refactor draw

app/src/main/java/chess/controller/CommandExecutor.java

@@ -59,11 +59,7 @@ public class CommandExecutor {
 	}
 
 	private void switchPlayerTurn() {
-		if(this.game.switchPlayerTurn()) {
-			this.dispatcher.onDraw();
-			this.dispatcher.onGameEnd();
-			return;
-		}
+		this.game.switchPlayerTurn();
 		this.dispatcher.onPlayerTurn(this.game.getPlayerTurn());
 	}
 
@@ -75,6 +71,9 @@ public class CommandExecutor {
 		GameStatus gameStatus = this.game.checkGameStatus();
 
 		switch (gameStatus) {
+			case Draw:
+				this.dispatcher.onDraw();
+				return true;
 			case Check:
 				this.dispatcher.onKingInCheck();
 				return false;