test_rust_crate_adder/
lib.rs

1pub fn add(a: u64, b: u64) -> u64 {
2    a + b
3}
4
5#[cfg(test)]
6mod tests {
7    #[test]
8    fn it_works() {
9        let result = 2 + 2;
10        assert_eq!(result, 4);
11    }
12}