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