// Make this test pass!

#[derive(PartialEq)]
struct PositiveNonzeroInteger(u64);

#[derive(PartialEq)]
enum CreationError {
    Negative,
    Zero,
}

impl PositiveNonzeroInteger {
    fn new(value: i64) -> Result<PositiveNonzeroInteger, CreationError> {
        Ok(PositiveNonzeroInteger(value as u64))
    }
}

#[test]
fn test_creation() {
    assert!(PositiveNonzeroInteger::new(10).is_ok());
    assert!(PositiveNonzeroInteger::new(-10) == Err(CreationError::Negative));
    assert!(PositiveNonzeroInteger::new(0) == Err(CreationError::Zero));
}