1pub fn say_hello(name: &str) -> String { 2 format!("Hello, {}!", name) 3} 4 5#[cfg(test)] 6mod tests { 7 use super::*; 8 9 #[test] 10 fn it_works() { 11 let result = say_hello("World"); 12 assert_eq!(result, "Hello, World!"); 13 } 14}