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rustlings/exercises/08_enums/enums3.rs
Remo Senekowitsch 9a25309c1c Remove redundant enum definition task
The exercise enums2.rs already contains a task where an identical enum
has to be defined.
2024-09-11 16:57:12 +02:00

88 lines
2 KiB
Rust

struct Point {
x: u64,
y: u64,
}
enum Message {
Resize { width: u64, height: u64 },
Move(Point),
Echo(String),
ChangeColor(u8, u8, u8),
Quit,
}
struct State {
width: u64,
height: u64,
position: Point,
message: String,
// RGB color composed of red, green and blue.
color: (u8, u8, u8),
quit: bool,
}
impl State {
fn resize(&mut self, width: u64, height: u64) {
self.width = width;
self.height = height;
}
fn move_position(&mut self, point: Point) {
self.position = point;
}
fn echo(&mut self, s: String) {
self.message = s;
}
fn change_color(&mut self, red: u8, green: u8, blue: u8) {
self.color = (red, green, blue);
}
fn quit(&mut self) {
self.quit = true;
}
fn process(&mut self, message: Message) {
// TODO: Create a match expression to process the different message
// variants using the methods defined above.
}
}
fn main() {
// You can optionally experiment here.
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
fn test_match_message_call() {
let mut state = State {
width: 0,
height: 0,
position: Point { x: 0, y: 0 },
message: String::from("hello world"),
color: (0, 0, 0),
quit: false,
};
state.process(Message::Resize {
width: 10,
height: 30,
});
state.process(Message::Move(Point { x: 10, y: 15 }));
state.process(Message::Echo(String::from("Hello world!")));
state.process(Message::ChangeColor(255, 0, 255));
state.process(Message::Quit);
assert_eq!(state.width, 10);
assert_eq!(state.height, 30);
assert_eq!(state.position.x, 10);
assert_eq!(state.position.y, 15);
assert_eq!(state.message, "Hello world!");
assert_eq!(state.color, (255, 0, 255));
assert!(state.quit);
}
}