add Thermometer and PowerSocket structs and Device enum

smart-house/src/power_socket.rs

@@ -0,0 +1,56 @@
+#![allow(unused)]
+
+use std::fmt::Display;
+
+pub struct PowerSocket {
+    power_rate: f32,
+    on: bool,
+}
+
+impl PowerSocket {
+    pub fn new(power_rate: f32, on: bool) -> Self {
+        Self { power_rate, on }
+    }
+
+    pub fn is_on(&self) -> bool {
+        self.on
+    }
+
+    pub fn set_on(&mut self, on: bool) {
+        self.on = on
+    }
+
+    pub fn get_power(&self) -> f32 {
+        if self.on { self.power_rate } else { 0.0 }
+    }
+
+    pub fn display(&self) -> impl Display {
+        let state = if self.is_on() { "ON" } else { "OFF" };
+        format!("PowerSocket[ {} : {:02.1} ]", state, self.get_power())
+    }
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn smoke_test() {
+        let mut power_socket = PowerSocket::new(12.4, false);
+        assert_eq!(power_socket.power_rate, 12.4);
+        assert!(!power_socket.on);
+        assert!(!power_socket.is_on());
+        assert_eq!(power_socket.get_power(), 0.0);
+
+        power_socket.set_on(true);
+        assert!(power_socket.is_on());
+        assert_eq!(power_socket.get_power(), 12.4);
+    }
+
+    #[test]
+    fn display_test() {
+        assert_eq!(format!("{}", PowerSocket::new(11.549, false).display()), "PowerSocket[ OFF : 0.0 ]");
+        assert_eq!(format!("{}", PowerSocket::new(11.549, true).display()), "PowerSocket[ ON : 11.5 ]");
+        assert_eq!(format!("{}", PowerSocket::new(11.550, true).display()), "PowerSocket[ ON : 11.6 ]");
+    }
+}