calculatorgpweins 0.1.0

A simple calculator library
Documentation 
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pub fn subtract(left: i64, right: i64) -> i64 {
    left - right
}

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

    #[test]
    fn subtract_and_return_zero() {
        let result = subtract(2, 2);
        assert_eq!(result, 0);
    }

    #[test]
    fn subtract_and_return_negative() {
        let result = subtract(2, 4);
        assert_eq!(result, -2);
    }
}