use core::fmt;
use core::ops::{
Add, AddAssign, Div, DivAssign, Mul, MulAssign, Rem, RemAssign, Shl, ShlAssign, Shr, ShrAssign,
Sub, SubAssign,
};
use core::str::FromStr;
use forward_ref::{forward_ref_binop, forward_ref_op_assign};
use schemars::JsonSchema;
use serde::{de, ser, Deserialize, Deserializer, Serialize};
use std::ops::Not;
use crate::errors::{
CheckedMultiplyFractionError, CheckedMultiplyRatioError, ConversionOverflowError,
DivideByZeroError, OverflowError, OverflowOperation, StdError,
};
use crate::{
forward_ref_partial_eq, impl_mul_fraction, Fraction, Int128, Int256, Int512, Int64, Uint128,
Uint512, Uint64,
};
use bnum::types::U256;
use super::conversion::{forward_try_from, try_from_int_to_uint};
use super::num_consts::NumConsts;
#[derive(Copy, Clone, Default, Debug, PartialEq, Eq, PartialOrd, Ord, JsonSchema)]
pub struct Uint256(#[schemars(with = "String")] pub(crate) U256);
forward_ref_partial_eq!(Uint256, Uint256);
impl Uint256 {
pub const MAX: Uint256 = Uint256(U256::MAX);
pub const MIN: Uint256 = Uint256(U256::ZERO);
pub const fn new(value: [u8; 32]) -> Self {
Self::from_be_bytes(value)
}
#[inline]
pub const fn zero() -> Self {
Self(U256::ZERO)
}
#[inline]
pub const fn one() -> Self {
Self(U256::ONE)
}
#[must_use]
pub const fn from_be_bytes(data: [u8; 32]) -> Self {
let words: [u64; 4] = [
u64::from_le_bytes([
data[31], data[30], data[29], data[28], data[27], data[26], data[25], data[24],
]),
u64::from_le_bytes([
data[23], data[22], data[21], data[20], data[19], data[18], data[17], data[16],
]),
u64::from_le_bytes([
data[15], data[14], data[13], data[12], data[11], data[10], data[9], data[8],
]),
u64::from_le_bytes([
data[7], data[6], data[5], data[4], data[3], data[2], data[1], data[0],
]),
];
Self(U256::from_digits(words))
}
#[must_use]
pub const fn from_le_bytes(data: [u8; 32]) -> Self {
let words: [u64; 4] = [
u64::from_le_bytes([
data[0], data[1], data[2], data[3], data[4], data[5], data[6], data[7],
]),
u64::from_le_bytes([
data[8], data[9], data[10], data[11], data[12], data[13], data[14], data[15],
]),
u64::from_le_bytes([
data[16], data[17], data[18], data[19], data[20], data[21], data[22], data[23],
]),
u64::from_le_bytes([
data[24], data[25], data[26], data[27], data[28], data[29], data[30], data[31],
]),
];
Self(U256::from_digits(words))
}
#[must_use]
pub const fn from_u128(num: u128) -> Self {
let bytes = num.to_le_bytes();
Self::from_le_bytes([
bytes[0], bytes[1], bytes[2], bytes[3], bytes[4], bytes[5], bytes[6], bytes[7],
bytes[8], bytes[9], bytes[10], bytes[11], bytes[12], bytes[13], bytes[14], bytes[15],
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
])
}
#[must_use]
pub const fn from_uint128(num: Uint128) -> Self {
Self::from_u128(num.u128())
}
#[must_use = "this returns the result of the operation, without modifying the original"]
pub const fn to_be_bytes(self) -> [u8; 32] {
let words = self.0.digits();
let words = [
words[3].to_be_bytes(),
words[2].to_be_bytes(),
words[1].to_be_bytes(),
words[0].to_be_bytes(),
];
unsafe { core::mem::transmute::<[[u8; 8]; 4], [u8; 32]>(words) }
}
#[must_use = "this returns the result of the operation, without modifying the original"]
pub const fn to_le_bytes(self) -> [u8; 32] {
let words = self.0.digits();
let words = [
words[0].to_le_bytes(),
words[1].to_le_bytes(),
words[2].to_le_bytes(),
words[3].to_le_bytes(),
];
unsafe { core::mem::transmute::<[[u8; 8]; 4], [u8; 32]>(words) }
}
#[must_use]
pub const fn is_zero(&self) -> bool {
self.0.is_zero()
}
#[must_use = "this returns the result of the operation, without modifying the original"]
pub const fn pow(self, exp: u32) -> Self {
match self.0.checked_pow(exp) {
Some(val) => Self(val),
None => panic!("attempt to exponentiate with overflow"),
}
}
#[must_use = "this returns the result of the operation, without modifying the original"]
pub fn multiply_ratio<A: Into<Uint256>, B: Into<Uint256>>(
&self,
numerator: A,
denominator: B,
) -> Uint256 {
match self.checked_multiply_ratio(numerator, denominator) {
Ok(value) => value,
Err(CheckedMultiplyRatioError::DivideByZero) => {
panic!("Denominator must not be zero")
}
Err(CheckedMultiplyRatioError::Overflow) => panic!("Multiplication overflow"),
}
}
pub fn checked_multiply_ratio<A: Into<Uint256>, B: Into<Uint256>>(
&self,
numerator: A,
denominator: B,
) -> Result<Uint256, CheckedMultiplyRatioError> {
let numerator: Uint256 = numerator.into();
let denominator: Uint256 = denominator.into();
if denominator.is_zero() {
return Err(CheckedMultiplyRatioError::DivideByZero);
}
match (self.full_mul(numerator) / Uint512::from(denominator)).try_into() {
Ok(ratio) => Ok(ratio),
Err(_) => Err(CheckedMultiplyRatioError::Overflow),
}
}
#[must_use = "this returns the result of the operation, without modifying the original"]
pub fn full_mul(self, rhs: impl Into<Uint256>) -> Uint512 {
Uint512::from(self)
.checked_mul(Uint512::from(rhs.into()))
.unwrap()
}
pub fn checked_add(self, other: Self) -> Result<Self, OverflowError> {
self.0
.checked_add(other.0)
.map(Self)
.ok_or_else(|| OverflowError::new(OverflowOperation::Add, self, other))
}
pub fn checked_sub(self, other: Self) -> Result<Self, OverflowError> {
self.0
.checked_sub(other.0)
.map(Self)
.ok_or_else(|| OverflowError::new(OverflowOperation::Sub, self, other))
}
pub fn checked_mul(self, other: Self) -> Result<Self, OverflowError> {
self.0
.checked_mul(other.0)
.map(Self)
.ok_or_else(|| OverflowError::new(OverflowOperation::Mul, self, other))
}
pub fn checked_pow(self, exp: u32) -> Result<Self, OverflowError> {
self.0
.checked_pow(exp)
.map(Self)
.ok_or_else(|| OverflowError::new(OverflowOperation::Pow, self, exp))
}
pub fn checked_div(self, other: Self) -> Result<Self, DivideByZeroError> {
self.0
.checked_div(other.0)
.map(Self)
.ok_or_else(|| DivideByZeroError::new(self))
}
pub fn checked_div_euclid(self, other: Self) -> Result<Self, DivideByZeroError> {
self.checked_div(other)
}
pub fn checked_rem(self, other: Self) -> Result<Self, DivideByZeroError> {
self.0
.checked_rem(other.0)
.map(Self)
.ok_or_else(|| DivideByZeroError::new(self))
}
pub fn checked_shr(self, other: u32) -> Result<Self, OverflowError> {
if other >= 256 {
return Err(OverflowError::new(OverflowOperation::Shr, self, other));
}
Ok(Self(self.0.shr(other)))
}
pub fn checked_shl(self, other: u32) -> Result<Self, OverflowError> {
if other >= 256 {
return Err(OverflowError::new(OverflowOperation::Shl, self, other));
}
Ok(Self(self.0.shl(other)))
}
#[must_use = "this returns the result of the operation, without modifying the original"]
#[inline]
pub fn wrapping_add(self, other: Self) -> Self {
Self(self.0.wrapping_add(other.0))
}
#[must_use = "this returns the result of the operation, without modifying the original"]
#[inline]
pub fn wrapping_sub(self, other: Self) -> Self {
Self(self.0.wrapping_sub(other.0))
}
#[must_use = "this returns the result of the operation, without modifying the original"]
#[inline]
pub fn wrapping_mul(self, other: Self) -> Self {
Self(self.0.wrapping_mul(other.0))
}
#[must_use = "this returns the result of the operation, without modifying the original"]
#[inline]
pub fn wrapping_pow(self, other: u32) -> Self {
Self(self.0.wrapping_pow(other))
}
#[must_use = "this returns the result of the operation, without modifying the original"]
pub fn saturating_add(self, other: Self) -> Self {
Self(self.0.saturating_add(other.0))
}
#[must_use = "this returns the result of the operation, without modifying the original"]
pub fn saturating_sub(self, other: Self) -> Self {
Self(self.0.saturating_sub(other.0))
}
#[must_use = "this returns the result of the operation, without modifying the original"]
pub fn saturating_mul(self, other: Self) -> Self {
Self(self.0.saturating_mul(other.0))
}
#[must_use = "this returns the result of the operation, without modifying the original"]
pub fn saturating_pow(self, exp: u32) -> Self {
Self(self.0.saturating_pow(exp))
}
#[must_use = "this returns the result of the operation, without modifying the original"]
pub const fn strict_add(self, rhs: Self) -> Self {
match self.0.checked_add(rhs.0) {
None => panic!("attempt to add with overflow"),
Some(sum) => Self(sum),
}
}
#[must_use = "this returns the result of the operation, without modifying the original"]
pub const fn strict_sub(self, other: Self) -> Self {
match self.0.checked_sub(other.0) {
None => panic!("attempt to subtract with overflow"),
Some(diff) => Self(diff),
}
}
#[must_use = "this returns the result of the operation, without modifying the original"]
pub const fn abs_diff(self, other: Self) -> Self {
Self(self.0.abs_diff(other.0))
}
}
impl NumConsts for Uint256 {
const ZERO: Self = Self::zero();
const ONE: Self = Self::one();
const MAX: Self = Self::MAX;
const MIN: Self = Self::MIN;
}
impl_mul_fraction!(Uint256);
impl From<Uint128> for Uint256 {
fn from(val: Uint128) -> Self {
val.u128().into()
}
}
impl From<Uint64> for Uint256 {
fn from(val: Uint64) -> Self {
val.u64().into()
}
}
impl From<u128> for Uint256 {
fn from(val: u128) -> Self {
Uint256(val.into())
}
}
impl From<u64> for Uint256 {
fn from(val: u64) -> Self {
Uint256(val.into())
}
}
impl From<u32> for Uint256 {
fn from(val: u32) -> Self {
Uint256(val.into())
}
}
impl From<u16> for Uint256 {
fn from(val: u16) -> Self {
Uint256(val.into())
}
}
impl From<u8> for Uint256 {
fn from(val: u8) -> Self {
Uint256(val.into())
}
}
forward_try_from!(Uint256, Uint128);
forward_try_from!(Uint256, Uint64);
try_from_int_to_uint!(Int64, Uint256);
try_from_int_to_uint!(Int128, Uint256);
try_from_int_to_uint!(Int256, Uint256);
try_from_int_to_uint!(Int512, Uint256);
impl TryFrom<&str> for Uint256 {
type Error = StdError;
fn try_from(val: &str) -> Result<Self, Self::Error> {
Self::from_str(val)
}
}
impl FromStr for Uint256 {
type Err = StdError;
fn from_str(s: &str) -> Result<Self, Self::Err> {
if s.is_empty() {
return Err(StdError::generic_err("Parsing u256: received empty string"));
}
match U256::from_str_radix(s, 10) {
Ok(u) => Ok(Uint256(u)),
Err(e) => Err(StdError::generic_err(format!("Parsing u256: {e}"))),
}
}
}
impl From<Uint256> for String {
fn from(original: Uint256) -> Self {
original.to_string()
}
}
impl fmt::Display for Uint256 {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
self.0.fmt(f)
}
}
impl Add<Uint256> for Uint256 {
type Output = Self;
fn add(self, rhs: Self) -> Self {
self.strict_add(rhs)
}
}
forward_ref_binop!(impl Add, add for Uint256, Uint256);
impl Sub<Uint256> for Uint256 {
type Output = Self;
fn sub(self, rhs: Self) -> Self {
self.strict_sub(rhs)
}
}
forward_ref_binop!(impl Sub, sub for Uint256, Uint256);
impl SubAssign<Uint256> for Uint256 {
fn sub_assign(&mut self, rhs: Uint256) {
*self = *self - rhs;
}
}
forward_ref_op_assign!(impl SubAssign, sub_assign for Uint256, Uint256);
impl Div<Uint256> for Uint256 {
type Output = Self;
fn div(self, rhs: Self) -> Self::Output {
Self(
self.0
.checked_div(rhs.0)
.expect("attempt to divide by zero"),
)
}
}
impl<'a> Div<&'a Uint256> for Uint256 {
type Output = Self;
fn div(self, rhs: &'a Uint256) -> Self::Output {
self / *rhs
}
}
impl Rem for Uint256 {
type Output = Self;
#[inline]
fn rem(self, rhs: Self) -> Self {
Self(self.0.rem(rhs.0))
}
}
forward_ref_binop!(impl Rem, rem for Uint256, Uint256);
impl Not for Uint256 {
type Output = Self;
fn not(self) -> Self::Output {
Self(!self.0)
}
}
impl RemAssign<Uint256> for Uint256 {
fn rem_assign(&mut self, rhs: Uint256) {
*self = *self % rhs;
}
}
forward_ref_op_assign!(impl RemAssign, rem_assign for Uint256, Uint256);
impl Mul<Uint256> for Uint256 {
type Output = Self;
fn mul(self, rhs: Self) -> Self::Output {
Self(
self.0
.checked_mul(rhs.0)
.expect("attempt to multiply with overflow"),
)
}
}
forward_ref_binop!(impl Mul, mul for Uint256, Uint256);
impl MulAssign<Uint256> for Uint256 {
fn mul_assign(&mut self, rhs: Self) {
*self = *self * rhs;
}
}
forward_ref_op_assign!(impl MulAssign, mul_assign for Uint256, Uint256);
impl Shr<u32> for Uint256 {
type Output = Self;
fn shr(self, rhs: u32) -> Self::Output {
self.checked_shr(rhs).unwrap_or_else(|_| {
panic!(
"right shift error: {rhs} is larger or equal than the number of bits in Uint256",
)
})
}
}
impl<'a> Shr<&'a u32> for Uint256 {
type Output = Self;
fn shr(self, rhs: &'a u32) -> Self::Output {
self.shr(*rhs)
}
}
impl Shl<u32> for Uint256 {
type Output = Self;
fn shl(self, rhs: u32) -> Self::Output {
self.checked_shl(rhs)
.expect("attempt to shift left with overflow")
}
}
impl<'a> Shl<&'a u32> for Uint256 {
type Output = Self;
fn shl(self, rhs: &'a u32) -> Self::Output {
self.shl(*rhs)
}
}
impl AddAssign<Uint256> for Uint256 {
fn add_assign(&mut self, rhs: Uint256) {
*self = *self + rhs;
}
}
impl<'a> AddAssign<&'a Uint256> for Uint256 {
fn add_assign(&mut self, rhs: &'a Uint256) {
*self = *self + rhs;
}
}
impl DivAssign<Uint256> for Uint256 {
fn div_assign(&mut self, rhs: Self) {
*self = *self / rhs;
}
}
impl<'a> DivAssign<&'a Uint256> for Uint256 {
fn div_assign(&mut self, rhs: &'a Uint256) {
*self = *self / rhs;
}
}
impl ShrAssign<u32> for Uint256 {
fn shr_assign(&mut self, rhs: u32) {
*self = Shr::<u32>::shr(*self, rhs);
}
}
impl<'a> ShrAssign<&'a u32> for Uint256 {
fn shr_assign(&mut self, rhs: &'a u32) {
*self = Shr::<u32>::shr(*self, *rhs);
}
}
impl ShlAssign<u32> for Uint256 {
fn shl_assign(&mut self, rhs: u32) {
*self = self.shl(rhs);
}
}
impl<'a> ShlAssign<&'a u32> for Uint256 {
fn shl_assign(&mut self, rhs: &'a u32) {
*self = self.shl(*rhs);
}
}
impl Serialize for Uint256 {
fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
where
S: ser::Serializer,
{
serializer.serialize_str(&self.to_string())
}
}
impl<'de> Deserialize<'de> for Uint256 {
fn deserialize<D>(deserializer: D) -> Result<Uint256, D::Error>
where
D: Deserializer<'de>,
{
deserializer.deserialize_str(Uint256Visitor)
}
}
struct Uint256Visitor;
impl<'de> de::Visitor<'de> for Uint256Visitor {
type Value = Uint256;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str("string-encoded integer")
}
fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
where
E: de::Error,
{
Uint256::try_from(v).map_err(|e| E::custom(format!("invalid Uint256 '{v}' - {e}")))
}
}
impl<A> core::iter::Sum<A> for Uint256
where
Self: Add<A, Output = Self>,
{
fn sum<I: Iterator<Item = A>>(iter: I) -> Self {
iter.fold(Self::zero(), Add::add)
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::errors::CheckedMultiplyFractionError::{ConversionOverflow, DivideByZero};
use crate::math::conversion::test_try_from_int_to_uint;
use crate::{from_json, to_json_vec, Decimal, Decimal256};
#[test]
fn size_of_works() {
assert_eq!(core::mem::size_of::<Uint256>(), 32);
}
#[test]
fn uint256_new_works() {
let num = Uint256::new([1; 32]);
let a: [u8; 32] = num.to_be_bytes();
assert_eq!(a, [1; 32]);
let be_bytes = [
0u8, 222u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 1u8, 2u8, 3u8,
];
let num = Uint256::new(be_bytes);
let resulting_bytes: [u8; 32] = num.to_be_bytes();
assert_eq!(be_bytes, resulting_bytes);
}
#[test]
fn uint256_not_works() {
let num = Uint256::new([1; 32]);
let a = (!num).to_be_bytes();
assert_eq!(a, [254; 32]);
assert_eq!(!Uint256::MAX, Uint256::MIN);
assert_eq!(!Uint256::MIN, Uint256::MAX);
}
#[test]
fn uint256_zero_works() {
let zero = Uint256::zero();
assert_eq!(
zero.to_be_bytes(),
[
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0
]
);
}
#[test]
fn uin256_one_works() {
let one = Uint256::one();
assert_eq!(
one.to_be_bytes(),
[
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 1,
]
);
}
#[test]
fn uint256_from_be_bytes() {
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(0u128));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 42,
]);
assert_eq!(a, Uint256::from(42u128));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 1,
]);
assert_eq!(a, Uint256::from(1u128));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 1, 0,
]);
assert_eq!(a, Uint256::from(256u128));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0,
]);
assert_eq!(a, Uint256::from(65536u128));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(16777216u128));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(4294967296u128));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1099511627776u128));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(281474976710656u128));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(72057594037927936u128));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(18446744073709551616u128));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(4722366482869645213696u128));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1208925819614629174706176u128));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1329227995784915872903807060280344576u128));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 16));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 17));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 18));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 19));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 20));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 21));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 22));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 23));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 24));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 25));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 26));
let a = Uint256::from_be_bytes([
0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 27));
let a = Uint256::from_be_bytes([
0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 28));
let a = Uint256::from_be_bytes([
0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 29));
let a = Uint256::from_be_bytes([
0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 30));
let a = Uint256::from_be_bytes([
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 31));
}
#[test]
fn uint256_from_le_bytes() {
let a = Uint256::from_le_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(0u128));
let a = Uint256::from_le_bytes([
42, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(42u128));
let a = Uint256::from_le_bytes([
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128));
let a = Uint256::from_le_bytes([
0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(256u128));
let a = Uint256::from_le_bytes([
0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(65536u128));
let a = Uint256::from_le_bytes([
0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(16777216u128));
let a = Uint256::from_le_bytes([
0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(4294967296u128));
let a = Uint256::from_le_bytes([
0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(72057594037927936u128));
let a = Uint256::from_le_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(18446744073709551616u128));
let a = Uint256::from_le_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1329227995784915872903807060280344576u128));
let a = Uint256::from_le_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 16));
let a = Uint256::from_le_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 17));
let a = Uint256::from_le_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 18));
let a = Uint256::from_le_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 19));
let a = Uint256::from_le_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 20));
let a = Uint256::from_le_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 21));
let a = Uint256::from_le_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 22));
let a = Uint256::from_le_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 23));
let a = Uint256::from_le_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 24));
let a = Uint256::from_le_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 25));
let a = Uint256::from_le_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 26));
let a = Uint256::from_le_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 27));
let a = Uint256::from_le_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1,
0, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 28));
let a = Uint256::from_le_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
1, 0, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 29));
let a = Uint256::from_le_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 1, 0,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 30));
let a = Uint256::from_le_bytes([
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 1,
]);
assert_eq!(a, Uint256::from(1u128) << (8 * 31));
}
#[test]
fn uint256_endianness() {
let be_bytes = [
0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 1u8, 2u8, 3u8,
];
let le_bytes = [
3u8, 2u8, 1u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
];
let num1 = Uint256::new(be_bytes);
let num2 = Uint256::from_be_bytes(be_bytes);
let num3 = Uint256::from_le_bytes(le_bytes);
assert_eq!(num1, Uint256::from(65536u32 + 512 + 3));
assert_eq!(num1, num2);
assert_eq!(num1, num3);
}
#[test]
fn uint256_convert_from() {
let a = Uint256::from(5u128);
assert_eq!(a.0, U256::from(5u32));
let a = Uint256::from(5u64);
assert_eq!(a.0, U256::from(5u32));
let a = Uint256::from(5u32);
assert_eq!(a.0, U256::from(5u32));
let a = Uint256::from(5u16);
assert_eq!(a.0, U256::from(5u32));
let a = Uint256::from(5u8);
assert_eq!(a.0, U256::from(5u32));
let result = Uint256::try_from("34567");
assert_eq!(
result.unwrap().0,
U256::from_str_radix("34567", 10).unwrap()
);
let result = Uint256::try_from("1.23");
assert!(result.is_err());
}
#[test]
fn uint256_try_from_signed_works() {
test_try_from_int_to_uint::<Int64, Uint256>("Int64", "Uint256");
test_try_from_int_to_uint::<Int128, Uint256>("Int128", "Uint256");
test_try_from_int_to_uint::<Int256, Uint256>("Int256", "Uint256");
test_try_from_int_to_uint::<Int512, Uint256>("Int512", "Uint256");
}
#[test]
fn uint256_try_into() {
assert!(Uint64::try_from(Uint256::MAX).is_err());
assert!(Uint128::try_from(Uint256::MAX).is_err());
assert_eq!(Uint64::try_from(Uint256::zero()), Ok(Uint64::zero()));
assert_eq!(Uint128::try_from(Uint256::zero()), Ok(Uint128::zero()));
assert_eq!(
Uint64::try_from(Uint256::from(42u64)),
Ok(Uint64::from(42u64))
);
assert_eq!(
Uint128::try_from(Uint256::from(42u128)),
Ok(Uint128::from(42u128))
);
}
#[test]
fn uint256_convert_to_uint128() {
let source = Uint256::from(42u128);
let target = Uint128::try_from(source);
assert_eq!(target, Ok(Uint128::new(42u128)));
let source = Uint256::MAX;
let target = Uint128::try_from(source);
assert_eq!(
target,
Err(ConversionOverflowError::new(
"Uint256",
"Uint128",
Uint256::MAX.to_string()
))
);
}
#[test]
fn uint256_from_u128() {
assert_eq!(
Uint256::from_u128(123u128),
Uint256::from_str("123").unwrap()
);
assert_eq!(
Uint256::from_u128(9785746283745u128),
Uint256::from_str("9785746283745").unwrap()
);
}
#[test]
fn uint256_from_uint128() {
assert_eq!(
Uint256::from_uint128(Uint128::new(123)),
Uint256::from_str("123").unwrap()
);
assert_eq!(
Uint256::from_uint128(Uint128::new(9785746283745)),
Uint256::from_str("9785746283745").unwrap()
);
}
#[test]
fn uint256_implements_display() {
let a = Uint256::from(12345u32);
assert_eq!(format!("Embedded: {a}"), "Embedded: 12345");
assert_eq!(a.to_string(), "12345");
let a = Uint256::zero();
assert_eq!(format!("Embedded: {a}"), "Embedded: 0");
assert_eq!(a.to_string(), "0");
}
#[test]
fn uint256_display_padding_works() {
let a = Uint256::from(123u64);
assert_eq!(format!("Embedded: {a:05}"), "Embedded: 00123");
let a = Uint256::from(123u64);
assert_eq!(format!("Embedded: {a:02}"), "Embedded: 123");
}
#[test]
fn uint256_to_be_bytes_works() {
assert_eq!(
Uint256::zero().to_be_bytes(),
[
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0,
]
);
assert_eq!(
Uint256::MAX.to_be_bytes(),
[
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff,
]
);
assert_eq!(
Uint256::from(1u128).to_be_bytes(),
[
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 1
]
);
assert_eq!(
Uint256::from(240282366920938463463374607431768124608u128).to_be_bytes(),
[
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 180, 196, 179, 87, 165, 121, 59,
133, 246, 117, 221, 191, 255, 254, 172, 192
]
);
assert_eq!(
Uint256::from_be_bytes([
233, 2, 240, 200, 115, 150, 240, 218, 88, 106, 45, 208, 134, 238, 119, 85, 22, 14,
88, 166, 195, 154, 73, 64, 10, 44, 252, 96, 230, 187, 38, 29
])
.to_be_bytes(),
[
233, 2, 240, 200, 115, 150, 240, 218, 88, 106, 45, 208, 134, 238, 119, 85, 22, 14,
88, 166, 195, 154, 73, 64, 10, 44, 252, 96, 230, 187, 38, 29
]
);
}
#[test]
fn uint256_to_le_bytes_works() {
assert_eq!(
Uint256::zero().to_le_bytes(),
[
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0
]
);
assert_eq!(
Uint256::MAX.to_le_bytes(),
[
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff, 0xff,
0xff, 0xff, 0xff, 0xff
]
);
assert_eq!(
Uint256::from(1u128).to_le_bytes(),
[
1, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0
]
);
assert_eq!(
Uint256::from(240282366920938463463374607431768124608u128).to_le_bytes(),
[
192, 172, 254, 255, 191, 221, 117, 246, 133, 59, 121, 165, 87, 179, 196, 180, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0
]
);
assert_eq!(
Uint256::from_be_bytes([
233, 2, 240, 200, 115, 150, 240, 218, 88, 106, 45, 208, 134, 238, 119, 85, 22, 14,
88, 166, 195, 154, 73, 64, 10, 44, 252, 96, 230, 187, 38, 29
])
.to_le_bytes(),
[
29, 38, 187, 230, 96, 252, 44, 10, 64, 73, 154, 195, 166, 88, 14, 22, 85, 119, 238,
134, 208, 45, 106, 88, 218, 240, 150, 115, 200, 240, 2, 233
]
);
}
#[test]
fn uint256_is_zero_works() {
assert!(Uint256::zero().is_zero());
assert!(Uint256(U256::from(0u32)).is_zero());
assert!(!Uint256::from(1u32).is_zero());
assert!(!Uint256::from(123u32).is_zero());
}
#[test]
fn uint256_wrapping_methods() {
assert_eq!(
Uint256::from(2u32).wrapping_add(Uint256::from(2u32)),
Uint256::from(4u32)
); assert_eq!(
Uint256::MAX.wrapping_add(Uint256::from(1u32)),
Uint256::from(0u32)
); assert_eq!(
Uint256::from(7u32).wrapping_sub(Uint256::from(5u32)),
Uint256::from(2u32)
); assert_eq!(
Uint256::from(0u32).wrapping_sub(Uint256::from(1u32)),
Uint256::MAX
); assert_eq!(
Uint256::from(3u32).wrapping_mul(Uint256::from(2u32)),
Uint256::from(6u32)
); assert_eq!(
Uint256::MAX.wrapping_mul(Uint256::from(2u32)),
Uint256::MAX - Uint256::one()
); assert_eq!(Uint256::from(2u32).wrapping_pow(3), Uint256::from(8u32)); assert_eq!(Uint256::MAX.wrapping_pow(2), Uint256::from(1u32)); }
#[test]
fn uint256_json() {
let orig = Uint256::from(1234567890987654321u128);
let serialized = to_json_vec(&orig).unwrap();
assert_eq!(serialized.as_slice(), b"\"1234567890987654321\"");
let parsed: Uint256 = from_json(serialized).unwrap();
assert_eq!(parsed, orig);
}
#[test]
fn uint256_compare() {
let a = Uint256::from(12345u32);
let b = Uint256::from(23456u32);
assert!(a < b);
assert!(b > a);
assert_eq!(a, Uint256::from(12345u32));
}
#[test]
#[allow(clippy::op_ref)]
fn uint256_math() {
let a = Uint256::from(12345u32);
let b = Uint256::from(23456u32);
assert_eq!(b - a, Uint256::from(11111u32));
assert_eq!(b - &a, Uint256::from(11111u32));
let mut c = Uint256::from(300000u32);
c += b;
assert_eq!(c, Uint256::from(323456u32));
let mut d = Uint256::from(300000u32);
d += &b;
assert_eq!(d, Uint256::from(323456u32));
let mut c = Uint256::from(300000u32);
c -= b;
assert_eq!(c, Uint256::from(276544u32));
let mut d = Uint256::from(300000u32);
d -= &b;
assert_eq!(d, Uint256::from(276544u32));
let underflow_result = a.checked_sub(b);
let OverflowError {
operand1, operand2, ..
} = underflow_result.unwrap_err();
assert_eq!((operand1, operand2), (a.to_string(), b.to_string()));
}
#[test]
#[allow(clippy::op_ref)]
fn uint256_add_works() {
assert_eq!(
Uint256::from(2u32) + Uint256::from(1u32),
Uint256::from(3u32)
);
assert_eq!(
Uint256::from(2u32) + Uint256::from(0u32),
Uint256::from(2u32)
);
let a = Uint256::from(10u32);
let b = Uint256::from(3u32);
let expected = Uint256::from(13u32);
assert_eq!(a + b, expected);
assert_eq!(a + &b, expected);
assert_eq!(&a + b, expected);
assert_eq!(&a + &b, expected);
}
#[test]
#[should_panic(expected = "attempt to add with overflow")]
fn uint256_add_overflow_panics() {
let max = Uint256::new([255u8; 32]);
let _ = max + Uint256::from(12u32);
}
#[test]
#[allow(clippy::op_ref)]
fn uint256_sub_works() {
assert_eq!(
Uint256::from(2u32) - Uint256::from(1u32),
Uint256::from(1u32)
);
assert_eq!(
Uint256::from(2u32) - Uint256::from(0u32),
Uint256::from(2u32)
);
assert_eq!(
Uint256::from(2u32) - Uint256::from(2u32),
Uint256::from(0u32)
);
let a = Uint256::from(10u32);
let b = Uint256::from(3u32);
let expected = Uint256::from(7u32);
assert_eq!(a - b, expected);
assert_eq!(a - &b, expected);
assert_eq!(&a - b, expected);
assert_eq!(&a - &b, expected);
}
#[test]
#[should_panic]
fn uint256_sub_overflow_panics() {
let _ = Uint256::from(1u32) - Uint256::from(2u32);
}
#[test]
fn uint256_sub_assign_works() {
let mut a = Uint256::from(14u32);
a -= Uint256::from(2u32);
assert_eq!(a, Uint256::from(12u32));
let mut a = Uint256::from(10u32);
let b = Uint256::from(3u32);
let expected = Uint256::from(7u32);
a -= &b;
assert_eq!(a, expected);
}
#[test]
#[allow(clippy::op_ref)]
fn uint256_mul_works() {
assert_eq!(
Uint256::from(2u32) * Uint256::from(3u32),
Uint256::from(6u32)
);
assert_eq!(Uint256::from(2u32) * Uint256::zero(), Uint256::zero());
let a = Uint256::from(11u32);
let b = Uint256::from(3u32);
let expected = Uint256::from(33u32);
assert_eq!(a * b, expected);
assert_eq!(a * &b, expected);
assert_eq!(&a * b, expected);
assert_eq!(&a * &b, expected);
}
#[test]
fn uint256_mul_assign_works() {
let mut a = Uint256::from(14u32);
a *= Uint256::from(2u32);
assert_eq!(a, Uint256::from(28u32));
let mut a = Uint256::from(10u32);
let b = Uint256::from(3u32);
a *= &b;
assert_eq!(a, Uint256::from(30u32));
}
#[test]
fn uint256_pow_works() {
assert_eq!(Uint256::from(2u32).pow(2), Uint256::from(4u32));
assert_eq!(Uint256::from(2u32).pow(10), Uint256::from(1024u32));
}
#[test]
#[should_panic]
fn uint256_pow_overflow_panics() {
_ = Uint256::MAX.pow(2u32);
}
#[test]
fn uint256_multiply_ratio_works() {
let base = Uint256::from(500u32);
assert_eq!(base.multiply_ratio(1u128, 1u128), base);
assert_eq!(base.multiply_ratio(3u128, 3u128), base);
assert_eq!(base.multiply_ratio(654321u128, 654321u128), base);
assert_eq!(base.multiply_ratio(Uint256::MAX, Uint256::MAX), base);
assert_eq!(base.multiply_ratio(3u128, 2u128), Uint256::from(750u32));
assert_eq!(
base.multiply_ratio(333333u128, 222222u128),
Uint256::from(750u32)
);
assert_eq!(base.multiply_ratio(2u128, 3u128), Uint256::from(333u32));
assert_eq!(
base.multiply_ratio(222222u128, 333333u128),
Uint256::from(333u32)
);
assert_eq!(base.multiply_ratio(5u128, 6u128), Uint256::from(416u32));
assert_eq!(base.multiply_ratio(100u128, 120u128), Uint256::from(416u32));
}
#[test]
fn uint256_multiply_ratio_does_not_overflow_when_result_fits() {
let base = Uint256::MAX - Uint256::from(9u8);
assert_eq!(base.multiply_ratio(2u128, 2u128), base);
}
#[test]
#[should_panic]
fn uint256_multiply_ratio_panicks_on_overflow() {
let base = Uint256::MAX - Uint256::from(9u8);
assert_eq!(base.multiply_ratio(2u128, 1u128), base);
}
#[test]
#[should_panic(expected = "Denominator must not be zero")]
fn uint256_multiply_ratio_panics_for_zero_denominator() {
_ = Uint256::from(500u32).multiply_ratio(1u128, 0u128);
}
#[test]
fn uint256_checked_multiply_ratio_does_not_panic() {
assert_eq!(
Uint256::from(500u32).checked_multiply_ratio(1u128, 0u128),
Err(CheckedMultiplyRatioError::DivideByZero),
);
assert_eq!(
Uint256::from(500u32).checked_multiply_ratio(Uint256::MAX, 1u128),
Err(CheckedMultiplyRatioError::Overflow),
);
}
#[test]
fn uint256_shr_works() {
let original = Uint256::new([
0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 2u8, 0u8, 4u8, 2u8,
]);
let shifted = Uint256::new([
0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 128u8, 1u8, 0u8,
]);
assert_eq!(original >> 2u32, shifted);
}
#[test]
#[should_panic]
fn uint256_shr_overflow_panics() {
let _ = Uint256::from(1u32) >> 256u32;
}
#[test]
fn uint256_shl_works() {
let original = Uint256::new([
64u8, 128u8, 1u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
]);
let shifted = Uint256::new([
2u8, 0u8, 4u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8, 0u8,
]);
assert_eq!(original << 2u32, shifted);
}
#[test]
#[should_panic]
fn uint256_shl_overflow_panics() {
let _ = Uint256::from(1u32) << 256u32;
}
#[test]
fn sum_works() {
let nums = vec![
Uint256::from(17u32),
Uint256::from(123u32),
Uint256::from(540u32),
Uint256::from(82u32),
];
let expected = Uint256::from(762u32);
let sum_as_ref: Uint256 = nums.iter().sum();
assert_eq!(expected, sum_as_ref);
let sum_as_owned: Uint256 = nums.into_iter().sum();
assert_eq!(expected, sum_as_owned);
}
#[test]
fn uint256_methods() {
assert!(matches!(
Uint256::MAX.checked_add(Uint256::from(1u32)),
Err(OverflowError { .. })
));
assert_eq!(
Uint256::from(1u32).checked_add(Uint256::from(1u32)),
Ok(Uint256::from(2u32)),
);
assert!(matches!(
Uint256::from(0u32).checked_sub(Uint256::from(1u32)),
Err(OverflowError { .. })
));
assert_eq!(
Uint256::from(2u32).checked_sub(Uint256::from(1u32)),
Ok(Uint256::from(1u32)),
);
assert!(matches!(
Uint256::MAX.checked_mul(Uint256::from(2u32)),
Err(OverflowError { .. })
));
assert_eq!(
Uint256::from(2u32).checked_mul(Uint256::from(2u32)),
Ok(Uint256::from(4u32)),
);
assert!(matches!(
Uint256::MAX.checked_pow(2u32),
Err(OverflowError { .. })
));
assert_eq!(
Uint256::from(2u32).checked_pow(3u32),
Ok(Uint256::from(8u32)),
);
assert!(matches!(
Uint256::MAX.checked_div(Uint256::from(0u32)),
Err(DivideByZeroError { .. })
));
assert_eq!(
Uint256::from(6u32).checked_div(Uint256::from(2u32)),
Ok(Uint256::from(3u32)),
);
assert!(matches!(
Uint256::MAX.checked_div_euclid(Uint256::from(0u32)),
Err(DivideByZeroError { .. })
));
assert_eq!(
Uint256::from(6u32).checked_div_euclid(Uint256::from(2u32)),
Ok(Uint256::from(3u32)),
);
assert_eq!(
Uint256::from(7u32).checked_div_euclid(Uint256::from(2u32)),
Ok(Uint256::from(3u32)),
);
assert!(matches!(
Uint256::MAX.checked_rem(Uint256::from(0u32)),
Err(DivideByZeroError { .. })
));
assert_eq!(
Uint256::MAX.saturating_add(Uint256::from(1u32)),
Uint256::MAX
);
assert_eq!(
Uint256::from(0u32).saturating_sub(Uint256::from(1u32)),
Uint256::from(0u32)
);
assert_eq!(
Uint256::MAX.saturating_mul(Uint256::from(2u32)),
Uint256::MAX
);
assert_eq!(
Uint256::from(4u32).saturating_pow(2u32),
Uint256::from(16u32)
);
assert_eq!(Uint256::MAX.saturating_pow(2u32), Uint256::MAX);
}
#[test]
#[allow(clippy::op_ref)]
fn uint256_implements_rem() {
let a = Uint256::from(10u32);
assert_eq!(a % Uint256::from(10u32), Uint256::zero());
assert_eq!(a % Uint256::from(2u32), Uint256::zero());
assert_eq!(a % Uint256::from(1u32), Uint256::zero());
assert_eq!(a % Uint256::from(3u32), Uint256::from(1u32));
assert_eq!(a % Uint256::from(4u32), Uint256::from(2u32));
let a = Uint256::from(10u32);
let b = Uint256::from(3u32);
let expected = Uint256::from(1u32);
assert_eq!(a % b, expected);
assert_eq!(a % &b, expected);
assert_eq!(&a % b, expected);
assert_eq!(&a % &b, expected);
}
#[test]
#[should_panic(expected = "divisor of zero")]
fn uint256_rem_panics_for_zero() {
let _ = Uint256::from(10u32) % Uint256::zero();
}
#[test]
#[allow(clippy::op_ref)]
fn uint256_rem_works() {
assert_eq!(
Uint256::from(12u32) % Uint256::from(10u32),
Uint256::from(2u32)
);
assert_eq!(Uint256::from(50u32) % Uint256::from(5u32), Uint256::zero());
let a = Uint256::from(42u32);
let b = Uint256::from(5u32);
let expected = Uint256::from(2u32);
assert_eq!(a % b, expected);
assert_eq!(a % &b, expected);
assert_eq!(&a % b, expected);
assert_eq!(&a % &b, expected);
}
#[test]
fn uint256_rem_assign_works() {
let mut a = Uint256::from(30u32);
a %= Uint256::from(4u32);
assert_eq!(a, Uint256::from(2u32));
let mut a = Uint256::from(25u32);
let b = Uint256::from(6u32);
a %= &b;
assert_eq!(a, Uint256::from(1u32));
}
#[test]
fn uint256_strict_add_works() {
let a = Uint256::from(5u32);
let b = Uint256::from(3u32);
assert_eq!(a.strict_add(b), Uint256::from(8u32));
assert_eq!(b.strict_add(a), Uint256::from(8u32));
}
#[test]
#[should_panic(expected = "attempt to add with overflow")]
fn uint256_strict_add_panics_on_overflow() {
let a = Uint256::MAX;
let b = Uint256::ONE;
let _ = a.strict_add(b);
}
#[test]
fn uint256_strict_sub_works() {
let a = Uint256::from(5u32);
let b = Uint256::from(3u32);
assert_eq!(a.strict_sub(b), Uint256::from(2u32));
}
#[test]
#[should_panic(expected = "attempt to subtract with overflow")]
fn uint256_strict_sub_panics_on_overflow() {
let a = Uint256::ZERO;
let b = Uint256::ONE;
let _ = a.strict_sub(b);
}
#[test]
fn uint256_abs_diff_works() {
let a = Uint256::from(42u32);
let b = Uint256::from(5u32);
let expected = Uint256::from(37u32);
assert_eq!(a.abs_diff(b), expected);
assert_eq!(b.abs_diff(a), expected);
}
#[test]
fn uint256_partial_eq() {
let test_cases = [(1, 1, true), (42, 42, true), (42, 24, false), (0, 0, true)]
.into_iter()
.map(|(lhs, rhs, expected): (u64, u64, bool)| {
(Uint256::from(lhs), Uint256::from(rhs), expected)
});
#[allow(clippy::op_ref)]
for (lhs, rhs, expected) in test_cases {
assert_eq!(lhs == rhs, expected);
assert_eq!(&lhs == rhs, expected);
assert_eq!(lhs == &rhs, expected);
assert_eq!(&lhs == &rhs, expected);
}
}
#[test]
fn mul_floor_works_with_zero() {
let fraction = (Uint256::zero(), Uint256::from(21u32));
let res = Uint256::from(123456u32).mul_floor(fraction);
assert_eq!(Uint256::zero(), res)
}
#[test]
fn mul_floor_does_nothing_with_one() {
let fraction = (Uint256::one(), Uint256::one());
let res = Uint256::from(123456u32).mul_floor(fraction);
assert_eq!(Uint256::from(123456u32), res)
}
#[test]
fn mul_floor_rounds_down_with_normal_case() {
let fraction = (Uint256::from(8u128), Uint256::from(21u128));
let res = Uint256::from(123456u32).mul_floor(fraction); assert_eq!(Uint256::from(47030u32), res)
}
#[test]
fn mul_floor_does_not_round_on_even_divide() {
let fraction = (2u128, 5u128);
let res = Uint256::from(25u32).mul_floor(fraction);
assert_eq!(Uint256::from(10u32), res)
}
#[test]
fn mul_floor_works_when_operation_temporarily_takes_above_max() {
let fraction = (8u128, 21u128);
let res = Uint256::MAX.mul_floor(fraction); assert_eq!(
Uint256::from_str(
"44111272090406169685169899050928726801245708444053548205507651050633573196165"
)
.unwrap(),
res
)
}
#[test]
fn mul_floor_works_with_decimal() {
let decimal = Decimal::from_ratio(8u128, 21u128);
let res = Uint256::from(123456u32).mul_floor(decimal); assert_eq!(Uint256::from(47030u32), res)
}
#[test]
fn mul_floor_works_with_decimal256() {
let decimal = Decimal256::from_ratio(8u128, 21u128);
let res = Uint256::from(123456u32).mul_floor(decimal); assert_eq!(Uint256::from(47030u32), res)
}
#[test]
#[should_panic(expected = "ConversionOverflowError")]
fn mul_floor_panics_on_overflow() {
let fraction = (21u128, 8u128);
_ = Uint256::MAX.mul_floor(fraction);
}
#[test]
fn checked_mul_floor_does_not_panic_on_overflow() {
let fraction = (21u128, 8u128);
assert_eq!(
Uint256::MAX.checked_mul_floor(fraction),
Err(ConversionOverflow(ConversionOverflowError {
source_type: "Uint512",
target_type: "Uint256",
value:
"303954234247955012986873835647805758114833709747306480603576158020771965304829"
.to_string()
})),
);
}
#[test]
#[should_panic(expected = "DivideByZeroError")]
fn mul_floor_panics_on_zero_div() {
let fraction = (21u128, 0u128);
_ = Uint256::from(123456u32).mul_floor(fraction);
}
#[test]
fn checked_mul_floor_does_not_panic_on_zero_div() {
let fraction = (21u128, 0u128);
assert_eq!(
Uint256::from(123456u32).checked_mul_floor(fraction),
Err(DivideByZero(DivideByZeroError {
operand: "2592576".to_string()
})),
);
}
#[test]
fn mul_ceil_works_with_zero() {
let fraction = (Uint256::zero(), Uint256::from(21u32));
let res = Uint256::from(123456u32).mul_ceil(fraction);
assert_eq!(Uint256::zero(), res)
}
#[test]
fn mul_ceil_does_nothing_with_one() {
let fraction = (Uint256::one(), Uint256::one());
let res = Uint256::from(123456u32).mul_ceil(fraction);
assert_eq!(Uint256::from(123456u32), res)
}
#[test]
fn mul_ceil_rounds_up_with_normal_case() {
let fraction = (8u128, 21u128);
let res = Uint256::from(123456u32).mul_ceil(fraction); assert_eq!(Uint256::from(47031u32), res)
}
#[test]
fn mul_ceil_does_not_round_on_even_divide() {
let fraction = (2u128, 5u128);
let res = Uint256::from(25u32).mul_ceil(fraction);
assert_eq!(Uint256::from(10u32), res)
}
#[test]
fn mul_ceil_works_when_operation_temporarily_takes_above_max() {
let fraction = (8u128, 21u128);
let res = Uint256::MAX.mul_ceil(fraction); assert_eq!(
Uint256::from_str(
"44111272090406169685169899050928726801245708444053548205507651050633573196166"
)
.unwrap(),
res
)
}
#[test]
fn mul_ceil_works_with_decimal() {
let decimal = Decimal::from_ratio(8u128, 21u128);
let res = Uint256::from(123456u32).mul_ceil(decimal); assert_eq!(Uint256::from(47031u32), res)
}
#[test]
fn mul_ceil_works_with_decimal256() {
let decimal = Decimal256::from_ratio(8u128, 21u128);
let res = Uint256::from(123456u32).mul_ceil(decimal); assert_eq!(Uint256::from(47031u32), res)
}
#[test]
#[should_panic(expected = "ConversionOverflowError")]
fn mul_ceil_panics_on_overflow() {
let fraction = (21u128, 8u128);
_ = Uint256::MAX.mul_ceil(fraction);
}
#[test]
fn checked_mul_ceil_does_not_panic_on_overflow() {
let fraction = (21u128, 8u128);
assert_eq!(
Uint256::MAX.checked_mul_ceil(fraction),
Err(ConversionOverflow(ConversionOverflowError {
source_type: "Uint512",
target_type: "Uint256",
value:
"303954234247955012986873835647805758114833709747306480603576158020771965304829" .to_string()
})),
);
}
#[test]
#[should_panic(expected = "DivideByZeroError")]
fn mul_ceil_panics_on_zero_div() {
let fraction = (21u128, 0u128);
_ = Uint256::from(123456u32).mul_ceil(fraction);
}
#[test]
fn checked_mul_ceil_does_not_panic_on_zero_div() {
let fraction = (21u128, 0u128);
assert_eq!(
Uint256::from(123456u32).checked_mul_ceil(fraction),
Err(DivideByZero(DivideByZeroError {
operand: "2592576".to_string()
})),
);
}
#[test]
#[should_panic(expected = "DivideByZeroError")]
fn div_floor_raises_with_zero() {
let fraction = (Uint256::zero(), Uint256::from(21u32));
_ = Uint256::from(123456u128).div_floor(fraction);
}
#[test]
fn div_floor_does_nothing_with_one() {
let fraction = (Uint256::one(), Uint256::one());
let res = Uint256::from(123456u128).div_floor(fraction);
assert_eq!(Uint256::from(123456u128), res)
}
#[test]
fn div_floor_rounds_down_with_normal_case() {
let fraction = (5u128, 21u128);
let res = Uint256::from(123456u128).div_floor(fraction); assert_eq!(Uint256::from(518515u128), res)
}
#[test]
fn div_floor_does_not_round_on_even_divide() {
let fraction = (5u128, 2u128);
let res = Uint256::from(25u128).div_floor(fraction);
assert_eq!(Uint256::from(10u128), res)
}
#[test]
fn div_floor_works_when_operation_temporarily_takes_above_max() {
let fraction = (21u128, 8u128);
let res = Uint256::MAX.div_floor(fraction); assert_eq!(
Uint256::from_str(
"44111272090406169685169899050928726801245708444053548205507651050633573196165"
)
.unwrap(),
res
)
}
#[test]
fn div_floor_works_with_decimal() {
let decimal = Decimal::from_ratio(21u128, 8u128);
let res = Uint256::from(123456u128).div_floor(decimal); assert_eq!(Uint256::from(47030u128), res)
}
#[test]
fn div_floor_works_with_decimal_evenly() {
let res = Uint256::from(60u128).div_floor(Decimal::from_atomics(6u128, 0).unwrap());
assert_eq!(res, Uint256::from(10u128));
}
#[test]
#[should_panic(expected = "ConversionOverflowError")]
fn div_floor_panics_on_overflow() {
let fraction = (8u128, 21u128);
_ = Uint256::MAX.div_floor(fraction);
}
#[test]
fn div_floor_does_not_panic_on_overflow() {
let fraction = (8u128, 21u128);
assert_eq!(
Uint256::MAX.checked_div_floor(fraction),
Err(ConversionOverflow(ConversionOverflowError {
source_type: "Uint512",
target_type: "Uint256",
value:
"303954234247955012986873835647805758114833709747306480603576158020771965304829"
.to_string()
})),
);
}
#[test]
#[should_panic(expected = "DivideByZeroError")]
fn div_ceil_raises_with_zero() {
let fraction = (Uint256::zero(), Uint256::from(21u128));
_ = Uint256::from(123456u128).div_ceil(fraction);
}
#[test]
fn div_ceil_does_nothing_with_one() {
let fraction = (Uint256::one(), Uint256::one());
let res = Uint256::from(123456u128).div_ceil(fraction);
assert_eq!(Uint256::from(123456u128), res)
}
#[test]
fn div_ceil_rounds_up_with_normal_case() {
let fraction = (5u128, 21u128);
let res = Uint256::from(123456u128).div_ceil(fraction); assert_eq!(Uint256::from(518516u128), res)
}
#[test]
fn div_ceil_does_not_round_on_even_divide() {
let fraction = (5u128, 2u128);
let res = Uint256::from(25u128).div_ceil(fraction);
assert_eq!(Uint256::from(10u128), res)
}
#[test]
fn div_ceil_works_when_operation_temporarily_takes_above_max() {
let fraction = (21u128, 8u128);
let res = Uint256::MAX.div_ceil(fraction); assert_eq!(
Uint256::from_str(
"44111272090406169685169899050928726801245708444053548205507651050633573196166"
)
.unwrap(),
res
)
}
#[test]
fn div_ceil_works_with_decimal() {
let decimal = Decimal::from_ratio(21u128, 8u128);
let res = Uint256::from(123456u128).div_ceil(decimal); assert_eq!(Uint256::from(47031u128), res)
}
#[test]
fn div_ceil_works_with_decimal_evenly() {
let res = Uint256::from(60u128).div_ceil(Decimal::from_atomics(6u128, 0).unwrap());
assert_eq!(res, Uint256::from(10u128));
}
#[test]
#[should_panic(expected = "ConversionOverflowError")]
fn div_ceil_panics_on_overflow() {
let fraction = (8u128, 21u128);
_ = Uint256::MAX.div_ceil(fraction);
}
#[test]
fn div_ceil_does_not_panic_on_overflow() {
let fraction = (8u128, 21u128);
assert_eq!(
Uint256::MAX.checked_div_ceil(fraction),
Err(ConversionOverflow(ConversionOverflowError {
source_type: "Uint512",
target_type: "Uint256",
value:
"303954234247955012986873835647805758114833709747306480603576158020771965304829"
.to_string() })),
);
}
}