use malachite_base::num::arithmetic::traits::Sign;
use malachite_base::test_util::generators::signed_gen;
use malachite_nz::integer::Integer;
use malachite_nz::platform::SignedLimb;
use malachite_nz::test_util::generators::integer_gen;
use malachite_nz::test_util::integer::arithmetic::sign::num_sign;
use num::BigInt;
use rug;
use std::cmp::Ordering;
use std::str::FromStr;
#[test]
fn test_sign() {
let test = |s, out| {
assert_eq!(Integer::from_str(s).unwrap().sign(), out);
assert_eq!(num_sign(&BigInt::from_str(s).unwrap()), out);
assert_eq!(rug::Integer::from_str(s).unwrap().cmp0(), out);
};
test("0", Ordering::Equal);
test("123", Ordering::Greater);
test("-123", Ordering::Less);
test("1000000000000", Ordering::Greater);
test("-1000000000000", Ordering::Less);
}
#[test]
fn sign_properties() {
integer_gen().test_properties(|n| {
let sign = n.sign();
assert_eq!(rug::Integer::from(&n).cmp0(), sign);
assert_eq!(num_sign(&BigInt::from(&n)), sign);
assert_eq!(n.partial_cmp(&0), Some(sign));
assert_eq!((-n).sign(), sign.reverse());
});
signed_gen::<SignedLimb>().test_properties(|i| {
assert_eq!(Integer::from(i).sign(), i.sign());
});
}