// 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::arithmetic::gcd::{gcd_binary, gcd_euclidean, gcd_fast_a, gcd_fast_b};
use malachite_base::num::basic::unsigneds::PrimitiveUnsigned;
use malachite_base::test_util::generators::{
unsigned_gen, unsigned_pair_gen_var_27, unsigned_triple_gen_var_19,
};
#[test]
fn test_gcd() {
fn test(x: T, y: T, out: T) {
assert_eq!(x.gcd(y), out);
let mut x = x;
x.gcd_assign(y);
assert_eq!(x, out);
}
test::(0, 0, 0);
test::(0, 6, 6);
test::(6, 0, 6);
test::(1, 6, 1);
test::(6, 1, 1);
test::(8, 12, 4);
test::(54, 24, 6);
test::(42, 56, 14);
test::(48, 18, 6);
test::(3, 5, 1);
test::(12, 60, 12);
test::(12, 90, 6);
}
fn gcd_properties_helper() {
unsigned_pair_gen_var_27::().test_properties(|(x, y)| {
let gcd = x.gcd(y);
assert_eq!(gcd_euclidean(x, y), gcd);
assert_eq!(gcd_binary(x, y), gcd);
assert_eq!(gcd_fast_a(x, y), gcd);
assert_eq!(gcd_fast_b(x, y), gcd);
let mut x_mut = x;
x_mut.gcd_assign(y);
assert_eq!(x_mut, gcd);
assert_eq!(y.gcd(x), gcd);
assert!(x.divisible_by(gcd));
assert!(y.divisible_by(gcd));
if gcd != T::ZERO {
assert!((x.div_exact(gcd)).coprime_with(y.div_exact(gcd)));
}
assert_eq!(gcd == T::ZERO, x == T::ZERO && y == T::ZERO);
});
unsigned_gen::().test_properties(|x| {
assert_eq!(x.gcd(x), x);
assert_eq!(x.gcd(T::ONE), T::ONE);
assert_eq!(x.gcd(T::ZERO), x);
});
unsigned_triple_gen_var_19::().test_properties(|(x, y, z)| {
assert_eq!(x.gcd(y).gcd(z), x.gcd(y.gcd(z)));
});
}
#[test]
fn gcd_properties() {
apply_fn_to_unsigneds!(gcd_properties_helper);
}