58 lines
1.2 KiB
Rust
58 lines
1.2 KiB
Rust
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// Application.
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#[derive(Debug, Default)]
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pub struct App {
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// should the application exit?
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pub should_quit: bool,
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// counter
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pub counter: u8,
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}
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impl App {
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// Constructs a new instance of [`App`].
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pub fn new() -> Self {
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Self::default()
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}
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pub fn input(&mut self, input: &str) {
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println!("'{}'", input);
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if input == "quit" {
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self.quit();
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}
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}
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// Set running to false to quit the application.
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pub fn quit(&mut self) {
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self.should_quit = true;
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}
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pub fn increment_counter(&mut self) {
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if let Some(res) = self.counter.checked_add(1) {
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self.counter = res;
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}
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}
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pub fn decrement_counter(&mut self) {
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if let Some(res) = self.counter.checked_sub(1) {
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self.counter = res;
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}
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}
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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_app_increment_counter() {
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let mut app = App::default();
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app.increment_counter();
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assert_eq!(app.counter, 1);
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}
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#[test]
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fn test_app_decrement_counter() {
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let mut app = App::default();
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app.decrement_counter();
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assert_eq!(app.counter, 0);
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}
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}
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