(5));
            assert!((0 as $T).is_multiple_of(0));
            assert!(!(12 as $T).is_multiple_of(0));
        }

        #[test]
        fn test_carrying_add() {
            assert_eq!($T::MAX.carrying_add(1, false), (0, true));
            assert_eq!($T::MAX.carrying_add(0, true), (0, true));
            assert_eq!($T::MAX.carrying_add(1, true), (1, true));

            assert_eq!($T::MIN.carrying_add($T::MAX, false), ($T::MAX, false));
            assert_eq!($T::MIN.carrying_add(0, true), (1, false));
            assert_eq!($T::MIN.carrying_add($T::MAX, true), (0, true));
        }

        #[test]
        fn test_borrowing_sub() {
            assert_eq!($T::MIN.borrowing_sub(1, false), ($T::MAX, true));
            assert_eq!($T::MIN.borrowing_sub(0, true), ($T::MAX, true));
            assert_eq!($T::MIN.borrowing_sub(1, true), ($T::MAX - 1, true));

            assert_eq!($T::MAX.borrowing_sub($T::MAX, false), (0, false));
            assert_eq!($T::MAX.borrowing_sub(0, true), ($T::MAX - 1, false));
            assert_eq!($T::MAX.borrowing_sub($T::MAX, true), ($T::MAX, true));
        }

        #[test]
        fn test_midpoint() {
            assert_eq!(<$T>::midpoint(1, 3), 2);
            assert_eq!(<$T>::midpoint(3, 1), 2);

            assert_eq!(<$T>::midpoint(0, 0), 0);
            assert_eq!(<$T>::midpoint(0, 2), 1);
            assert_eq!(<$T>::midpoint(2, 0), 1);
            assert_eq!(<$T>::midpoint(2, 2), 2);

            assert_eq!(<$T>::midpoint(1, 4), 2);
            assert_eq!(<$T>::midpoint(4, 1), 2);
            assert_eq!(<$T>::midpoint(3, 4), 3);
            assert_eq!(<$T>::midpoint(4, 3), 3);

            assert_eq!(<$T>::midpoint(<$T>::MIN, <$T>::MAX), (<$T>::MAX - <$T>::MIN) / 2);
            assert_eq!(<$T>::midpoint(<$T>::MAX, <$T>::MIN), (<$T>::MAX - <$T>::MIN) / 2);
            assert_eq!(<$T>::midpoint(<$T>::MIN, <$T>::MIN), <$T>::MIN);
            assert_eq!(<$T>::midpoint(<$T>::MAX, <$T>::MAX), <$T>::MAX);

            assert_eq!(<$T>::midpoint(<$T>::MIN, 6), <$T>::MIN / 2 + 3);
            assert_eq!(<$T>::midpoint(6, <$T>::MIN), <$T>::MIN / 2 + 3);
            assert_eq!(<$T>::midpoint(<$T>::MAX, 6), (<$T>::MAX - <$T>::MIN) / 2 + 3);
            assert_eq!(<$T>::midpoint(6, <$T>::MAX), (<$T>::MAX - <$T>::MIN) / 2 + 3);
        }
    };
}