// Copyright © 2024 Mikhail Hogrefe
//
// This file is part of Malachite.
//
// Malachite is free software: you can redistribute it and/or modify it under the terms of the GNU
// Lesser General Public License (LGPL) as published by the Free Software Foundation; either version
// 3 of the License, or (at your option) any later version. See .
use malachite_base::num::basic::unsigneds::PrimitiveUnsigned;
use malachite_base::test_util::generators::{
unsigned_pair_gen_var_16, unsigned_pair_gen_var_27, unsigned_quadruple_gen_var_4,
unsigned_triple_gen_var_12,
};
use std::panic::catch_unwind;
fn mod_add_helper() {
let test = |x: T, y: T, m, out| {
assert_eq!(x.mod_add(y, m), out);
let mut x = x;
x.mod_add_assign(y, m);
assert_eq!(x, out);
};
test(T::ZERO, T::ZERO, T::ONE, T::ZERO);
test(
T::ZERO,
T::exact_from(3),
T::exact_from(5),
T::exact_from(3),
);
test(
T::exact_from(7),
T::exact_from(5),
T::exact_from(10),
T::TWO,
);
test(
T::exact_from(100),
T::exact_from(100),
T::exact_from(123),
T::exact_from(77),
);
test(T::MAX - T::ONE, T::ONE, T::MAX, T::ZERO);
test(T::MAX - T::ONE, T::MAX - T::ONE, T::MAX, T::MAX - T::TWO);
}
#[test]
fn test_mod_add() {
apply_fn_to_unsigneds!(mod_add_helper);
}
fn mod_add_fail_helper() {
assert_panic!(T::ZERO.mod_add(T::ZERO, T::ZERO));
assert_panic!(T::from(123u8).mod_add(T::from(200u8), T::from(200u8)));
assert_panic!(T::from(200u8).mod_add(T::from(123u8), T::from(200u8)));
}
#[test]
fn mod_add_fail() {
apply_fn_to_unsigneds!(mod_add_fail_helper);
}
fn mod_add_assign_fail_helper() {
assert_panic!({
let mut x = T::ZERO;
x.mod_add_assign(T::ZERO, T::ZERO);
});
assert_panic!({
let mut x = T::from(123u8);
x.mod_add_assign(T::from(200u8), T::from(200u8));
});
assert_panic!({
let mut x = T::from(200u8);
x.mod_add_assign(T::from(123u8), T::from(200u8));
});
}
#[test]
fn mod_add_assign_fail() {
apply_fn_to_unsigneds!(mod_add_assign_fail_helper);
}
fn mod_add_properties_helper() {
unsigned_triple_gen_var_12::().test_properties(|(x, y, m)| {
assert!(x.mod_is_reduced(&m));
assert!(y.mod_is_reduced(&m));
let sum = x.mod_add(y, m);
assert!(sum.mod_is_reduced(&m));
let mut x_alt = x;
x_alt.mod_add_assign(y, m);
assert_eq!(x_alt, sum);
assert_eq!(sum.mod_sub(y, m), x);
assert_eq!(sum.mod_sub(x, m), y);
assert_eq!(y.mod_add(x, m), sum);
assert_eq!(x.mod_sub(y.mod_neg(m), m), sum);
});
unsigned_pair_gen_var_16::().test_properties(|(x, m)| {
assert_eq!(x.mod_add(T::ZERO, m), x);
assert_eq!(T::ZERO.mod_add(x, m), x);
assert_eq!(x.mod_add(x.mod_neg(m), m), T::ZERO);
});
unsigned_pair_gen_var_27::().test_properties(|(x, y)| {
assert_panic!(x.mod_add(y, T::ZERO));
assert_panic!({
let mut x = x;
x.mod_add_assign(y, T::ZERO);
});
});
unsigned_quadruple_gen_var_4::().test_properties(|(x, y, z, m)| {
assert_eq!(x.mod_add(y, m).mod_add(z, m), x.mod_add(y.mod_add(z, m), m));
});
}
#[test]
fn mod_add_properties() {
apply_fn_to_unsigneds!(mod_add_properties_helper);
}