// 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::integers::PrimitiveInt;
use malachite_base::num::basic::signeds::PrimitiveSigned;
use malachite_base::num::basic::unsigneds::PrimitiveUnsigned;
use malachite_base::test_util::generators::{
signed_pair_gen, signed_triple_gen, unsigned_pair_gen_var_27, unsigned_triple_gen_var_19,
};
#[test]
fn test_saturating_sub_mul() {
fn test(x: T, y: T, z: T, out: T) {
assert_eq!(x.saturating_sub_mul(y, z), out);
let mut x = x;
x.saturating_sub_mul_assign(y, z);
assert_eq!(x, out);
}
test::(100, 3, 7, 79);
test::(60, 5, 10, 10);
test::(1000000, 456, 789, 640216);
test::(123, -456, 789, 359907);
test::(-123, 456, 789, -359907);
test::(127, 2, 100, -73);
test::(-127, -2, 100, 73);
test::(-128, 1, 0, -128);
test::(2, 10, 5, 0);
test::(-127, 2, 100, -128);
test::(-127, 1, 100, -128);
test::(127, -1, 100, 127);
test::(127, -10, 100, 127);
}
fn saturating_sub_mul_properties_helper_unsigned() {
unsigned_triple_gen_var_19::().test_properties(|(x, y, z)| {
let result = x.saturating_sub_mul(y, z);
let mut x_alt = x;
x_alt.saturating_sub_mul_assign(y, z);
assert_eq!(x_alt, result);
assert_eq!(x.saturating_sub_mul(z, y), result);
assert!(result <= x);
});
unsigned_pair_gen_var_27::().test_properties(|(a, b)| {
assert_eq!(a.saturating_sub_mul(T::ZERO, b), a);
assert_eq!(a.saturating_sub_mul(T::ONE, b), a.saturating_sub(b));
assert_eq!(a.saturating_sub_mul(b, T::ZERO), a);
assert_eq!(a.saturating_sub_mul(b, T::ONE), a.saturating_sub(b));
});
}
fn saturating_sub_mul_properties_helper_signed() {
signed_triple_gen::().test_properties(|(x, y, z)| {
let result = x.saturating_sub_mul(y, z);
let mut x_alt = x;
x_alt.saturating_sub_mul_assign(y, z);
assert_eq!(x_alt, result);
assert_eq!(x.saturating_sub_mul(z, y), result);
});
signed_pair_gen::().test_properties(|(a, b)| {
assert_eq!(a.saturating_sub_mul(T::ZERO, b), a);
assert_eq!(a.saturating_sub_mul(T::ONE, b), a.saturating_sub(b));
assert_eq!(a.saturating_sub_mul(b, T::ZERO), a);
assert_eq!(a.saturating_sub_mul(b, T::ONE), a.saturating_sub(b));
});
}
#[test]
fn saturating_sub_mul_properties() {
apply_fn_to_unsigneds!(saturating_sub_mul_properties_helper_unsigned);
apply_fn_to_signeds!(saturating_sub_mul_properties_helper_signed);
}