1pub mod tiny_macros; 2 3pub fn add(left: u64, right: u64) -> u64 { 4 5 left + right 6} 7 8#[cfg(test)] 9mod tests { 10 use super::*; 11 12 #[test] 13 fn it_works() { 14 let result = add(2, 2); 15 assert_eq!(result, 4); 16 } 17}