rustlings/exercises/error_handling/errors4.rs

// errors4.rs
// Make this test pass! Execute `rustlings hint errors4` for hints :)


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

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

impl PositiveNonzeroInteger {
    fn new(value: i64) -> Result<PositiveNonzeroInteger, CreationError> {
/*
The following works, but I think could be best solved with a match case, or enum?
*/
        if value > 0 {
        Ok(PositiveNonzeroInteger(value as u64))
    }
    else if 
        value < 0 {
            Err(CreationError::Negative)
    }
        else {
            Err(CreationError::Zero)
    }
    }
    }


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