testing-rust-crates 0.1.6

learning to publish a crate to crates.io
Documentation 
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pub fn adder(n1: i32, n2: i32) -> i32 {
    println!("this is a new feature. well...");
    println!("oh yes");
    n1 + n2
}

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

    #[test]
    fn one_plus_two_is_three() {
        let result = adder(1, 2);
        assert_eq!(result, 3);
    }

    #[test]
    fn one_plus_negative_one_is_zero() {
        let result = adder(1, -1);
        assert_eq!(result, 0);
    }
}