use core::cmp::Ordering;
use core::fmt::{self, Write};
use core::ops::{
Add, AddAssign, Div, DivAssign, Mul, MulAssign, Neg, Rem, RemAssign, 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 thiserror::Error;
use crate::errors::{
CheckedFromRatioError, CheckedMultiplyRatioError, DivideByZeroError, OverflowError,
OverflowOperation, RoundDownOverflowError, RoundUpOverflowError, StdError,
};
use crate::{forward_ref_partial_eq, Decimal, Decimal256, Int512, SignedDecimal};
use super::Fraction;
use super::Int256;
#[derive(Copy, Clone, Default, PartialEq, Eq, PartialOrd, Ord, JsonSchema)]
pub struct SignedDecimal256(#[schemars(with = "String")] Int256);
forward_ref_partial_eq!(SignedDecimal256, SignedDecimal256);
#[derive(Error, Debug, PartialEq, Eq)]
#[error("SignedDecimal256 range exceeded")]
pub struct SignedDecimal256RangeExceeded;
impl SignedDecimal256 {
const DECIMAL_FRACTIONAL: Int256 = Int256::from_i128(1_000_000_000_000_000_000);
const DECIMAL_FRACTIONAL_SQUARED: Int256 = Int256::from_i128(1_000_000_000_000_000_000_000_000_000_000_000_000);
pub const DECIMAL_PLACES: u32 = 18; pub const MAX: Self = Self(Int256::MAX);
pub const MIN: Self = Self(Int256::MIN);
pub const fn new(value: Int256) -> Self {
Self(value)
}
pub const fn raw(value: i128) -> Self {
Self(Int256::from_i128(value))
}
#[inline]
pub const fn one() -> Self {
Self(Self::DECIMAL_FRACTIONAL)
}
#[inline]
pub const fn negative_one() -> Self {
Self(Int256::from_i128(-1_000_000_000_000_000_000))
}
#[inline]
pub const fn zero() -> Self {
Self(Int256::zero())
}
pub fn percent(x: i64) -> Self {
Self(((x as i128) * 10_000_000_000_000_000).into())
}
pub fn permille(x: i64) -> Self {
Self(((x as i128) * 1_000_000_000_000_000).into())
}
pub fn bps(x: i64) -> Self {
Self(((x as i128) * 100_000_000_000_000).into())
}
pub fn from_atomics(
atomics: impl Into<Int256>,
decimal_places: u32,
) -> Result<Self, SignedDecimal256RangeExceeded> {
let atomics = atomics.into();
let ten = Int256::from(10u64);
Ok(match decimal_places.cmp(&(Self::DECIMAL_PLACES)) {
Ordering::Less => {
let digits = (Self::DECIMAL_PLACES) - decimal_places; let factor = ten.checked_pow(digits).unwrap(); Self(
atomics
.checked_mul(factor)
.map_err(|_| SignedDecimal256RangeExceeded)?,
)
}
Ordering::Equal => Self(atomics),
Ordering::Greater => {
let digits = decimal_places - (Self::DECIMAL_PLACES); if let Ok(factor) = ten.checked_pow(digits) {
Self(atomics.checked_div(factor).unwrap()) } else {
Self(Int256::zero())
}
}
})
}
pub fn from_ratio(numerator: impl Into<Int256>, denominator: impl Into<Int256>) -> Self {
match SignedDecimal256::checked_from_ratio(numerator, denominator) {
Ok(value) => value,
Err(CheckedFromRatioError::DivideByZero) => {
panic!("Denominator must not be zero")
}
Err(CheckedFromRatioError::Overflow) => panic!("Multiplication overflow"),
}
}
pub fn checked_from_ratio(
numerator: impl Into<Int256>,
denominator: impl Into<Int256>,
) -> Result<Self, CheckedFromRatioError> {
let numerator: Int256 = numerator.into();
let denominator: Int256 = denominator.into();
match numerator.checked_multiply_ratio(Self::DECIMAL_FRACTIONAL, denominator) {
Ok(ratio) => {
Ok(SignedDecimal256(ratio))
}
Err(CheckedMultiplyRatioError::Overflow) => Err(CheckedFromRatioError::Overflow),
Err(CheckedMultiplyRatioError::DivideByZero) => {
Err(CheckedFromRatioError::DivideByZero)
}
}
}
#[must_use]
pub const fn is_zero(&self) -> bool {
self.0.is_zero()
}
#[must_use]
pub const fn is_negative(&self) -> bool {
self.0.is_negative()
}
#[must_use]
#[inline]
pub const fn atomics(&self) -> Int256 {
self.0
}
#[must_use]
#[inline]
pub const fn decimal_places(&self) -> u32 {
Self::DECIMAL_PLACES
}
#[must_use = "this returns the result of the operation, without modifying the original"]
pub fn trunc(&self) -> Self {
Self((self.0 / Self::DECIMAL_FRACTIONAL) * Self::DECIMAL_FRACTIONAL)
}
#[must_use = "this returns the result of the operation, without modifying the original"]
pub fn floor(&self) -> Self {
match self.checked_floor() {
Ok(value) => value,
Err(_) => panic!("attempt to floor with overflow"),
}
}
pub fn checked_floor(&self) -> Result<Self, RoundDownOverflowError> {
if self.is_negative() {
let truncated = self.trunc();
if truncated != self {
truncated
.checked_sub(SignedDecimal256::one())
.map_err(|_| RoundDownOverflowError)
} else {
Ok(truncated)
}
} else {
Ok(self.trunc())
}
}
#[must_use = "this returns the result of the operation, without modifying the original"]
pub fn ceil(&self) -> Self {
match self.checked_ceil() {
Ok(value) => value,
Err(_) => panic!("attempt to ceil with overflow"),
}
}
pub fn checked_ceil(&self) -> Result<Self, RoundUpOverflowError> {
let floor = self.floor();
if floor == self {
Ok(floor)
} else {
floor
.checked_add(SignedDecimal256::one())
.map_err(|_| RoundUpOverflowError)
}
}
pub fn checked_add(self, other: Self) -> Result<Self, OverflowError> {
self.0
.checked_add(other.0)
.map(Self)
.map_err(|_| OverflowError::new(OverflowOperation::Add, self, other))
}
pub fn checked_sub(self, other: Self) -> Result<Self, OverflowError> {
self.0
.checked_sub(other.0)
.map(Self)
.map_err(|_| OverflowError::new(OverflowOperation::Sub, self, other))
}
pub fn checked_mul(self, other: Self) -> Result<Self, OverflowError> {
let result_as_int512 =
self.numerator().full_mul(other.numerator()) / Int512::from(Self::DECIMAL_FRACTIONAL);
result_as_int512
.try_into()
.map(Self)
.map_err(|_| OverflowError {
operation: OverflowOperation::Mul,
operand1: self.to_string(),
operand2: other.to_string(),
})
}
#[must_use = "this returns the result of the operation, without modifying the original"]
pub fn pow(self, exp: u32) -> Self {
match self.checked_pow(exp) {
Ok(value) => value,
Err(_) => panic!("Multiplication overflow"),
}
}
pub fn checked_pow(self, exp: u32) -> Result<Self, OverflowError> {
fn inner(mut x: SignedDecimal256, mut n: u32) -> Result<SignedDecimal256, OverflowError> {
if n == 0 {
return Ok(SignedDecimal256::one());
}
let mut y = SignedDecimal256::one();
while n > 1 {
if n % 2 == 0 {
x = x.checked_mul(x)?;
n /= 2;
} else {
y = x.checked_mul(y)?;
x = x.checked_mul(x)?;
n = (n - 1) / 2;
}
}
Ok(x * y)
}
inner(self, exp).map_err(|_| OverflowError {
operation: OverflowOperation::Pow,
operand1: self.to_string(),
operand2: exp.to_string(),
})
}
pub fn checked_div(self, other: Self) -> Result<Self, CheckedFromRatioError> {
SignedDecimal256::checked_from_ratio(self.numerator(), other.numerator())
}
pub fn checked_rem(self, other: Self) -> Result<Self, DivideByZeroError> {
self.0
.checked_rem(other.0)
.map(Self)
.map_err(|_| DivideByZeroError::new(self))
}
#[must_use = "this returns the result of the operation, without modifying the original"]
pub const fn abs_diff(self, other: Self) -> Decimal256 {
Decimal256::new(self.0.abs_diff(other.0))
}
#[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 {
match self.checked_mul(other) {
Ok(value) => value,
Err(_) => {
if self.is_negative() == other.is_negative() {
Self::MAX
} else {
Self::MIN
}
}
}
}
#[must_use = "this returns the result of the operation, without modifying the original"]
pub fn saturating_pow(self, exp: u32) -> Self {
match self.checked_pow(exp) {
Ok(value) => value,
Err(_) => {
if self.is_negative() && exp % 2 == 1 {
Self::MIN
} else {
Self::MAX
}
}
}
}
#[must_use = "this returns the result of the operation, without modifying the original"]
pub fn to_int_floor(self) -> Int256 {
if self.is_negative() {
let x = self.0;
let y = Self::DECIMAL_FRACTIONAL;
-Int256::one() - ((-Int256::one() - x) / y)
} else {
self.to_int_trunc()
}
}
#[must_use = "this returns the result of the operation, without modifying the original"]
pub fn to_int_trunc(self) -> Int256 {
self.0 / Self::DECIMAL_FRACTIONAL
}
#[must_use = "this returns the result of the operation, without modifying the original"]
pub fn to_int_ceil(self) -> Int256 {
if self.is_negative() {
self.to_int_trunc()
} else {
let x = self.0;
let y = Self::DECIMAL_FRACTIONAL;
if x.is_zero() {
Int256::zero()
} else {
Int256::one() + ((x - Int256::one()) / y)
}
}
}
}
impl Fraction<Int256> for SignedDecimal256 {
#[inline]
fn numerator(&self) -> Int256 {
self.0
}
#[inline]
fn denominator(&self) -> Int256 {
Self::DECIMAL_FRACTIONAL
}
fn inv(&self) -> Option<Self> {
if self.is_zero() {
None
} else {
Some(SignedDecimal256(Self::DECIMAL_FRACTIONAL_SQUARED / self.0))
}
}
}
impl Neg for SignedDecimal256 {
type Output = Self;
fn neg(self) -> Self::Output {
Self(-self.0)
}
}
impl From<SignedDecimal> for SignedDecimal256 {
fn from(value: SignedDecimal) -> Self {
Self::new(value.atomics().into())
}
}
impl From<Decimal> for SignedDecimal256 {
fn from(value: Decimal) -> Self {
Self::new(value.atomics().into())
}
}
impl TryFrom<Decimal256> for SignedDecimal256 {
type Error = SignedDecimal256RangeExceeded;
fn try_from(value: Decimal256) -> Result<Self, Self::Error> {
value
.atomics()
.try_into()
.map(SignedDecimal256)
.map_err(|_| SignedDecimal256RangeExceeded)
}
}
impl FromStr for SignedDecimal256 {
type Err = StdError;
fn from_str(input: &str) -> Result<Self, Self::Err> {
let mut parts_iter = input.split('.');
let whole_part = parts_iter.next().unwrap(); let is_neg = whole_part.starts_with('-');
let whole = whole_part
.parse::<Int256>()
.map_err(|_| StdError::generic_err("Error parsing whole"))?;
let mut atomics = whole
.checked_mul(Self::DECIMAL_FRACTIONAL)
.map_err(|_| StdError::generic_err("Value too big"))?;
if let Some(fractional_part) = parts_iter.next() {
let fractional = fractional_part
.parse::<u64>() .map_err(|_| StdError::generic_err("Error parsing fractional"))?;
let exp = (Self::DECIMAL_PLACES.checked_sub(fractional_part.len() as u32)).ok_or_else(
|| {
StdError::generic_err(format!(
"Cannot parse more than {} fractional digits",
Self::DECIMAL_PLACES
))
},
)?;
debug_assert!(exp <= Self::DECIMAL_PLACES);
let fractional_factor = Int256::from(10i128.pow(exp));
let fractional_part = Int256::from(fractional)
.checked_mul(fractional_factor)
.unwrap();
atomics = if is_neg {
atomics.checked_sub(fractional_part)
} else {
atomics.checked_add(fractional_part)
}
.map_err(|_| StdError::generic_err("Value too big"))?;
}
if parts_iter.next().is_some() {
return Err(StdError::generic_err("Unexpected number of dots"));
}
Ok(SignedDecimal256(atomics))
}
}
impl fmt::Display for SignedDecimal256 {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
let whole = (self.0) / Self::DECIMAL_FRACTIONAL;
let fractional = (self.0).checked_rem(Self::DECIMAL_FRACTIONAL).unwrap();
if fractional.is_zero() {
write!(f, "{whole}")
} else {
let fractional_string = format!(
"{:0>padding$}",
fractional.abs(), padding = Self::DECIMAL_PLACES as usize
);
if self.is_negative() {
f.write_char('-')?;
}
write!(
f,
"{whole}.{fractional}",
whole = whole.abs(),
fractional = fractional_string.trim_end_matches('0')
)
}
}
}
impl fmt::Debug for SignedDecimal256 {
fn fmt(&self, f: &mut fmt::Formatter) -> fmt::Result {
write!(f, "SignedDecimal256({self})")
}
}
impl Add for SignedDecimal256 {
type Output = Self;
fn add(self, other: Self) -> Self {
SignedDecimal256(self.0 + other.0)
}
}
forward_ref_binop!(impl Add, add for SignedDecimal256, SignedDecimal256);
impl AddAssign for SignedDecimal256 {
fn add_assign(&mut self, rhs: SignedDecimal256) {
*self = *self + rhs;
}
}
forward_ref_op_assign!(impl AddAssign, add_assign for SignedDecimal256, SignedDecimal256);
impl Sub for SignedDecimal256 {
type Output = Self;
fn sub(self, other: Self) -> Self {
SignedDecimal256(self.0 - other.0)
}
}
forward_ref_binop!(impl Sub, sub for SignedDecimal256, SignedDecimal256);
impl SubAssign for SignedDecimal256 {
fn sub_assign(&mut self, rhs: SignedDecimal256) {
*self = *self - rhs;
}
}
forward_ref_op_assign!(impl SubAssign, sub_assign for SignedDecimal256, SignedDecimal256);
impl Mul for SignedDecimal256 {
type Output = Self;
#[allow(clippy::suspicious_arithmetic_impl)]
fn mul(self, other: Self) -> Self {
let result_as_int512 =
self.numerator().full_mul(other.numerator()) / Int512::from(Self::DECIMAL_FRACTIONAL);
match result_as_int512.try_into() {
Ok(result) => Self(result),
Err(_) => panic!("attempt to multiply with overflow"),
}
}
}
forward_ref_binop!(impl Mul, mul for SignedDecimal256, SignedDecimal256);
impl MulAssign for SignedDecimal256 {
fn mul_assign(&mut self, rhs: SignedDecimal256) {
*self = *self * rhs;
}
}
forward_ref_op_assign!(impl MulAssign, mul_assign for SignedDecimal256, SignedDecimal256);
impl Div for SignedDecimal256 {
type Output = Self;
fn div(self, other: Self) -> Self {
match SignedDecimal256::checked_from_ratio(self.numerator(), other.numerator()) {
Ok(ratio) => ratio,
Err(CheckedFromRatioError::DivideByZero) => {
panic!("Division failed - denominator must not be zero")
}
Err(CheckedFromRatioError::Overflow) => {
panic!("Division failed - multiplication overflow")
}
}
}
}
forward_ref_binop!(impl Div, div for SignedDecimal256, SignedDecimal256);
impl DivAssign for SignedDecimal256 {
fn div_assign(&mut self, rhs: SignedDecimal256) {
*self = *self / rhs;
}
}
forward_ref_op_assign!(impl DivAssign, div_assign for SignedDecimal256, SignedDecimal256);
impl Div<Int256> for SignedDecimal256 {
type Output = Self;
fn div(self, rhs: Int256) -> Self::Output {
SignedDecimal256(self.0 / rhs)
}
}
impl DivAssign<Int256> for SignedDecimal256 {
fn div_assign(&mut self, rhs: Int256) {
self.0 /= rhs;
}
}
impl Rem for SignedDecimal256 {
type Output = Self;
#[inline]
fn rem(self, rhs: Self) -> Self {
Self(self.0.rem(rhs.0))
}
}
forward_ref_binop!(impl Rem, rem for SignedDecimal256, SignedDecimal256);
impl RemAssign<SignedDecimal256> for SignedDecimal256 {
fn rem_assign(&mut self, rhs: SignedDecimal256) {
*self = *self % rhs;
}
}
forward_ref_op_assign!(impl RemAssign, rem_assign for SignedDecimal256, SignedDecimal256);
impl<A> core::iter::Sum<A> for SignedDecimal256
where
Self: Add<A, Output = Self>,
{
fn sum<I: Iterator<Item = A>>(iter: I) -> Self {
iter.fold(Self::zero(), Add::add)
}
}
impl Serialize for SignedDecimal256 {
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 SignedDecimal256 {
fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
where
D: Deserializer<'de>,
{
deserializer.deserialize_str(SignedDecimal256Visitor)
}
}
struct SignedDecimal256Visitor;
impl<'de> de::Visitor<'de> for SignedDecimal256Visitor {
type Value = SignedDecimal256;
fn expecting(&self, formatter: &mut fmt::Formatter) -> fmt::Result {
formatter.write_str("string-encoded decimal")
}
fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
where
E: de::Error,
{
match SignedDecimal256::from_str(v) {
Ok(d) => Ok(d),
Err(e) => Err(E::custom(format!("Error parsing decimal '{v}': {e}"))),
}
}
}
#[cfg(test)]
mod tests {
use super::*;
use crate::{from_json, to_json_vec};
use schemars::schema_for;
fn dec(input: &str) -> SignedDecimal256 {
SignedDecimal256::from_str(input).unwrap()
}
#[test]
fn signed_decimal_256_new() {
let expected = Int256::from(300i128);
assert_eq!(SignedDecimal256::new(expected).0, expected);
let expected = Int256::from(-300i128);
assert_eq!(SignedDecimal256::new(expected).0, expected);
}
#[test]
fn signed_decimal_256_raw() {
let value = 300i128;
assert_eq!(SignedDecimal256::raw(value).0, Int256::from(value));
let value = -300i128;
assert_eq!(SignedDecimal256::raw(value).0, Int256::from(value));
}
#[test]
fn signed_decimal_256_one() {
let value = SignedDecimal256::one();
assert_eq!(value.0, SignedDecimal256::DECIMAL_FRACTIONAL);
}
#[test]
fn signed_decimal_256_zero() {
let value = SignedDecimal256::zero();
assert!(value.0.is_zero());
}
#[test]
fn signed_decimal_256_percent() {
let value = SignedDecimal256::percent(50);
assert_eq!(
value.0,
SignedDecimal256::DECIMAL_FRACTIONAL / Int256::from(2u8)
);
let value = SignedDecimal256::percent(-50);
assert_eq!(
value.0,
SignedDecimal256::DECIMAL_FRACTIONAL / Int256::from(-2i8)
);
}
#[test]
fn signed_decimal_256_permille() {
let value = SignedDecimal256::permille(125);
assert_eq!(
value.0,
SignedDecimal256::DECIMAL_FRACTIONAL / Int256::from(8u8)
);
let value = SignedDecimal256::permille(-125);
assert_eq!(
value.0,
SignedDecimal256::DECIMAL_FRACTIONAL / Int256::from(-8i8)
);
}
#[test]
fn signed_decimal_256_bps() {
let value = SignedDecimal256::bps(125);
assert_eq!(
value.0,
SignedDecimal256::DECIMAL_FRACTIONAL / Int256::from(80u8)
);
let value = SignedDecimal256::bps(-125);
assert_eq!(
value.0,
SignedDecimal256::DECIMAL_FRACTIONAL / Int256::from(-80i8)
);
}
#[test]
fn signed_decimal_256_from_atomics_works() {
let one = SignedDecimal256::one();
let two = one + one;
let neg_one = SignedDecimal256::negative_one();
assert_eq!(SignedDecimal256::from_atomics(1i128, 0).unwrap(), one);
assert_eq!(SignedDecimal256::from_atomics(10i128, 1).unwrap(), one);
assert_eq!(SignedDecimal256::from_atomics(100i128, 2).unwrap(), one);
assert_eq!(SignedDecimal256::from_atomics(1000i128, 3).unwrap(), one);
assert_eq!(
SignedDecimal256::from_atomics(1000000000000000000i128, 18).unwrap(),
one
);
assert_eq!(
SignedDecimal256::from_atomics(10000000000000000000i128, 19).unwrap(),
one
);
assert_eq!(
SignedDecimal256::from_atomics(100000000000000000000i128, 20).unwrap(),
one
);
assert_eq!(SignedDecimal256::from_atomics(2i128, 0).unwrap(), two);
assert_eq!(SignedDecimal256::from_atomics(20i128, 1).unwrap(), two);
assert_eq!(SignedDecimal256::from_atomics(200i128, 2).unwrap(), two);
assert_eq!(SignedDecimal256::from_atomics(2000i128, 3).unwrap(), two);
assert_eq!(
SignedDecimal256::from_atomics(2000000000000000000i128, 18).unwrap(),
two
);
assert_eq!(
SignedDecimal256::from_atomics(20000000000000000000i128, 19).unwrap(),
two
);
assert_eq!(
SignedDecimal256::from_atomics(200000000000000000000i128, 20).unwrap(),
two
);
assert_eq!(SignedDecimal256::from_atomics(-1i128, 0).unwrap(), neg_one);
assert_eq!(SignedDecimal256::from_atomics(-10i128, 1).unwrap(), neg_one);
assert_eq!(
SignedDecimal256::from_atomics(-100000000000000000000i128, 20).unwrap(),
neg_one
);
assert_eq!(
SignedDecimal256::from_atomics(4321i128, 20).unwrap(),
SignedDecimal256::from_str("0.000000000000000043").unwrap()
);
assert_eq!(
SignedDecimal256::from_atomics(-4321i128, 20).unwrap(),
SignedDecimal256::from_str("-0.000000000000000043").unwrap()
);
assert_eq!(
SignedDecimal256::from_atomics(6789i128, 20).unwrap(),
SignedDecimal256::from_str("0.000000000000000067").unwrap()
);
assert_eq!(
SignedDecimal256::from_atomics(i128::MAX, 38).unwrap(),
SignedDecimal256::from_str("1.701411834604692317").unwrap()
);
assert_eq!(
SignedDecimal256::from_atomics(i128::MAX, 39).unwrap(),
SignedDecimal256::from_str("0.170141183460469231").unwrap()
);
assert_eq!(
SignedDecimal256::from_atomics(i128::MAX, 45).unwrap(),
SignedDecimal256::from_str("0.000000170141183460").unwrap()
);
assert_eq!(
SignedDecimal256::from_atomics(i128::MAX, 51).unwrap(),
SignedDecimal256::from_str("0.000000000000170141").unwrap()
);
assert_eq!(
SignedDecimal256::from_atomics(i128::MAX, 56).unwrap(),
SignedDecimal256::from_str("0.000000000000000001").unwrap()
);
assert_eq!(
SignedDecimal256::from_atomics(i128::MAX, 57).unwrap(),
SignedDecimal256::from_str("0.000000000000000000").unwrap()
);
assert_eq!(
SignedDecimal256::from_atomics(i128::MAX, u32::MAX).unwrap(),
SignedDecimal256::from_str("0.000000000000000000").unwrap()
);
let max = SignedDecimal256::MAX;
assert_eq!(
SignedDecimal256::from_atomics(max.atomics(), max.decimal_places()).unwrap(),
max
);
let min = SignedDecimal256::MIN;
assert_eq!(
SignedDecimal256::from_atomics(min.atomics(), min.decimal_places()).unwrap(),
min
);
let result = SignedDecimal256::from_atomics(Int256::MAX, 17);
assert_eq!(result.unwrap_err(), SignedDecimal256RangeExceeded);
}
#[test]
fn signed_decimal_256_from_ratio_works() {
assert_eq!(
SignedDecimal256::from_ratio(1i128, 1i128),
SignedDecimal256::one()
);
assert_eq!(
SignedDecimal256::from_ratio(53i128, 53i128),
SignedDecimal256::one()
);
assert_eq!(
SignedDecimal256::from_ratio(125i128, 125i128),
SignedDecimal256::one()
);
assert_eq!(
SignedDecimal256::from_ratio(-1i128, 1i128),
SignedDecimal256::negative_one()
);
assert_eq!(
SignedDecimal256::from_ratio(-53i128, 53i128),
SignedDecimal256::negative_one()
);
assert_eq!(
SignedDecimal256::from_ratio(125i128, -125i128),
SignedDecimal256::negative_one()
);
assert_eq!(
SignedDecimal256::from_ratio(3i128, 2i128),
SignedDecimal256::percent(150)
);
assert_eq!(
SignedDecimal256::from_ratio(150i128, 100i128),
SignedDecimal256::percent(150)
);
assert_eq!(
SignedDecimal256::from_ratio(333i128, 222i128),
SignedDecimal256::percent(150)
);
assert_eq!(
SignedDecimal256::from_ratio(1i64, 8i64),
SignedDecimal256::permille(125)
);
assert_eq!(
SignedDecimal256::from_ratio(125i64, 1000i64),
SignedDecimal256::permille(125)
);
assert_eq!(
SignedDecimal256::from_ratio(-1i64, 8i64),
SignedDecimal256::permille(-125)
);
assert_eq!(
SignedDecimal256::from_ratio(125i64, -1000i64),
SignedDecimal256::permille(-125)
);
assert_eq!(
SignedDecimal256::from_ratio(1i64, 3i64),
SignedDecimal256(Int256::from(333_333_333_333_333_333i128))
);
assert_eq!(
SignedDecimal256::from_ratio(2i64, 3i64),
SignedDecimal256(Int256::from(666_666_666_666_666_666i128))
);
assert_eq!(
SignedDecimal256::from_ratio(0i128, i128::MAX),
SignedDecimal256::zero()
);
assert_eq!(
SignedDecimal256::from_ratio(i128::MAX, i128::MAX),
SignedDecimal256::one()
);
assert_eq!(
SignedDecimal256::from_ratio(170141183460469231731i128, 1i128),
SignedDecimal256::from_str("170141183460469231731").unwrap()
);
}
#[test]
#[should_panic(expected = "Denominator must not be zero")]
fn signed_decimal_256_from_ratio_panics_for_zero_denominator() {
SignedDecimal256::from_ratio(1i128, 0i128);
}
#[test]
#[should_panic(expected = "Multiplication overflow")]
fn signed_decimal_256_from_ratio_panics_for_mul_overflow() {
SignedDecimal256::from_ratio(Int256::MAX, 1i128);
}
#[test]
fn signed_decimal_256_checked_from_ratio_does_not_panic() {
assert_eq!(
SignedDecimal256::checked_from_ratio(1i128, 0i128),
Err(CheckedFromRatioError::DivideByZero)
);
assert_eq!(
SignedDecimal256::checked_from_ratio(Int256::MAX, 1i128),
Err(CheckedFromRatioError::Overflow)
);
}
#[test]
fn signed_decimal_256_implements_fraction() {
let fraction = SignedDecimal256::from_str("1234.567").unwrap();
assert_eq!(
fraction.numerator(),
Int256::from(1_234_567_000_000_000_000_000i128)
);
assert_eq!(
fraction.denominator(),
Int256::from(1_000_000_000_000_000_000i128)
);
let fraction = SignedDecimal256::from_str("-1234.567").unwrap();
assert_eq!(
fraction.numerator(),
Int256::from(-1_234_567_000_000_000_000_000i128)
);
assert_eq!(
fraction.denominator(),
Int256::from(1_000_000_000_000_000_000i128)
);
}
#[test]
fn signed_decimal_256_from_str_works() {
assert_eq!(
SignedDecimal256::from_str("0").unwrap(),
SignedDecimal256::percent(0)
);
assert_eq!(
SignedDecimal256::from_str("1").unwrap(),
SignedDecimal256::percent(100)
);
assert_eq!(
SignedDecimal256::from_str("5").unwrap(),
SignedDecimal256::percent(500)
);
assert_eq!(
SignedDecimal256::from_str("42").unwrap(),
SignedDecimal256::percent(4200)
);
assert_eq!(
SignedDecimal256::from_str("000").unwrap(),
SignedDecimal256::percent(0)
);
assert_eq!(
SignedDecimal256::from_str("001").unwrap(),
SignedDecimal256::percent(100)
);
assert_eq!(
SignedDecimal256::from_str("005").unwrap(),
SignedDecimal256::percent(500)
);
assert_eq!(
SignedDecimal256::from_str("0042").unwrap(),
SignedDecimal256::percent(4200)
);
assert_eq!(
SignedDecimal256::from_str("1.0").unwrap(),
SignedDecimal256::percent(100)
);
assert_eq!(
SignedDecimal256::from_str("1.5").unwrap(),
SignedDecimal256::percent(150)
);
assert_eq!(
SignedDecimal256::from_str("0.5").unwrap(),
SignedDecimal256::percent(50)
);
assert_eq!(
SignedDecimal256::from_str("0.123").unwrap(),
SignedDecimal256::permille(123)
);
assert_eq!(
SignedDecimal256::from_str("40.00").unwrap(),
SignedDecimal256::percent(4000)
);
assert_eq!(
SignedDecimal256::from_str("04.00").unwrap(),
SignedDecimal256::percent(400)
);
assert_eq!(
SignedDecimal256::from_str("00.40").unwrap(),
SignedDecimal256::percent(40)
);
assert_eq!(
SignedDecimal256::from_str("00.04").unwrap(),
SignedDecimal256::percent(4)
);
assert_eq!(
SignedDecimal256::from_str("-00.04").unwrap(),
SignedDecimal256::percent(-4)
);
assert_eq!(
SignedDecimal256::from_str("-00.40").unwrap(),
SignedDecimal256::percent(-40)
);
assert_eq!(
SignedDecimal256::from_str("-04.00").unwrap(),
SignedDecimal256::percent(-400)
);
assert_eq!(
SignedDecimal256::from_str("7.123456789012345678").unwrap(),
SignedDecimal256(Int256::from(7123456789012345678i128))
);
assert_eq!(
SignedDecimal256::from_str("7.999999999999999999").unwrap(),
SignedDecimal256(Int256::from(7999999999999999999i128))
);
assert_eq!(
SignedDecimal256::from_str(
"57896044618658097711785492504343953926634992332820282019728.792003956564819967"
)
.unwrap(),
SignedDecimal256::MAX
);
assert_eq!(
SignedDecimal256::from_str(
"-57896044618658097711785492504343953926634992332820282019728.792003956564819968"
)
.unwrap(),
SignedDecimal256::MIN
);
assert_eq!(
SignedDecimal256::from_str("-1").unwrap(),
SignedDecimal256::negative_one()
);
}
#[test]
fn signed_decimal_256_from_str_errors_for_broken_whole_part() {
let expected_err = StdError::generic_err("Error parsing whole");
assert_eq!(SignedDecimal256::from_str("").unwrap_err(), expected_err);
assert_eq!(SignedDecimal256::from_str(" ").unwrap_err(), expected_err);
assert_eq!(SignedDecimal256::from_str("-").unwrap_err(), expected_err);
}
#[test]
fn signed_decimal_256_from_str_errors_for_broken_fractional_part() {
let expected_err = StdError::generic_err("Error parsing fractional");
assert_eq!(SignedDecimal256::from_str("1.").unwrap_err(), expected_err);
assert_eq!(SignedDecimal256::from_str("1. ").unwrap_err(), expected_err);
assert_eq!(SignedDecimal256::from_str("1.e").unwrap_err(), expected_err);
assert_eq!(
SignedDecimal256::from_str("1.2e3").unwrap_err(),
expected_err
);
assert_eq!(
SignedDecimal256::from_str("1.-2").unwrap_err(),
expected_err
);
}
#[test]
fn signed_decimal_256_from_str_errors_for_more_than_18_fractional_digits() {
let expected_err = StdError::generic_err("Cannot parse more than 18 fractional digits");
assert_eq!(
SignedDecimal256::from_str("7.1234567890123456789").unwrap_err(),
expected_err
);
assert_eq!(
SignedDecimal256::from_str("7.1230000000000000000").unwrap_err(),
expected_err
);
}
#[test]
fn signed_decimal_256_from_str_errors_for_invalid_number_of_dots() {
let expected_err = StdError::generic_err("Unexpected number of dots");
assert_eq!(
SignedDecimal256::from_str("1.2.3").unwrap_err(),
expected_err
);
assert_eq!(
SignedDecimal256::from_str("1.2.3.4").unwrap_err(),
expected_err
);
}
#[test]
fn signed_decimal_256_from_str_errors_for_more_than_max_value() {
let expected_err = StdError::generic_err("Value too big");
assert_eq!(
SignedDecimal256::from_str(
"57896044618658097711785492504343953926634992332820282019729",
)
.unwrap_err(),
expected_err
);
assert_eq!(
SignedDecimal256::from_str(
"-57896044618658097711785492504343953926634992332820282019729",
)
.unwrap_err(),
expected_err
);
assert_eq!(
SignedDecimal256::from_str(
"57896044618658097711785492504343953926634992332820282019729.0",
)
.unwrap_err(),
expected_err
);
assert_eq!(
SignedDecimal256::from_str(
"57896044618658097711785492504343953926634992332820282019728.792003956564819968",
)
.unwrap_err(),
expected_err
);
assert_eq!(
SignedDecimal256::from_str(
"-57896044618658097711785492504343953926634992332820282019728.792003956564819969",
)
.unwrap_err(),
expected_err
);
}
#[test]
fn signed_decimal_256_conversions_work() {
assert_eq!(
SignedDecimal256::from(SignedDecimal::zero()),
SignedDecimal256::zero()
);
assert_eq!(
SignedDecimal256::from(SignedDecimal::one()),
SignedDecimal256::one()
);
assert_eq!(
SignedDecimal256::from(SignedDecimal::percent(50)),
SignedDecimal256::percent(50)
);
assert_eq!(
SignedDecimal256::from(SignedDecimal::MAX),
SignedDecimal256::new(Int256::from_i128(i128::MAX))
);
assert_eq!(
SignedDecimal256::from(SignedDecimal::percent(-50)),
SignedDecimal256::percent(-50)
);
assert_eq!(
SignedDecimal256::from(SignedDecimal::MIN),
SignedDecimal256::new(Int256::from_i128(i128::MIN))
);
}
#[test]
fn signed_decimal_256_atomics_works() {
let zero = SignedDecimal256::zero();
let one = SignedDecimal256::one();
let half = SignedDecimal256::percent(50);
let two = SignedDecimal256::percent(200);
let max = SignedDecimal256::MAX;
let neg_half = SignedDecimal256::percent(-50);
let neg_two = SignedDecimal256::percent(-200);
let min = SignedDecimal256::MIN;
assert_eq!(zero.atomics(), Int256::from(0));
assert_eq!(one.atomics(), Int256::from(1000000000000000000i128));
assert_eq!(half.atomics(), Int256::from(500000000000000000i128));
assert_eq!(two.atomics(), Int256::from(2000000000000000000i128));
assert_eq!(max.atomics(), Int256::MAX);
assert_eq!(neg_half.atomics(), Int256::from(-500000000000000000i128));
assert_eq!(neg_two.atomics(), Int256::from(-2000000000000000000i128));
assert_eq!(min.atomics(), Int256::MIN);
}
#[test]
fn signed_decimal_256_decimal_places_works() {
let zero = SignedDecimal256::zero();
let one = SignedDecimal256::one();
let half = SignedDecimal256::percent(50);
let two = SignedDecimal256::percent(200);
let max = SignedDecimal256::MAX;
let neg_one = SignedDecimal256::negative_one();
assert_eq!(zero.decimal_places(), 18);
assert_eq!(one.decimal_places(), 18);
assert_eq!(half.decimal_places(), 18);
assert_eq!(two.decimal_places(), 18);
assert_eq!(max.decimal_places(), 18);
assert_eq!(neg_one.decimal_places(), 18);
}
#[test]
fn signed_decimal_256_is_zero_works() {
assert!(SignedDecimal256::zero().is_zero());
assert!(SignedDecimal256::percent(0).is_zero());
assert!(SignedDecimal256::permille(0).is_zero());
assert!(!SignedDecimal256::one().is_zero());
assert!(!SignedDecimal256::percent(123).is_zero());
assert!(!SignedDecimal256::permille(-1234).is_zero());
}
#[test]
fn signed_decimal_256_inv_works() {
assert_eq!(SignedDecimal256::zero().inv(), None);
assert_eq!(SignedDecimal256::one().inv(), Some(SignedDecimal256::one()));
assert_eq!(
SignedDecimal256::negative_one().inv(),
Some(SignedDecimal256::negative_one())
);
assert_eq!(
SignedDecimal256::from_str("2").unwrap().inv(),
Some(SignedDecimal256::from_str("0.5").unwrap())
);
assert_eq!(
SignedDecimal256::from_str("20").unwrap().inv(),
Some(SignedDecimal256::from_str("0.05").unwrap())
);
assert_eq!(
SignedDecimal256::from_str("200").unwrap().inv(),
Some(SignedDecimal256::from_str("0.005").unwrap())
);
assert_eq!(
SignedDecimal256::from_str("2000").unwrap().inv(),
Some(SignedDecimal256::from_str("0.0005").unwrap())
);
assert_eq!(
SignedDecimal256::from_str("3").unwrap().inv(),
Some(SignedDecimal256::from_str("0.333333333333333333").unwrap())
);
assert_eq!(
SignedDecimal256::from_str("6").unwrap().inv(),
Some(SignedDecimal256::from_str("0.166666666666666666").unwrap())
);
assert_eq!(
SignedDecimal256::from_str("0.5").unwrap().inv(),
Some(SignedDecimal256::from_str("2").unwrap())
);
assert_eq!(
SignedDecimal256::from_str("0.05").unwrap().inv(),
Some(SignedDecimal256::from_str("20").unwrap())
);
assert_eq!(
SignedDecimal256::from_str("0.005").unwrap().inv(),
Some(SignedDecimal256::from_str("200").unwrap())
);
assert_eq!(
SignedDecimal256::from_str("0.0005").unwrap().inv(),
Some(SignedDecimal256::from_str("2000").unwrap())
);
assert_eq!(
SignedDecimal256::from_str("-0.5").unwrap().inv(),
Some(SignedDecimal256::from_str("-2").unwrap())
);
assert_eq!(
SignedDecimal256::from_str("-3").unwrap().inv(),
Some(SignedDecimal256::from_str("-0.333333333333333333").unwrap())
);
}
#[test]
#[allow(clippy::op_ref)]
fn signed_decimal_256_add_works() {
let value = SignedDecimal256::one() + SignedDecimal256::percent(50); assert_eq!(
value.0,
SignedDecimal256::DECIMAL_FRACTIONAL * Int256::from(3u8) / Int256::from(2u8)
);
assert_eq!(
SignedDecimal256::percent(5) + SignedDecimal256::percent(4),
SignedDecimal256::percent(9)
);
assert_eq!(
SignedDecimal256::percent(5) + SignedDecimal256::zero(),
SignedDecimal256::percent(5)
);
assert_eq!(
SignedDecimal256::zero() + SignedDecimal256::zero(),
SignedDecimal256::zero()
);
assert_eq!(
SignedDecimal256::percent(-5) + SignedDecimal256::percent(-4),
SignedDecimal256::percent(-9)
);
assert_eq!(
SignedDecimal256::percent(-5) + SignedDecimal256::percent(4),
SignedDecimal256::percent(-1)
);
assert_eq!(
SignedDecimal256::percent(5) + SignedDecimal256::percent(-4),
SignedDecimal256::percent(1)
);
let a = SignedDecimal256::percent(15);
let b = SignedDecimal256::percent(25);
let expected = SignedDecimal256::percent(40);
assert_eq!(a + b, expected);
assert_eq!(&a + b, expected);
assert_eq!(a + &b, expected);
assert_eq!(&a + &b, expected);
}
#[test]
#[should_panic]
fn signed_decimal_256_add_overflow_panics() {
let _value = SignedDecimal256::MAX + SignedDecimal256::percent(50);
}
#[test]
fn signed_decimal_256_add_assign_works() {
let mut a = SignedDecimal256::percent(30);
a += SignedDecimal256::percent(20);
assert_eq!(a, SignedDecimal256::percent(50));
let mut a = SignedDecimal256::percent(15);
let b = SignedDecimal256::percent(3);
let expected = SignedDecimal256::percent(18);
a += &b;
assert_eq!(a, expected);
}
#[test]
#[allow(clippy::op_ref)]
fn signed_decimal_256_sub_works() {
let value = SignedDecimal256::one() - SignedDecimal256::percent(50); assert_eq!(
value.0,
SignedDecimal256::DECIMAL_FRACTIONAL / Int256::from(2u8)
);
assert_eq!(
SignedDecimal256::percent(9) - SignedDecimal256::percent(4),
SignedDecimal256::percent(5)
);
assert_eq!(
SignedDecimal256::percent(16) - SignedDecimal256::zero(),
SignedDecimal256::percent(16)
);
assert_eq!(
SignedDecimal256::percent(16) - SignedDecimal256::percent(16),
SignedDecimal256::zero()
);
assert_eq!(
SignedDecimal256::zero() - SignedDecimal256::zero(),
SignedDecimal256::zero()
);
assert_eq!(
SignedDecimal256::percent(-5) - SignedDecimal256::percent(-4),
SignedDecimal256::percent(-1)
);
assert_eq!(
SignedDecimal256::percent(-5) - SignedDecimal256::percent(4),
SignedDecimal256::percent(-9)
);
assert_eq!(
SignedDecimal256::percent(500) - SignedDecimal256::percent(-4),
SignedDecimal256::percent(504)
);
let a = SignedDecimal256::percent(13);
let b = SignedDecimal256::percent(6);
let expected = SignedDecimal256::percent(7);
assert_eq!(a - b, expected);
assert_eq!(&a - b, expected);
assert_eq!(a - &b, expected);
assert_eq!(&a - &b, expected);
}
#[test]
#[should_panic]
fn signed_decimal_256_sub_overflow_panics() {
let _value = SignedDecimal256::MIN - SignedDecimal256::percent(50);
}
#[test]
fn signed_decimal_256_sub_assign_works() {
let mut a = SignedDecimal256::percent(20);
a -= SignedDecimal256::percent(2);
assert_eq!(a, SignedDecimal256::percent(18));
let mut a = SignedDecimal256::percent(33);
let b = SignedDecimal256::percent(13);
let expected = SignedDecimal256::percent(20);
a -= &b;
assert_eq!(a, expected);
}
#[test]
#[allow(clippy::op_ref)]
fn signed_decimal_256_implements_mul() {
let one = SignedDecimal256::one();
let two = one + one;
let half = SignedDecimal256::percent(50);
assert_eq!(
one * SignedDecimal256::percent(0),
SignedDecimal256::percent(0)
);
assert_eq!(
one * SignedDecimal256::percent(1),
SignedDecimal256::percent(1)
);
assert_eq!(
one * SignedDecimal256::percent(10),
SignedDecimal256::percent(10)
);
assert_eq!(
one * SignedDecimal256::percent(100),
SignedDecimal256::percent(100)
);
assert_eq!(
one * SignedDecimal256::percent(1000),
SignedDecimal256::percent(1000)
);
assert_eq!(one * SignedDecimal256::MAX, SignedDecimal256::MAX);
assert_eq!(
SignedDecimal256::percent(0) * one,
SignedDecimal256::percent(0)
);
assert_eq!(
SignedDecimal256::percent(1) * one,
SignedDecimal256::percent(1)
);
assert_eq!(
SignedDecimal256::percent(10) * one,
SignedDecimal256::percent(10)
);
assert_eq!(
SignedDecimal256::percent(100) * one,
SignedDecimal256::percent(100)
);
assert_eq!(
SignedDecimal256::percent(1000) * one,
SignedDecimal256::percent(1000)
);
assert_eq!(SignedDecimal256::MAX * one, SignedDecimal256::MAX);
assert_eq!(
SignedDecimal256::percent(-1) * one,
SignedDecimal256::percent(-1)
);
assert_eq!(
one * SignedDecimal256::percent(-10),
SignedDecimal256::percent(-10)
);
assert_eq!(
two * SignedDecimal256::percent(0),
SignedDecimal256::percent(0)
);
assert_eq!(
two * SignedDecimal256::percent(1),
SignedDecimal256::percent(2)
);
assert_eq!(
two * SignedDecimal256::percent(10),
SignedDecimal256::percent(20)
);
assert_eq!(
two * SignedDecimal256::percent(100),
SignedDecimal256::percent(200)
);
assert_eq!(
two * SignedDecimal256::percent(1000),
SignedDecimal256::percent(2000)
);
assert_eq!(
SignedDecimal256::percent(0) * two,
SignedDecimal256::percent(0)
);
assert_eq!(
SignedDecimal256::percent(1) * two,
SignedDecimal256::percent(2)
);
assert_eq!(
SignedDecimal256::percent(10) * two,
SignedDecimal256::percent(20)
);
assert_eq!(
SignedDecimal256::percent(100) * two,
SignedDecimal256::percent(200)
);
assert_eq!(
SignedDecimal256::percent(1000) * two,
SignedDecimal256::percent(2000)
);
assert_eq!(
SignedDecimal256::percent(-1) * two,
SignedDecimal256::percent(-2)
);
assert_eq!(
two * SignedDecimal256::new(Int256::MIN / Int256::from(2)),
SignedDecimal256::MIN
);
assert_eq!(
half * SignedDecimal256::percent(0),
SignedDecimal256::percent(0)
);
assert_eq!(
half * SignedDecimal256::percent(1),
SignedDecimal256::permille(5)
);
assert_eq!(
half * SignedDecimal256::percent(10),
SignedDecimal256::percent(5)
);
assert_eq!(
half * SignedDecimal256::percent(100),
SignedDecimal256::percent(50)
);
assert_eq!(
half * SignedDecimal256::percent(1000),
SignedDecimal256::percent(500)
);
assert_eq!(
SignedDecimal256::percent(0) * half,
SignedDecimal256::percent(0)
);
assert_eq!(
SignedDecimal256::percent(1) * half,
SignedDecimal256::permille(5)
);
assert_eq!(
SignedDecimal256::percent(10) * half,
SignedDecimal256::percent(5)
);
assert_eq!(
SignedDecimal256::percent(100) * half,
SignedDecimal256::percent(50)
);
assert_eq!(
SignedDecimal256::percent(1000) * half,
SignedDecimal256::percent(500)
);
let a = dec("123.127726548762582");
assert_eq!(a * dec("1"), dec("123.127726548762582"));
assert_eq!(a * dec("10"), dec("1231.27726548762582"));
assert_eq!(a * dec("100"), dec("12312.7726548762582"));
assert_eq!(a * dec("1000"), dec("123127.726548762582"));
assert_eq!(a * dec("1000000"), dec("123127726.548762582"));
assert_eq!(a * dec("1000000000"), dec("123127726548.762582"));
assert_eq!(a * dec("1000000000000"), dec("123127726548762.582"));
assert_eq!(a * dec("1000000000000000"), dec("123127726548762582"));
assert_eq!(a * dec("1000000000000000000"), dec("123127726548762582000"));
assert_eq!(dec("1") * a, dec("123.127726548762582"));
assert_eq!(dec("10") * a, dec("1231.27726548762582"));
assert_eq!(dec("100") * a, dec("12312.7726548762582"));
assert_eq!(dec("1000") * a, dec("123127.726548762582"));
assert_eq!(dec("1000000") * a, dec("123127726.548762582"));
assert_eq!(dec("1000000000") * a, dec("123127726548.762582"));
assert_eq!(dec("1000000000000") * a, dec("123127726548762.582"));
assert_eq!(dec("1000000000000000") * a, dec("123127726548762582"));
assert_eq!(dec("1000000000000000000") * a, dec("123127726548762582000"));
assert_eq!(
dec("-1000000000000000000") * a,
dec("-123127726548762582000")
);
let max = SignedDecimal256::MAX;
assert_eq!(
max * dec("1.0"),
dec("57896044618658097711785492504343953926634992332820282019728.792003956564819967")
);
assert_eq!(
max * dec("0.1"),
dec("5789604461865809771178549250434395392663499233282028201972.879200395656481996")
);
assert_eq!(
max * dec("0.01"),
dec("578960446186580977117854925043439539266349923328202820197.287920039565648199")
);
assert_eq!(
max * dec("0.001"),
dec("57896044618658097711785492504343953926634992332820282019.728792003956564819")
);
assert_eq!(
max * dec("0.000001"),
dec("57896044618658097711785492504343953926634992332820282.019728792003956564")
);
assert_eq!(
max * dec("0.000000001"),
dec("57896044618658097711785492504343953926634992332820.282019728792003956")
);
assert_eq!(
max * dec("0.000000000001"),
dec("57896044618658097711785492504343953926634992332.820282019728792003")
);
assert_eq!(
max * dec("0.000000000000001"),
dec("57896044618658097711785492504343953926634992.332820282019728792")
);
assert_eq!(
max * dec("0.000000000000000001"),
dec("57896044618658097711785492504343953926634.992332820282019728")
);
let a = SignedDecimal256::percent(20);
let b = SignedDecimal256::percent(30);
let expected = SignedDecimal256::percent(6);
assert_eq!(a * b, expected);
assert_eq!(&a * b, expected);
assert_eq!(a * &b, expected);
assert_eq!(&a * &b, expected);
}
#[test]
fn signed_decimal_256_mul_assign_works() {
let mut a = SignedDecimal256::percent(15);
a *= SignedDecimal256::percent(60);
assert_eq!(a, SignedDecimal256::percent(9));
let mut a = SignedDecimal256::percent(50);
let b = SignedDecimal256::percent(20);
a *= &b;
assert_eq!(a, SignedDecimal256::percent(10));
}
#[test]
#[should_panic(expected = "attempt to multiply with overflow")]
fn signed_decimal_256_mul_overflow_panics() {
let _value = SignedDecimal256::MAX * SignedDecimal256::percent(101);
}
#[test]
fn signed_decimal_256_checked_mul() {
let test_data = [
(SignedDecimal256::zero(), SignedDecimal256::zero()),
(SignedDecimal256::zero(), SignedDecimal256::one()),
(SignedDecimal256::one(), SignedDecimal256::zero()),
(SignedDecimal256::percent(10), SignedDecimal256::zero()),
(SignedDecimal256::percent(10), SignedDecimal256::percent(5)),
(SignedDecimal256::MAX, SignedDecimal256::one()),
(
SignedDecimal256::MAX / Int256::from(2),
SignedDecimal256::percent(200),
),
(
SignedDecimal256::permille(6),
SignedDecimal256::permille(13),
),
(
SignedDecimal256::permille(-6),
SignedDecimal256::permille(0),
),
(SignedDecimal256::MAX, SignedDecimal256::negative_one()),
];
for (x, y) in test_data.into_iter() {
assert_eq!(x * y, x.checked_mul(y).unwrap());
}
}
#[test]
fn signed_decimal_256_checked_mul_overflow() {
assert_eq!(
SignedDecimal256::MAX.checked_mul(SignedDecimal256::percent(200)),
Err(OverflowError {
operation: OverflowOperation::Mul,
operand1: SignedDecimal256::MAX.to_string(),
operand2: SignedDecimal256::percent(200).to_string(),
})
);
}
#[test]
#[allow(clippy::op_ref)]
fn signed_decimal_256_implements_div() {
let one = SignedDecimal256::one();
let two = one + one;
let half = SignedDecimal256::percent(50);
assert_eq!(
one / SignedDecimal256::percent(1),
SignedDecimal256::percent(10_000)
);
assert_eq!(
one / SignedDecimal256::percent(10),
SignedDecimal256::percent(1_000)
);
assert_eq!(
one / SignedDecimal256::percent(100),
SignedDecimal256::percent(100)
);
assert_eq!(
one / SignedDecimal256::percent(1000),
SignedDecimal256::percent(10)
);
assert_eq!(
SignedDecimal256::percent(0) / one,
SignedDecimal256::percent(0)
);
assert_eq!(
SignedDecimal256::percent(1) / one,
SignedDecimal256::percent(1)
);
assert_eq!(
SignedDecimal256::percent(10) / one,
SignedDecimal256::percent(10)
);
assert_eq!(
SignedDecimal256::percent(100) / one,
SignedDecimal256::percent(100)
);
assert_eq!(
SignedDecimal256::percent(1000) / one,
SignedDecimal256::percent(1000)
);
assert_eq!(
one / SignedDecimal256::percent(-1),
SignedDecimal256::percent(-10_000)
);
assert_eq!(
one / SignedDecimal256::percent(-10),
SignedDecimal256::percent(-1_000)
);
assert_eq!(
two / SignedDecimal256::percent(1),
SignedDecimal256::percent(20_000)
);
assert_eq!(
two / SignedDecimal256::percent(10),
SignedDecimal256::percent(2_000)
);
assert_eq!(
two / SignedDecimal256::percent(100),
SignedDecimal256::percent(200)
);
assert_eq!(
two / SignedDecimal256::percent(1000),
SignedDecimal256::percent(20)
);
assert_eq!(
SignedDecimal256::percent(0) / two,
SignedDecimal256::percent(0)
);
assert_eq!(SignedDecimal256::percent(1) / two, dec("0.005"));
assert_eq!(
SignedDecimal256::percent(10) / two,
SignedDecimal256::percent(5)
);
assert_eq!(
SignedDecimal256::percent(100) / two,
SignedDecimal256::percent(50)
);
assert_eq!(
SignedDecimal256::percent(1000) / two,
SignedDecimal256::percent(500)
);
assert_eq!(
two / SignedDecimal256::percent(-1),
SignedDecimal256::percent(-20_000)
);
assert_eq!(
SignedDecimal256::percent(-10000) / two,
SignedDecimal256::percent(-5000)
);
assert_eq!(
half / SignedDecimal256::percent(1),
SignedDecimal256::percent(5_000)
);
assert_eq!(
half / SignedDecimal256::percent(10),
SignedDecimal256::percent(500)
);
assert_eq!(
half / SignedDecimal256::percent(100),
SignedDecimal256::percent(50)
);
assert_eq!(
half / SignedDecimal256::percent(1000),
SignedDecimal256::percent(5)
);
assert_eq!(
SignedDecimal256::percent(0) / half,
SignedDecimal256::percent(0)
);
assert_eq!(
SignedDecimal256::percent(1) / half,
SignedDecimal256::percent(2)
);
assert_eq!(
SignedDecimal256::percent(10) / half,
SignedDecimal256::percent(20)
);
assert_eq!(
SignedDecimal256::percent(100) / half,
SignedDecimal256::percent(200)
);
assert_eq!(
SignedDecimal256::percent(1000) / half,
SignedDecimal256::percent(2000)
);
let a = dec("123127726548762582");
assert_eq!(a / dec("1"), dec("123127726548762582"));
assert_eq!(a / dec("10"), dec("12312772654876258.2"));
assert_eq!(a / dec("100"), dec("1231277265487625.82"));
assert_eq!(a / dec("1000"), dec("123127726548762.582"));
assert_eq!(a / dec("1000000"), dec("123127726548.762582"));
assert_eq!(a / dec("1000000000"), dec("123127726.548762582"));
assert_eq!(a / dec("1000000000000"), dec("123127.726548762582"));
assert_eq!(a / dec("1000000000000000"), dec("123.127726548762582"));
assert_eq!(a / dec("1000000000000000000"), dec("0.123127726548762582"));
assert_eq!(dec("1") / a, dec("0.000000000000000008"));
assert_eq!(dec("10") / a, dec("0.000000000000000081"));
assert_eq!(dec("100") / a, dec("0.000000000000000812"));
assert_eq!(dec("1000") / a, dec("0.000000000000008121"));
assert_eq!(dec("1000000") / a, dec("0.000000000008121647"));
assert_eq!(dec("1000000000") / a, dec("0.000000008121647560"));
assert_eq!(dec("1000000000000") / a, dec("0.000008121647560868"));
assert_eq!(dec("1000000000000000") / a, dec("0.008121647560868164"));
assert_eq!(dec("1000000000000000000") / a, dec("8.121647560868164773"));
let a = dec("-123127726548762582");
assert_eq!(a / dec("1"), dec("-123127726548762582"));
assert_eq!(a / dec("10"), dec("-12312772654876258.2"));
assert_eq!(a / dec("100"), dec("-1231277265487625.82"));
assert_eq!(a / dec("1000"), dec("-123127726548762.582"));
assert_eq!(a / dec("1000000"), dec("-123127726548.762582"));
assert_eq!(a / dec("1000000000"), dec("-123127726.548762582"));
assert_eq!(a / dec("1000000000000"), dec("-123127.726548762582"));
assert_eq!(a / dec("1000000000000000"), dec("-123.127726548762582"));
assert_eq!(a / dec("1000000000000000000"), dec("-0.123127726548762582"));
assert_eq!(dec("1") / a, dec("-0.000000000000000008"));
let a = dec("0.123127726548762582");
assert_eq!(a / dec("1.0"), dec("0.123127726548762582"));
assert_eq!(a / dec("0.1"), dec("1.23127726548762582"));
assert_eq!(a / dec("0.01"), dec("12.3127726548762582"));
assert_eq!(a / dec("0.001"), dec("123.127726548762582"));
assert_eq!(a / dec("0.000001"), dec("123127.726548762582"));
assert_eq!(a / dec("0.000000001"), dec("123127726.548762582"));
assert_eq!(a / dec("0.000000000001"), dec("123127726548.762582"));
assert_eq!(a / dec("0.000000000000001"), dec("123127726548762.582"));
assert_eq!(a / dec("0.000000000000000001"), dec("123127726548762582"));
let a = dec("-0.123127726548762582");
assert_eq!(a / dec("1.0"), dec("-0.123127726548762582"));
assert_eq!(a / dec("0.1"), dec("-1.23127726548762582"));
assert_eq!(a / dec("0.01"), dec("-12.3127726548762582"));
assert_eq!(a / dec("0.001"), dec("-123.127726548762582"));
assert_eq!(a / dec("0.000001"), dec("-123127.726548762582"));
assert_eq!(a / dec("0.000000001"), dec("-123127726.548762582"));
assert_eq!(
SignedDecimal256::percent(15) / SignedDecimal256::percent(60),
SignedDecimal256::percent(25)
);
let a = SignedDecimal256::percent(100);
let b = SignedDecimal256::percent(20);
let expected = SignedDecimal256::percent(500);
assert_eq!(a / b, expected);
assert_eq!(&a / b, expected);
assert_eq!(a / &b, expected);
assert_eq!(&a / &b, expected);
}
#[test]
fn signed_decimal_256_div_assign_works() {
let mut a = SignedDecimal256::percent(15);
a /= SignedDecimal256::percent(20);
assert_eq!(a, SignedDecimal256::percent(75));
let mut a = SignedDecimal256::percent(50);
let b = SignedDecimal256::percent(20);
a /= &b;
assert_eq!(a, SignedDecimal256::percent(250));
}
#[test]
#[should_panic(expected = "Division failed - multiplication overflow")]
fn signed_decimal_256_div_overflow_panics() {
let _value = SignedDecimal256::MAX / SignedDecimal256::percent(10);
}
#[test]
#[should_panic(expected = "Division failed - denominator must not be zero")]
fn signed_decimal_256_div_by_zero_panics() {
let _value = SignedDecimal256::one() / SignedDecimal256::zero();
}
#[test]
fn signed_decimal_256_int128_division() {
let left = SignedDecimal256::percent(150); let right = Int256::from(3);
assert_eq!(left / right, SignedDecimal256::percent(50));
let left = SignedDecimal256::percent(-150); let right = Int256::from(3);
assert_eq!(left / right, SignedDecimal256::percent(-50));
let left = SignedDecimal256::zero();
let right = Int256::from(300);
assert_eq!(left / right, SignedDecimal256::zero());
}
#[test]
#[should_panic]
fn signed_decimal_256_int128_divide_by_zero() {
let left = SignedDecimal256::percent(150); let right = Int256::from(0);
let _result = left / right;
}
#[test]
fn signed_decimal_256_int128_div_assign() {
let mut dec = SignedDecimal256::percent(150); dec /= Int256::from(3);
assert_eq!(dec, SignedDecimal256::percent(50));
let mut dec = SignedDecimal256::zero();
dec /= Int256::from(300);
assert_eq!(dec, SignedDecimal256::zero());
}
#[test]
#[should_panic]
fn signed_decimal_256_int128_div_assign_by_zero() {
let mut dec = SignedDecimal256::percent(50);
dec /= Int256::from(0);
}
#[test]
fn signed_decimal_256_checked_pow() {
for exp in 0..10 {
assert_eq!(
SignedDecimal256::one().checked_pow(exp).unwrap(),
SignedDecimal256::one()
);
}
assert_eq!(
SignedDecimal256::zero().checked_pow(0).unwrap(),
SignedDecimal256::one()
);
for exp in 1..10 {
assert_eq!(
SignedDecimal256::zero().checked_pow(exp).unwrap(),
SignedDecimal256::zero()
);
}
for exp in 1..10 {
assert_eq!(
SignedDecimal256::negative_one().checked_pow(exp).unwrap(),
if exp % 2 == 0 {
SignedDecimal256::one()
} else {
SignedDecimal256::negative_one()
}
)
}
for num in &[
SignedDecimal256::percent(50),
SignedDecimal256::percent(99),
SignedDecimal256::percent(200),
] {
assert_eq!(num.checked_pow(0).unwrap(), SignedDecimal256::one())
}
assert_eq!(
SignedDecimal256::percent(20).checked_pow(2).unwrap(),
SignedDecimal256::percent(4)
);
assert_eq!(
SignedDecimal256::percent(20).checked_pow(3).unwrap(),
SignedDecimal256::permille(8)
);
assert_eq!(
SignedDecimal256::percent(200).checked_pow(4).unwrap(),
SignedDecimal256::percent(1600)
);
assert_eq!(
SignedDecimal256::percent(200).checked_pow(4).unwrap(),
SignedDecimal256::percent(1600)
);
assert_eq!(
SignedDecimal256::percent(700).checked_pow(5).unwrap(),
SignedDecimal256::percent(1680700)
);
assert_eq!(
SignedDecimal256::percent(700).checked_pow(8).unwrap(),
SignedDecimal256::percent(576480100)
);
assert_eq!(
SignedDecimal256::percent(700).checked_pow(10).unwrap(),
SignedDecimal256::percent(28247524900)
);
assert_eq!(
SignedDecimal256::percent(120).checked_pow(123).unwrap(),
SignedDecimal256(5486473221892422150877397607i128.into())
);
assert_eq!(
SignedDecimal256::percent(10).checked_pow(2).unwrap(),
SignedDecimal256(10000000000000000i128.into())
);
assert_eq!(
SignedDecimal256::percent(10).checked_pow(18).unwrap(),
SignedDecimal256(1i128.into())
);
let decimals = [
SignedDecimal256::percent(-50),
SignedDecimal256::percent(-99),
SignedDecimal256::percent(-200),
];
let exponents = [1, 2, 3, 4, 5, 8, 10];
for d in decimals {
for e in exponents {
let mut mul = Ok(d);
for _ in 1..e {
mul = mul.and_then(|mul| mul.checked_mul(d));
}
assert_eq!(mul, d.checked_pow(e));
}
}
}
#[test]
fn signed_decimal_256_checked_pow_overflow() {
assert_eq!(
SignedDecimal256::MAX.checked_pow(2),
Err(OverflowError {
operation: OverflowOperation::Pow,
operand1: SignedDecimal256::MAX.to_string(),
operand2: "2".to_string(),
})
);
}
#[test]
fn signed_decimal_256_to_string() {
assert_eq!(SignedDecimal256::zero().to_string(), "0");
assert_eq!(SignedDecimal256::one().to_string(), "1");
assert_eq!(SignedDecimal256::percent(500).to_string(), "5");
assert_eq!(SignedDecimal256::percent(-500).to_string(), "-5");
assert_eq!(SignedDecimal256::percent(125).to_string(), "1.25");
assert_eq!(SignedDecimal256::percent(42638).to_string(), "426.38");
assert_eq!(SignedDecimal256::percent(3).to_string(), "0.03");
assert_eq!(SignedDecimal256::permille(987).to_string(), "0.987");
assert_eq!(SignedDecimal256::percent(-125).to_string(), "-1.25");
assert_eq!(SignedDecimal256::percent(-42638).to_string(), "-426.38");
assert_eq!(SignedDecimal256::percent(-3).to_string(), "-0.03");
assert_eq!(SignedDecimal256::permille(-987).to_string(), "-0.987");
assert_eq!(
SignedDecimal256(Int256::from(1i128)).to_string(),
"0.000000000000000001"
);
assert_eq!(
SignedDecimal256(Int256::from(10i128)).to_string(),
"0.00000000000000001"
);
assert_eq!(
SignedDecimal256(Int256::from(100i128)).to_string(),
"0.0000000000000001"
);
assert_eq!(
SignedDecimal256(Int256::from(1000i128)).to_string(),
"0.000000000000001"
);
assert_eq!(
SignedDecimal256(Int256::from(10000i128)).to_string(),
"0.00000000000001"
);
assert_eq!(
SignedDecimal256(Int256::from(100000i128)).to_string(),
"0.0000000000001"
);
assert_eq!(
SignedDecimal256(Int256::from(1000000i128)).to_string(),
"0.000000000001"
);
assert_eq!(
SignedDecimal256(Int256::from(10000000i128)).to_string(),
"0.00000000001"
);
assert_eq!(
SignedDecimal256(Int256::from(100000000i128)).to_string(),
"0.0000000001"
);
assert_eq!(
SignedDecimal256(Int256::from(1000000000i128)).to_string(),
"0.000000001"
);
assert_eq!(
SignedDecimal256(Int256::from(10000000000i128)).to_string(),
"0.00000001"
);
assert_eq!(
SignedDecimal256(Int256::from(100000000000i128)).to_string(),
"0.0000001"
);
assert_eq!(
SignedDecimal256(Int256::from(10000000000000i128)).to_string(),
"0.00001"
);
assert_eq!(
SignedDecimal256(Int256::from(100000000000000i128)).to_string(),
"0.0001"
);
assert_eq!(
SignedDecimal256(Int256::from(1000000000000000i128)).to_string(),
"0.001"
);
assert_eq!(
SignedDecimal256(Int256::from(10000000000000000i128)).to_string(),
"0.01"
);
assert_eq!(
SignedDecimal256(Int256::from(100000000000000000i128)).to_string(),
"0.1"
);
assert_eq!(
SignedDecimal256(Int256::from(-1i128)).to_string(),
"-0.000000000000000001"
);
assert_eq!(
SignedDecimal256(Int256::from(-100000000000000i128)).to_string(),
"-0.0001"
);
assert_eq!(
SignedDecimal256(Int256::from(-100000000000000000i128)).to_string(),
"-0.1"
);
}
#[test]
fn signed_decimal_256_iter_sum() {
let items = vec![
SignedDecimal256::zero(),
SignedDecimal256(Int256::from(2i128)),
SignedDecimal256(Int256::from(2i128)),
SignedDecimal256(Int256::from(-2i128)),
];
assert_eq!(
items.iter().sum::<SignedDecimal256>(),
SignedDecimal256(Int256::from(2i128))
);
assert_eq!(
items.into_iter().sum::<SignedDecimal256>(),
SignedDecimal256(Int256::from(2i128))
);
let empty: Vec<SignedDecimal256> = vec![];
assert_eq!(
SignedDecimal256::zero(),
empty.iter().sum::<SignedDecimal256>()
);
}
#[test]
fn signed_decimal_256_serialize() {
assert_eq!(to_json_vec(&SignedDecimal256::zero()).unwrap(), br#""0""#);
assert_eq!(to_json_vec(&SignedDecimal256::one()).unwrap(), br#""1""#);
assert_eq!(
to_json_vec(&SignedDecimal256::percent(8)).unwrap(),
br#""0.08""#
);
assert_eq!(
to_json_vec(&SignedDecimal256::percent(87)).unwrap(),
br#""0.87""#
);
assert_eq!(
to_json_vec(&SignedDecimal256::percent(876)).unwrap(),
br#""8.76""#
);
assert_eq!(
to_json_vec(&SignedDecimal256::percent(8765)).unwrap(),
br#""87.65""#
);
assert_eq!(
to_json_vec(&SignedDecimal256::percent(-87654)).unwrap(),
br#""-876.54""#
);
assert_eq!(
to_json_vec(&SignedDecimal256::negative_one()).unwrap(),
br#""-1""#
);
assert_eq!(
to_json_vec(&-SignedDecimal256::percent(8)).unwrap(),
br#""-0.08""#
);
}
#[test]
fn signed_decimal_256_deserialize() {
assert_eq!(
from_json::<SignedDecimal256>(br#""0""#).unwrap(),
SignedDecimal256::zero()
);
assert_eq!(
from_json::<SignedDecimal256>(br#""1""#).unwrap(),
SignedDecimal256::one()
);
assert_eq!(
from_json::<SignedDecimal256>(br#""000""#).unwrap(),
SignedDecimal256::zero()
);
assert_eq!(
from_json::<SignedDecimal256>(br#""001""#).unwrap(),
SignedDecimal256::one()
);
assert_eq!(
from_json::<SignedDecimal256>(br#""0.08""#).unwrap(),
SignedDecimal256::percent(8)
);
assert_eq!(
from_json::<SignedDecimal256>(br#""0.87""#).unwrap(),
SignedDecimal256::percent(87)
);
assert_eq!(
from_json::<SignedDecimal256>(br#""8.76""#).unwrap(),
SignedDecimal256::percent(876)
);
assert_eq!(
from_json::<SignedDecimal256>(br#""87.65""#).unwrap(),
SignedDecimal256::percent(8765)
);
assert_eq!(
from_json::<SignedDecimal256>(br#""-0""#).unwrap(),
SignedDecimal256::zero()
);
assert_eq!(
from_json::<SignedDecimal256>(br#""-1""#).unwrap(),
SignedDecimal256::negative_one()
);
assert_eq!(
from_json::<SignedDecimal256>(br#""-001""#).unwrap(),
SignedDecimal256::negative_one()
);
assert_eq!(
from_json::<SignedDecimal256>(br#""-0.08""#).unwrap(),
SignedDecimal256::percent(-8)
);
}
#[test]
fn signed_decimal_256_abs_diff_works() {
let a = SignedDecimal256::percent(285);
let b = SignedDecimal256::percent(200);
let expected = Decimal256::percent(85);
assert_eq!(a.abs_diff(b), expected);
assert_eq!(b.abs_diff(a), expected);
let a = SignedDecimal256::percent(-200);
let b = SignedDecimal256::percent(200);
let expected = Decimal256::percent(400);
assert_eq!(a.abs_diff(b), expected);
assert_eq!(b.abs_diff(a), expected);
let a = SignedDecimal256::percent(-200);
let b = SignedDecimal256::percent(-240);
let expected = Decimal256::percent(40);
assert_eq!(a.abs_diff(b), expected);
assert_eq!(b.abs_diff(a), expected);
}
#[test]
#[allow(clippy::op_ref)]
fn signed_decimal_256_rem_works() {
assert_eq!(
SignedDecimal256::percent(402) % SignedDecimal256::percent(111),
SignedDecimal256::percent(69)
);
assert_eq!(
SignedDecimal256::percent(1525) % SignedDecimal256::percent(400),
SignedDecimal256::percent(325)
);
assert_eq!(
SignedDecimal256::percent(-2025) % SignedDecimal256::percent(500),
SignedDecimal256::percent(-25)
);
let a = SignedDecimal256::percent(318);
let b = SignedDecimal256::percent(317);
let expected = SignedDecimal256::percent(1);
assert_eq!(a % b, expected);
assert_eq!(a % &b, expected);
assert_eq!(&a % b, expected);
assert_eq!(&a % &b, expected);
}
#[test]
fn signed_decimal_256_rem_assign_works() {
let mut a = SignedDecimal256::percent(17673);
a %= SignedDecimal256::percent(2362);
assert_eq!(a, SignedDecimal256::percent(1139)); let mut a = SignedDecimal256::percent(4262);
let b = SignedDecimal256::percent(1270);
a %= &b;
assert_eq!(a, SignedDecimal256::percent(452)); let mut a = SignedDecimal256::percent(-4262);
let b = SignedDecimal256::percent(1270);
a %= &b;
assert_eq!(a, SignedDecimal256::percent(-452)); }
#[test]
#[should_panic(expected = "divisor of zero")]
fn signed_decimal_256_rem_panics_for_zero() {
let _ = SignedDecimal256::percent(777) % SignedDecimal256::zero();
}
#[test]
fn signed_decimal_256_checked_methods() {
assert_eq!(
SignedDecimal256::percent(402)
.checked_add(SignedDecimal256::percent(111))
.unwrap(),
SignedDecimal256::percent(513)
);
assert!(matches!(
SignedDecimal256::MAX.checked_add(SignedDecimal256::percent(1)),
Err(OverflowError { .. })
));
assert!(matches!(
SignedDecimal256::MIN.checked_add(SignedDecimal256::percent(-1)),
Err(OverflowError { .. })
));
assert_eq!(
SignedDecimal256::percent(1111)
.checked_sub(SignedDecimal256::percent(111))
.unwrap(),
SignedDecimal256::percent(1000)
);
assert_eq!(
SignedDecimal256::zero()
.checked_sub(SignedDecimal256::percent(1))
.unwrap(),
SignedDecimal256::percent(-1)
);
assert!(matches!(
SignedDecimal256::MIN.checked_sub(SignedDecimal256::percent(1)),
Err(OverflowError { .. })
));
assert!(matches!(
SignedDecimal256::MAX.checked_sub(SignedDecimal256::percent(-1)),
Err(OverflowError { .. })
));
assert_eq!(
SignedDecimal256::percent(30)
.checked_div(SignedDecimal256::percent(200))
.unwrap(),
SignedDecimal256::percent(15)
);
assert_eq!(
SignedDecimal256::percent(88)
.checked_div(SignedDecimal256::percent(20))
.unwrap(),
SignedDecimal256::percent(440)
);
assert!(matches!(
SignedDecimal256::MAX.checked_div(SignedDecimal256::zero()),
Err(CheckedFromRatioError::DivideByZero {})
));
assert!(matches!(
SignedDecimal256::MAX.checked_div(SignedDecimal256::percent(1)),
Err(CheckedFromRatioError::Overflow {})
));
assert_eq!(
SignedDecimal256::percent(-88)
.checked_div(SignedDecimal256::percent(20))
.unwrap(),
SignedDecimal256::percent(-440)
);
assert_eq!(
SignedDecimal256::percent(-88)
.checked_div(SignedDecimal256::percent(-20))
.unwrap(),
SignedDecimal256::percent(440)
);
assert_eq!(
SignedDecimal256::percent(402)
.checked_rem(SignedDecimal256::percent(111))
.unwrap(),
SignedDecimal256::percent(69)
);
assert_eq!(
SignedDecimal256::percent(1525)
.checked_rem(SignedDecimal256::percent(400))
.unwrap(),
SignedDecimal256::percent(325)
);
assert_eq!(
SignedDecimal256::percent(-1525)
.checked_rem(SignedDecimal256::percent(400))
.unwrap(),
SignedDecimal256::percent(-325)
);
assert_eq!(
SignedDecimal256::percent(-1525)
.checked_rem(SignedDecimal256::percent(-400))
.unwrap(),
SignedDecimal256::percent(-325)
);
assert!(matches!(
SignedDecimal256::MAX.checked_rem(SignedDecimal256::zero()),
Err(DivideByZeroError { .. })
));
}
#[test]
fn signed_decimal_256_pow_works() {
assert_eq!(
SignedDecimal256::percent(200).pow(2),
SignedDecimal256::percent(400)
);
assert_eq!(
SignedDecimal256::percent(-200).pow(2),
SignedDecimal256::percent(400)
);
assert_eq!(
SignedDecimal256::percent(-200).pow(3),
SignedDecimal256::percent(-800)
);
assert_eq!(
SignedDecimal256::percent(200).pow(10),
SignedDecimal256::percent(102400)
);
}
#[test]
#[should_panic]
fn signed_decimal_256_pow_overflow_panics() {
_ = SignedDecimal256::MAX.pow(2u32);
}
#[test]
fn signed_decimal_256_saturating_works() {
assert_eq!(
SignedDecimal256::percent(200).saturating_add(SignedDecimal256::percent(200)),
SignedDecimal256::percent(400)
);
assert_eq!(
SignedDecimal256::percent(-200).saturating_add(SignedDecimal256::percent(200)),
SignedDecimal256::zero()
);
assert_eq!(
SignedDecimal256::percent(-200).saturating_add(SignedDecimal256::percent(-200)),
SignedDecimal256::percent(-400)
);
assert_eq!(
SignedDecimal256::MAX.saturating_add(SignedDecimal256::percent(200)),
SignedDecimal256::MAX
);
assert_eq!(
SignedDecimal256::MIN.saturating_add(SignedDecimal256::percent(-1)),
SignedDecimal256::MIN
);
assert_eq!(
SignedDecimal256::percent(200).saturating_sub(SignedDecimal256::percent(100)),
SignedDecimal256::percent(100)
);
assert_eq!(
SignedDecimal256::percent(-200).saturating_sub(SignedDecimal256::percent(100)),
SignedDecimal256::percent(-300)
);
assert_eq!(
SignedDecimal256::percent(-200).saturating_sub(SignedDecimal256::percent(-100)),
SignedDecimal256::percent(-100)
);
assert_eq!(
SignedDecimal256::zero().saturating_sub(SignedDecimal256::percent(200)),
SignedDecimal256::from_str("-2").unwrap()
);
assert_eq!(
SignedDecimal256::MIN.saturating_sub(SignedDecimal256::percent(200)),
SignedDecimal256::MIN
);
assert_eq!(
SignedDecimal256::MAX.saturating_sub(SignedDecimal256::percent(-200)),
SignedDecimal256::MAX
);
assert_eq!(
SignedDecimal256::percent(200).saturating_mul(SignedDecimal256::percent(50)),
SignedDecimal256::percent(100)
);
assert_eq!(
SignedDecimal256::percent(-200).saturating_mul(SignedDecimal256::percent(50)),
SignedDecimal256::percent(-100)
);
assert_eq!(
SignedDecimal256::percent(-200).saturating_mul(SignedDecimal256::percent(-50)),
SignedDecimal256::percent(100)
);
assert_eq!(
SignedDecimal256::MAX.saturating_mul(SignedDecimal256::percent(200)),
SignedDecimal256::MAX
);
assert_eq!(
SignedDecimal256::MIN.saturating_mul(SignedDecimal256::percent(200)),
SignedDecimal256::MIN
);
assert_eq!(
SignedDecimal256::MIN.saturating_mul(SignedDecimal256::percent(-200)),
SignedDecimal256::MAX
);
assert_eq!(
SignedDecimal256::percent(400).saturating_pow(2u32),
SignedDecimal256::percent(1600)
);
assert_eq!(
SignedDecimal256::MAX.saturating_pow(2u32),
SignedDecimal256::MAX
);
assert_eq!(
SignedDecimal256::MAX.saturating_pow(3u32),
SignedDecimal256::MAX
);
assert_eq!(
SignedDecimal256::MIN.saturating_pow(2u32),
SignedDecimal256::MAX
);
assert_eq!(
SignedDecimal256::MIN.saturating_pow(3u32),
SignedDecimal256::MIN
);
}
#[test]
fn signed_decimal_256_rounding() {
assert_eq!(SignedDecimal256::one().floor(), SignedDecimal256::one());
assert_eq!(
SignedDecimal256::percent(150).floor(),
SignedDecimal256::one()
);
assert_eq!(
SignedDecimal256::percent(199).floor(),
SignedDecimal256::one()
);
assert_eq!(
SignedDecimal256::percent(200).floor(),
SignedDecimal256::percent(200)
);
assert_eq!(
SignedDecimal256::percent(99).floor(),
SignedDecimal256::zero()
);
assert_eq!(
SignedDecimal256(Int256::from(1i128)).floor(),
SignedDecimal256::zero()
);
assert_eq!(
SignedDecimal256(Int256::from(-1i128)).floor(),
SignedDecimal256::negative_one()
);
assert_eq!(
SignedDecimal256::permille(-1234).floor(),
SignedDecimal256::percent(-200)
);
assert_eq!(SignedDecimal256::one().ceil(), SignedDecimal256::one());
assert_eq!(
SignedDecimal256::percent(150).ceil(),
SignedDecimal256::percent(200)
);
assert_eq!(
SignedDecimal256::percent(199).ceil(),
SignedDecimal256::percent(200)
);
assert_eq!(
SignedDecimal256::percent(99).ceil(),
SignedDecimal256::one()
);
assert_eq!(
SignedDecimal256(Int256::from(1i128)).ceil(),
SignedDecimal256::one()
);
assert_eq!(
SignedDecimal256(Int256::from(-1i128)).ceil(),
SignedDecimal256::zero()
);
assert_eq!(
SignedDecimal256::permille(-1234).ceil(),
SignedDecimal256::negative_one()
);
assert_eq!(SignedDecimal256::one().trunc(), SignedDecimal256::one());
assert_eq!(
SignedDecimal256::percent(150).trunc(),
SignedDecimal256::one()
);
assert_eq!(
SignedDecimal256::percent(199).trunc(),
SignedDecimal256::one()
);
assert_eq!(
SignedDecimal256::percent(200).trunc(),
SignedDecimal256::percent(200)
);
assert_eq!(
SignedDecimal256::percent(99).trunc(),
SignedDecimal256::zero()
);
assert_eq!(
SignedDecimal256(Int256::from(1i128)).trunc(),
SignedDecimal256::zero()
);
assert_eq!(
SignedDecimal256(Int256::from(-1i128)).trunc(),
SignedDecimal256::zero()
);
assert_eq!(
SignedDecimal256::permille(-1234).trunc(),
SignedDecimal256::negative_one()
);
}
#[test]
#[should_panic(expected = "attempt to ceil with overflow")]
fn signed_decimal_256_ceil_panics() {
let _ = SignedDecimal256::MAX.ceil();
}
#[test]
#[should_panic(expected = "attempt to floor with overflow")]
fn signed_decimal_256_floor_panics() {
let _ = SignedDecimal256::MIN.floor();
}
#[test]
fn signed_decimal_256_checked_ceil() {
assert_eq!(
SignedDecimal256::percent(199).checked_ceil(),
Ok(SignedDecimal256::percent(200))
);
assert_eq!(
SignedDecimal256::MAX.checked_ceil(),
Err(RoundUpOverflowError)
);
}
#[test]
fn signed_decimal_256_checked_floor() {
assert_eq!(
SignedDecimal256::percent(199).checked_floor(),
Ok(SignedDecimal256::one())
);
assert_eq!(
SignedDecimal256::percent(-199).checked_floor(),
Ok(SignedDecimal256::percent(-200))
);
assert_eq!(
SignedDecimal256::MIN.checked_floor(),
Err(RoundDownOverflowError)
);
assert_eq!(
SignedDecimal256::negative_one().checked_floor(),
Ok(SignedDecimal256::negative_one())
);
}
#[test]
fn signed_decimal_256_to_int_floor_works() {
let d = SignedDecimal256::from_str("12.000000000000000001").unwrap();
assert_eq!(d.to_int_floor(), Int256::from(12));
let d = SignedDecimal256::from_str("12.345").unwrap();
assert_eq!(d.to_int_floor(), Int256::from(12));
let d = SignedDecimal256::from_str("12.999").unwrap();
assert_eq!(d.to_int_floor(), Int256::from(12));
let d = SignedDecimal256::from_str("0.98451384").unwrap();
assert_eq!(d.to_int_floor(), Int256::from(0));
let d = SignedDecimal256::from_str("-12.000000000000000001").unwrap();
assert_eq!(d.to_int_floor(), Int256::from(-13));
let d = SignedDecimal256::from_str("-12.345").unwrap();
assert_eq!(d.to_int_floor(), Int256::from(-13));
let d = SignedDecimal256::from_str("0.0001").unwrap();
assert_eq!(d.to_int_floor(), Int256::from(0));
let d = SignedDecimal256::from_str("75.0").unwrap();
assert_eq!(d.to_int_floor(), Int256::from(75));
let d = SignedDecimal256::from_str("0.0").unwrap();
assert_eq!(d.to_int_floor(), Int256::from(0));
let d = SignedDecimal256::from_str("-0.0").unwrap();
assert_eq!(d.to_int_floor(), Int256::from(0));
let d = SignedDecimal256::from_str("-0.0001").unwrap();
assert_eq!(d.to_int_floor(), Int256::from(-1));
let d = SignedDecimal256::from_str("-75.0").unwrap();
assert_eq!(d.to_int_floor(), Int256::from(-75));
let d = SignedDecimal256::MAX;
assert_eq!(
d.to_int_floor(),
Int256::from_str("57896044618658097711785492504343953926634992332820282019728")
.unwrap()
);
let d = SignedDecimal256::MIN;
assert_eq!(
d.to_int_floor(),
Int256::from_str("-57896044618658097711785492504343953926634992332820282019729")
.unwrap()
);
}
#[test]
fn signed_decimal_256_to_int_ceil_works() {
let d = SignedDecimal256::from_str("12.000000000000000001").unwrap();
assert_eq!(d.to_int_ceil(), Int256::from(13));
let d = SignedDecimal256::from_str("12.345").unwrap();
assert_eq!(d.to_int_ceil(), Int256::from(13));
let d = SignedDecimal256::from_str("12.999").unwrap();
assert_eq!(d.to_int_ceil(), Int256::from(13));
let d = SignedDecimal256::from_str("-12.000000000000000001").unwrap();
assert_eq!(d.to_int_ceil(), Int256::from(-12));
let d = SignedDecimal256::from_str("-12.345").unwrap();
assert_eq!(d.to_int_ceil(), Int256::from(-12));
let d = SignedDecimal256::from_str("75.0").unwrap();
assert_eq!(d.to_int_ceil(), Int256::from(75));
let d = SignedDecimal256::from_str("0.0").unwrap();
assert_eq!(d.to_int_ceil(), Int256::from(0));
let d = SignedDecimal256::from_str("-75.0").unwrap();
assert_eq!(d.to_int_ceil(), Int256::from(-75));
let d = SignedDecimal256::MAX;
assert_eq!(
d.to_int_ceil(),
Int256::from_str("57896044618658097711785492504343953926634992332820282019729")
.unwrap()
);
let d = SignedDecimal256::MIN;
assert_eq!(
d.to_int_ceil(),
Int256::from_str("-57896044618658097711785492504343953926634992332820282019728")
.unwrap()
);
}
#[test]
fn signed_decimal_256_to_int_trunc_works() {
let d = SignedDecimal256::from_str("12.000000000000000001").unwrap();
assert_eq!(d.to_int_trunc(), Int256::from(12));
let d = SignedDecimal256::from_str("12.345").unwrap();
assert_eq!(d.to_int_trunc(), Int256::from(12));
let d = SignedDecimal256::from_str("12.999").unwrap();
assert_eq!(d.to_int_trunc(), Int256::from(12));
let d = SignedDecimal256::from_str("-12.000000000000000001").unwrap();
assert_eq!(d.to_int_trunc(), Int256::from(-12));
let d = SignedDecimal256::from_str("-12.345").unwrap();
assert_eq!(d.to_int_trunc(), Int256::from(-12));
let d = SignedDecimal256::from_str("75.0").unwrap();
assert_eq!(d.to_int_trunc(), Int256::from(75));
let d = SignedDecimal256::from_str("0.0").unwrap();
assert_eq!(d.to_int_trunc(), Int256::from(0));
let d = SignedDecimal256::from_str("-75.0").unwrap();
assert_eq!(d.to_int_trunc(), Int256::from(-75));
let d = SignedDecimal256::MAX;
assert_eq!(
d.to_int_trunc(),
Int256::from_str("57896044618658097711785492504343953926634992332820282019728")
.unwrap()
);
let d = SignedDecimal256::MIN;
assert_eq!(
d.to_int_trunc(),
Int256::from_str("-57896044618658097711785492504343953926634992332820282019728")
.unwrap()
);
}
#[test]
fn signed_decimal_256_neg_works() {
assert_eq!(
-SignedDecimal256::percent(50),
SignedDecimal256::percent(-50)
);
assert_eq!(-SignedDecimal256::one(), SignedDecimal256::negative_one());
}
#[test]
fn signed_decimal_256_partial_eq() {
let test_cases = [
("1", "1", true),
("0.5", "0.5", true),
("0.5", "0.51", false),
("0", "0.00000", true),
("-1", "-1", true),
("-0.5", "-0.5", true),
("-0.5", "0.5", false),
("-0.5", "-0.51", false),
("-0", "-0.00000", true),
]
.into_iter()
.map(|(lhs, rhs, expected)| (dec(lhs), dec(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 signed_decimal_256_implements_debug() {
let decimal = SignedDecimal256::from_str("123.45").unwrap();
assert_eq!(format!("{decimal:?}"), "SignedDecimal256(123.45)");
let test_cases = ["5", "5.01", "42", "0", "2", "-0.000001"];
for s in test_cases {
let decimal = SignedDecimal256::from_str(s).unwrap();
let expected = format!("SignedDecimal256({s})");
assert_eq!(format!("{decimal:?}"), expected);
}
}
#[test]
fn signed_decimal_256_can_be_instantiated_from_decimal() {
let d: SignedDecimal256 = Decimal::one().into();
assert_eq!(d, SignedDecimal256::one());
}
#[test]
fn signed_decimal_256_can_be_instantiated_from_decimal_256() {
let d: SignedDecimal256 = Decimal256::zero().try_into().unwrap();
assert_eq!(d, SignedDecimal256::zero());
}
#[test]
fn signed_decimal_256_may_fail_when_instantiated_from_decimal_256() {
let err = <Decimal256 as TryInto<SignedDecimal256>>::try_into(Decimal256::MAX).unwrap_err();
assert_eq!("SignedDecimal256RangeExceeded", format!("{err:?}"));
assert_eq!("SignedDecimal256 range exceeded", format!("{err}"));
}
#[test]
fn signed_decimal_256_can_be_serialized_and_deserialized() {
let value: SignedDecimal256 = serde_json::from_str(r#""123""#).unwrap();
assert_eq!(SignedDecimal256::from_str("123").unwrap(), value);
let value = SignedDecimal256::from_str("456").unwrap();
assert_eq!(r#""456""#, serde_json::to_string(&value).unwrap());
assert_eq!(
"invalid type: integer `123`, expected string-encoded decimal at line 1 column 3",
serde_json::from_str::<SignedDecimal256>("123")
.err()
.unwrap()
.to_string()
);
assert_eq!(
"Error parsing decimal '1.e': Generic error: Error parsing fractional at line 1 column 5",
serde_json::from_str::<SignedDecimal256>(r#""1.e""#)
.err()
.unwrap()
.to_string()
);
}
#[test]
fn signed_decimal_256_has_defined_json_schema() {
let schema = schema_for!(SignedDecimal256);
assert_eq!(
"SignedDecimal256",
schema.schema.metadata.unwrap().title.unwrap()
);
}
}