update

src/main/java/PingPong/CollisionChecker.java

@@ -13,4 +13,8 @@ public class CollisionChecker {
     public Boolean didTouchLeftEdge(Integer ballXCoordinate) {
         return ballXCoordinate <= 0;
     }
+    public Boolean didTouchRightEdge(Integer ballXCoordinate, Integer maxWidth) {
+        return ballXCoordinate >= maxWidth;
+    }
+
 }