update testLongestRoad

src/ch/zhaw/catan/SiedlerBoard.java

@@ -185,6 +185,11 @@ public class SiedlerBoard extends HexBoard<Config.Land, Settlement, Road, String
         return longestRoadFaction;
     }
 
+    //todo javadoc
+    public int getLongestRoadLenth() {
+        return longestRoadLenth;
+    }
+
     /**
      * This method is recursive and adds all roads which belongs to a specific players and stringing together to a HashSet.
      * The length of the HashSet represents the length of the longest Road the player has.