100-exercises-to-learn-rust/exercises/04_traits/09_assoc_vs_generic/src/lib.rs

// TODO: Define a new trait, `Power`, that has a method `power` that raises `self` to the power of `n`.
//  The trait definition and its implementations should be enough to get the tests to compile and pass.

#[cfg(test)]
mod tests {
    use super::Power;

    #[test]
    fn test_power_u16() {
        let x: u32 = 2_u32.power(3u16);
        assert_eq!(x, 8);
    }

    #[test]
    fn test_power_u32() {
        let x: u32 = 2_u32.power(3u32);
        assert_eq!(x, 8);
    }

    #[test]
    fn test_power_ref_u32() {
        let x: u32 = 2_u32.power(&3u32);
        assert_eq!(x, 8);
    }
}