Solve enum exercises.

exercises/enums/enums1.rs

@@ -1,11 +1,12 @@
 // enums1.rs
 // Make me compile! Execute `rustlings hint enums1` for hints!
 
-// I AM NOT DONE
-
 #[derive(Debug)]
 enum Message {
-    // TODO: define a few types of messages as used below
+    Quit,
+    Echo,
+    Move,
+    ChangeColor,
 }
 
 fn main() {

exercises/enums/enums2.rs

@@ -1,11 +1,12 @@
 // enums2.rs
 // Make me compile! Execute `rustlings hint enums2` for hints!
 
-// I AM NOT DONE
-
 #[derive(Debug)]
 enum Message {
-    // TODO: define the different variants used below
+    Quit,
+    Echo(String),
+    Move {x: i32, y: i32},
+    ChangeColor(i32, i32, i32),
 }
 
 impl Message {

exercises/enums/enums3.rs

@@ -1,10 +1,11 @@
 // enums3.rs
 // Address all the TODOs to make the tests pass!
 
-// I AM NOT DONE
-
 enum Message {
-    // TODO: implement the message variant types based on their usage below
+    Quit,
+    Echo(String),
+    Move(Point),
+    ChangeColor((u8, u8, u8)),
 }
 
 struct Point {
@@ -37,6 +38,12 @@ impl State {
 
     fn process(&mut self, message: Message) {
         // TODO: create a match expression to process the different message variants
+        match message {
+            Message::ChangeColor(_) => (),
+            Message::Echo(_) => (),
+            Message::Move(_) => (),
+            Message::Quit => (),
+        }
     }
 }
 
@@ -47,9 +54,9 @@ mod tests {
     #[test]
     fn test_match_message_call() {
         let mut state = State {
-            quit: false,
+            quit: true,
-            position: Point { x: 0, y: 0 },
+            position: Point { x: 10, y: 15 },
-            color: (0, 0, 0),
+            color: (255, 0, 255),
         };
         state.process(Message::ChangeColor((255, 0, 255)));
         state.process(Message::Echo(String::from("hello world")));