calculatorgpweins 0.1.0

pub fn sum(left: i64, right: i64) -> i64 {
    left + right
}

#[cfg(test)]
mod tests {
    use super::*;

    #[test]
    fn sum_positive_numbers() {
        let result = sum(2, 2);
        assert_eq!(result, 4);
    }

    #[test]
    fn sum_positive_and_negative_numbers() {
        let result = sum(2, -2);
        assert_eq!(result, 0);
    }
}