// 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_overflowing_sub_mul() { fn test(x: T, y: T, z: T, out: T, overflow: bool) { assert_eq!(x.overflowing_sub_mul(y, z), (out, overflow)); let mut x = x; assert_eq!(x.overflowing_sub_mul_assign(y, z), overflow); assert_eq!(x, out); } test::(100, 3, 7, 79, false); test::(60, 5, 10, 10, false); test::(1000000, 456, 789, 640216, false); test::(123, -456, 789, 359907, false); test::(-123, 456, 789, -359907, false); test::(127, 2, 100, -73, false); test::(-127, -2, 100, 73, false); test::(-128, 1, 0, -128, false); test::(2, 10, 5, 208, true); test::(-127, 2, 100, -71, true); test::(-127, 1, 100, 29, true); test::(127, -1, 100, -29, true); test::(127, -10, 100, 103, true); } fn overflowing_sub_mul_properties_helper_unsigned() { unsigned_triple_gen_var_19::().test_properties(|(x, y, z)| { let (result, overflow) = x.overflowing_sub_mul(y, z); let mut x_alt = x; assert_eq!(x_alt.overflowing_sub_mul_assign(y, z), overflow); assert_eq!(x_alt, result); assert_eq!(x.overflowing_sub_mul(z, y), (result, overflow)); assert_eq!(result.overflowing_add_mul(y, z), (x, overflow)); assert_eq!(x.wrapping_sub_mul(y, z), result); assert_eq!(x.checked_sub_mul(y, z).is_none(), overflow); }); unsigned_pair_gen_var_27::().test_properties(|(a, b)| { assert_eq!(a.overflowing_sub_mul(T::ZERO, b), (a, false)); assert_eq!(a.overflowing_sub_mul(T::ONE, b), a.overflowing_sub(b)); assert_eq!(a.overflowing_sub_mul(b, T::ZERO), (a, false)); assert_eq!(a.overflowing_sub_mul(b, T::ONE), a.overflowing_sub(b)); }); } fn overflowing_sub_mul_properties_helper_signed() { signed_triple_gen::().test_properties(|(x, y, z)| { let (result, overflow) = x.overflowing_sub_mul(y, z); let mut x_alt = x; assert_eq!(x_alt.overflowing_sub_mul_assign(y, z), overflow); assert_eq!(x_alt, result); assert_eq!(x.overflowing_sub_mul(z, y), (result, overflow)); assert_eq!(result.overflowing_add_mul(y, z), (x, overflow)); assert_eq!(x.wrapping_sub_mul(y, z), result); assert_eq!(x.checked_sub_mul(y, z).is_none(), overflow); }); signed_pair_gen::().test_properties(|(a, b)| { assert_eq!(a.overflowing_sub_mul(T::ZERO, b), (a, false)); assert_eq!(a.overflowing_sub_mul(T::ONE, b), a.overflowing_sub(b)); assert_eq!(a.overflowing_sub_mul(b, T::ZERO), (a, false)); assert_eq!(a.overflowing_sub_mul(b, T::ONE), a.overflowing_sub(b)); }); } #[test] fn overflowing_sub_mul_properties() { apply_fn_to_unsigneds!(overflowing_sub_mul_properties_helper_unsigned); apply_fn_to_signeds!(overflowing_sub_mul_properties_helper_signed); }