add_one_hiyuki/
lib.rs

1pub fn add_one(x: i32) -> i32 {
2    x + 1
3}
4
5#[cfg(test)]
6mod tests {
7    use super::*;
8
9    #[test]
10    fn it_works(){
11        assert_eq!(3, add_one(2));
12    }
13}