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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::integers::PrimitiveInt;
use malachite_base::num::basic::signeds::PrimitiveSigned;
use malachite_base::num::basic::unsigneds::PrimitiveUnsigned;
use malachite_base::test_util::generators::{signed_unsigned_pair_gen, unsigned_pair_gen};
#[test]
fn test_checked_pow() {
fn test<T: PrimitiveInt>(x: T, y: u64, out: Option<T>) {
assert_eq!(x.checked_pow(y), out);
}
test::<u8>(0, 0, Some(1));
test::<u64>(123, 0, Some(1));
test::<u64>(123, 1, Some(123));
test::<u16>(0, 123, Some(0));
test::<u16>(1, 123, Some(1));
test::<i16>(-1, 123, Some(-1));
test::<i16>(-1, 124, Some(1));
test::<u8>(3, 3, Some(27));
test::<i32>(-10, 9, Some(-1000000000));
test::<i32>(-10, 10, None);
test::<i16>(-10, 9, None);
test::<i16>(10, 9, None);
test::<i64>(123, 456, None);
test::<u64>(0, u64::MAX, Some(0));
test::<u64>(1, u64::MAX, Some(1));
test::<u64>(123, u64::MAX, None);
test::<i64>(0, u64::MAX, Some(0));
test::<i64>(1, u64::MAX, Some(1));
test::<i64>(-1, u64::MAX, Some(-1));
test::<i64>(-1, u64::MAX - 1, Some(1));
test::<i64>(123, u64::MAX, None);
test::<i64>(-123, u64::MAX, None);
test::<i64>(-123, u64::MAX - 1, None);
}
fn checked_pow_properties_helper_unsigned<T: PrimitiveUnsigned>() {
unsigned_pair_gen::<T, u64>().test_properties(|(x, y)| {
let power = x.checked_pow(y);
if let Some(power) = power {
if y != 0 {
assert!(power >= x);
}
assert_eq!(power, x.pow(y));
}
});
}
fn checked_pow_properties_helper_signed<T: PrimitiveSigned>() {
signed_unsigned_pair_gen::<T, u64>().test_properties(|(x, y)| {
let power = x.checked_pow(y);
if let Some(power) = power {
assert_eq!(power, x.pow(y));
}
});
}
#[test]
fn checked_pow_properties() {
apply_fn_to_unsigneds!(checked_pow_properties_helper_unsigned);
apply_fn_to_signeds!(checked_pow_properties_helper_signed);
}
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