Added ability to change player mid game

Author: ben_singer

ktaf/src/main/kotlin/com/github/benpollarduk/ktaf/logic/Game.kt

@@ -31,7 +31,7 @@ import com.github.benpollarduk.ktaf.rendering.frames.Frame
  */
 public class Game(
     public val information: GameInformation,
-    public val player: PlayableCharacter,
+    initialPlayer: PlayableCharacter,
     public val overworld: Overworld,
     private val completionCondition: EndCheck,
     private val gameOverCondition: EndCheck,
@@ -49,6 +49,12 @@ public class Game(
         information.author
     )
 
+    /**
+     * The current [PlayableCharacter].
+     */
+    public var player: PlayableCharacter
+        private set
+
     /**
      * The active [Converser].
      */
@@ -65,6 +71,10 @@ public class Game(
      */
     public var sceneMapKeyType: KeyType = KeyType.DYNAMIC
 
+    init {
+        player = initialPlayer
+    }
+
     /**
      * Display a transition frame with a specified [title] and [message].
      */
@@ -341,6 +351,13 @@ public class Game(
         state = GameState.FINISHED
     }
 
+    /**
+     * Change to a specified [player].
+     */
+    public fun changePlayer(player: PlayableCharacter) {
+        this.player = player
+    }
+
     private fun getFallbackFrame(): Frame {
         return ioConfiguration.frameBuilders.transitionFrameBuilder.build(
             "Error",

ktaf/src/test/kotlin/com/github/benpollarduk/ktaf/logic/GameTest.kt

@@ -223,4 +223,27 @@ class GameTest {
             game.displayTransition("Title", "Message")
         }
     }
+
+    @Test
+    fun `given change player when player2 then player is player2`() {
+// Given
+        val player = PlayableCharacter("TestPlayer", "")
+        val player2 = PlayableCharacter("TestPlayer", "")
+        val regionMaker = RegionMaker("TestRegion", "")
+        regionMaker[0, 0, 0] = Room("TestRoom", "")
+        val overworldMaker = OverworldMaker("TestOverworld", "", listOf(regionMaker))
+        val game = Game(
+            GameInformation("", "", "", ""),
+            player,
+            overworldMaker.make(),
+            { EndCheckResult.notEnded },
+            { EndCheckResult.notEnded }
+        )
+
+        // When
+        game.changePlayer(player2)
+
+        // Then
+        Assertions.assertEquals(player2, game.player)
+    }
 }