This repository has been archived on 2023-03-24. You can view files and clone it, but cannot push or open issues or pull requests.
rustlings-exercises-completed/exercises/enums/enums3.rs

64 lines
1.3 KiB
Rust
Raw Normal View History

2019-10-28 22:49:49 -05:00
// enums3.rs
// Address all the TODOs to make the tests pass!
enum Message {
// TODO: implement the message variant types based on their usage below
}
struct Point {
x: u8,
y: u8
}
struct State {
color: (u8, u8, u8),
position: Point,
quit: bool
}
impl State {
fn change_color(&mut self, color: (u8, u8, u8)) {
self.color = color;
}
fn quit(&mut self) {
self.quit = true;
}
fn echo(&self, s: String) {
println!("{}", s);
}
fn move_position(&mut self, p: Point) {
self.position = p;
}
fn process(&mut self, message: Message) {
// TODO: create a match expression to process the different message variants
}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_match_message_call() {
let mut state = State{
quit: false,
position: Point{ x: 0, y: 0 },
color: (0, 0, 0)
};
state.process(Message::ChangeColor(255, 0, 255));
state.process(Message::Echo(String::from("hello world")));
state.process(Message::Move{ x: 10, y: 15 });
state.process(Message::Quit);
assert_eq!(state.color, (255, 0, 255));
assert_eq!(state.position.x, 10);
assert_eq!(state.position.y, 15);
assert_eq!(state.quit, true);
}
}