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.

#[derive(Default)]
struct ColorClassicStruct {
    red:u32,
    green:u32,
    blue:u32,
}

#[derive(Default)]
struct ColorTupleStruct(u32,u32,u32);

#[derive(Debug)]
struct UnitLikeStruct;

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

    #[test]
    fn classic_c_structs() {
        // TODO: Instantiate a classic c struct!
        let mut green_0:ColorClassicStruct = Default::default();
        green_0.green = 256;
        let green = ColorClassicStruct{green:255,..green_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 unit_like_struct =UnitLikeStruct;
        let message = format!("{:?}s are fun!", unit_like_struct);

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