unsafe extern "C" {
    fn CFNumberCreate(allocator: Object, kind: isize, value: Object) -> Object;
}

use super::*;

#[test]
fn native_values_are_type_checked_and_numbers_must_be_exact_and_nonnegative() {
    assert!(Owned::new(std::ptr::null()).is_none());
    unsafe {
        assert_eq!(number(std::ptr::null()), None);
        let text = Owned::string(c"27").unwrap();
        assert_eq!(number(text.0), None);
        for value in [-1_i64, 0, 100] {
            let object = Owned::new(CFNumberCreate(
                std::ptr::null(),
                4,
                (&value as *const i64).cast(),
            ))
            .unwrap();
            assert_eq!(number(object.0), u64::try_from(value).ok());
        }
        let fraction = 1.5_f64;
        let object = Owned::new(CFNumberCreate(
            std::ptr::null(),
            6,
            (&fraction as *const f64).cast(),
        ))
        .unwrap();
        assert_eq!(number(object.0), None);
    }
}