client_cli

client_cli/src/app.rs

@@ -0,0 +1,57 @@
+// Application.
+#[derive(Debug, Default)]
+pub struct App {
+    // should the application exit?
+    pub should_quit: bool,
+    // counter
+    pub counter: u8,
+}
+
+impl App {
+    // Constructs a new instance of [`App`].
+    pub fn new() -> Self {
+        Self::default()
+    }
+
+    pub fn input(&mut self, input: &str) {
+        println!("'{}'", input);
+        if input == "quit" {
+            self.quit();
+        }
+    }
+
+    // Set running to false to quit the application.
+    pub fn quit(&mut self) {
+        self.should_quit = true;
+    }
+
+    pub fn increment_counter(&mut self) {
+        if let Some(res) = self.counter.checked_add(1) {
+            self.counter = res;
+        }
+    }
+
+    pub fn decrement_counter(&mut self) {
+        if let Some(res) = self.counter.checked_sub(1) {
+            self.counter = res;
+        }
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+    #[test]
+    fn test_app_increment_counter() {
+        let mut app = App::default();
+        app.increment_counter();
+        assert_eq!(app.counter, 1);
+    }
+
+    #[test]
+    fn test_app_decrement_counter() {
+        let mut app = App::default();
+        app.decrement_counter();
+        assert_eq!(app.counter, 0);
+    }
+}