example/
lib.rs

1/// Add two numbers.
2pub fn add(a: i64, b: i64) -> i64 {
3    a + b
4}
5
6#[cfg(test)]
7mod tests {
8    use super::*;
9
10    #[test]
11    fn test_add() {
12        assert_eq!(add(2, 3), 5);
13    }
14}