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// 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 <https://www.gnu.org/licenses/>.
use malachite_base::num::basic::floats::PrimitiveFloat;
use malachite_base::num::float::NiceFloat;
use malachite_base::test_util::generators::primitive_float_gen;
fn abs_negative_zero_helper<T: PrimitiveFloat>() {
let test = |n: T, out| {
let out = NiceFloat(out);
assert_eq!(NiceFloat(n.abs_negative_zero()), out);
let mut n = n;
n.abs_negative_zero_assign();
assert_eq!(NiceFloat(n), out);
};
test(T::ZERO, T::ZERO);
test(T::NEGATIVE_ZERO, T::ZERO);
test(T::NAN, T::NAN);
test(T::INFINITY, T::INFINITY);
test(T::NEGATIVE_INFINITY, T::NEGATIVE_INFINITY);
test(T::ONE, T::ONE);
test(T::NEGATIVE_ONE, T::NEGATIVE_ONE);
test(T::from(1.234), T::from(1.234));
test(T::from(-1.234), T::from(-1.234));
}
#[test]
fn test_abs_negative_zero() {
apply_fn_to_primitive_floats!(abs_negative_zero_helper);
}
fn abs_negative_zero_properties_helper<T: PrimitiveFloat>() {
primitive_float_gen::<T>().test_properties(|x| {
let y = x.abs_negative_zero();
let x = NiceFloat(x);
let y = NiceFloat(y);
assert!(x == y || x == NiceFloat(T::NEGATIVE_ZERO) && y == NiceFloat(T::ZERO));
assert_eq!(NiceFloat(y.0.abs_negative_zero()), y);
let mut x = x.0;
x.abs_negative_zero_assign();
assert_eq!(NiceFloat(x), y);
});
}
#[test]
fn abs_negative_zero_properties() {
apply_fn_to_primitive_floats!(abs_negative_zero_properties_helper);
}
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