R: Heading.turnRight()

TECHDEBT.md

@@ -7,7 +7,7 @@
 - [ ] Clean up constants and private fields
   - [ ] Move move() into Heading.move(Position)
   - [ ] Move turnLeft() into Heading.turnLeft()
-  - [ ] Move turnRight() into Heading.turnRight()
+  - [x] Move turnRight() into Heading.turnRight()
     - [x] Remove HEADING_* constants
       - [x] in move() compare to heading enum
       - [x] in turnRight() compare to heading enum

src/main/kotlin/org/example/Heading.kt

@@ -7,6 +7,13 @@ enum class Heading(val symbol: Char) {
     WEST('W'),
     ;
 
+    fun turnRight() = when (this) {
+        EAST -> SOUTH
+        SOUTH -> WEST
+        WEST -> NORTH
+        NORTH -> EAST
+    }
+
     override fun toString(): String = symbol.toString()
 
     companion object {

src/main/kotlin/org/example/Rover.kt

@@ -30,12 +30,7 @@ class Rover {
     }
 
     private fun turnRight() {
-        when (state.heading) {
-            Heading.EAST -> state.heading = Heading.SOUTH
-            Heading.SOUTH -> state.heading = Heading.WEST
-            Heading.WEST -> state.heading = Heading.NORTH
-            Heading.NORTH -> state.heading = Heading.EAST
-        }
+        state.heading = state.heading.turnRight()
     }
 
     private fun turnLeft() {