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_checked_sub_mul() {
fn test<T: PrimitiveInt>(x: T, y: T, z: T, out: Option<T>) {
assert_eq!(x.checked_sub_mul(y, z), out);
}
test::<u8>(100, 3, 7, Some(79));
test::<u32>(60, 5, 10, Some(10));
test::<u64>(1000000, 456, 789, Some(640216));
test::<i32>(123, -456, 789, Some(359907));
test::<i128>(-123, 456, 789, Some(-359907));
test::<i8>(127, 2, 100, Some(-73));
test::<i8>(-127, -2, 100, Some(73));
test::<i8>(-128, 1, 0, Some(-128));
test::<u8>(2, 10, 5, None);
test::<i8>(-127, 2, 100, None);
test::<i8>(-127, 1, 100, None);
test::<i8>(127, -1, 100, None);
test::<i8>(127, -10, 100, None);
}
fn checked_sub_mul_properties_helper_unsigned<T: PrimitiveUnsigned>() {
unsigned_triple_gen_var_19::<T>().test_properties(|(x, y, z)| {
let result = x.checked_sub_mul(y, z);
assert_eq!(x.checked_sub_mul(z, y), result);
assert_eq!(result.is_none(), x.overflowing_sub_mul(y, z).1);
});
unsigned_pair_gen_var_27::<T>().test_properties(|(a, b)| {
assert_eq!(a.checked_sub_mul(T::ZERO, b), Some(a));
assert_eq!(a.checked_sub_mul(T::ONE, b), a.checked_sub(b));
assert_eq!(a.checked_sub_mul(b, T::ZERO), Some(a));
assert_eq!(a.checked_sub_mul(b, T::ONE), a.checked_sub(b));
});
}
fn checked_sub_mul_properties_helper_signed<T: PrimitiveSigned>() {
signed_triple_gen::<T>().test_properties(|(x, y, z)| {
let result = x.checked_sub_mul(y, z);
assert_eq!(x.checked_sub_mul(z, y), result);
assert_eq!(result.is_none(), x.overflowing_sub_mul(y, z).1);
});
signed_pair_gen::<T>().test_properties(|(a, b)| {
assert_eq!(a.checked_sub_mul(T::ZERO, b), Some(a));
assert_eq!(a.checked_sub_mul(T::ONE, b), a.checked_sub(b));
assert_eq!(a.checked_sub_mul(b, T::ZERO), Some(a));
assert_eq!(a.checked_sub_mul(b, T::ONE), a.checked_sub(b));
});
}
#[test]
fn checked_sub_mul_properties() {
apply_fn_to_unsigneds!(checked_sub_mul_properties_helper_unsigned);
apply_fn_to_signeds!(checked_sub_mul_properties_helper_signed);
}