rustlings/exercises/structs/structs1.rs

// structs1.rs
//
// Address all the TODOs to make the tests pass!
//
// Execute `rustlings hint structs1` or use the `hint` watch subcommand for a
// hint.

struct ColorClassicStruct {
    // TODO: Something goes here
    red   : i32,
    green : i32, 
    blue  : i32,
}

struct ColorTupleStruct(i32, i32, i32);

#[derive(Debug)]
struct UnitLikeStruct;

#[derive(Debug)]
struct JustStefano;

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

    #[test]
    fn classic_c_structs() {
        // TODO: Instantiate a classic c struct!
        let green = ColorClassicStruct {
            red : 0, 
            green : 255,
            blue : 0,
        };

        assert_eq!(green.red, 0);
        assert_eq!(green.green, 255);
        assert_eq!(green.blue, 0);
    }

    #[test]
    fn tuple_structs() {
        // TODO: Instantiate a tuple struct!
        let green = ColorTupleStruct (0, 255, 0);

        assert_eq!(green.0, 0);
        assert_eq!(green.1, 255);
        assert_eq!(green.2, 0);
    }

    #[test]
    fn unit_structs() {
        // TODO: Instantiate a unit-like struct!
        let st = JustStefano{};
        let unit_like_struct = UnitLikeStruct {};
        let message = format!("{:?}s are fun!", unit_like_struct);

        let msg2 = format!("{:?}, hello ", st);

        assert_eq!(message, "UnitLikeStructs are fun!");
        assert_eq!(msg2, "JustStefano, hello ");
    }
}