tictactoe: added test case to check end of game with win for player 2

src/main/java/de/tims/tictactoe/GameLogic.java

@@ -90,6 +90,7 @@ public class GameLogic {
 
 	public boolean checkEndOfGame() {
 		if (checkForWin('x')) return true;
+		if (checkForWin('o')) return true;
 		return false;
 	}
 

src/test/java/de/tims/tictactoe/GameLogicTest.java

@@ -230,7 +230,11 @@ class GameLogicTest {
 		    			Arguments.of("end of game with win for player 1", true, new char[][] 
 																				 {{'x', 'o', 'x'}, 
 																				  {'x', 'x', 'o'},
-																				  {'x', 'o', 'o'}})
+																				  {'x', 'o', 'o'}}),
+		    			Arguments.of("end of game with win for player 2", true, new char[][] 
+																				 {{'x', 'x', 'o'}, 
+																				  {'o', 'o', 'o'},
+																				  {'x', 'o', 'x'}})
 		    		);
 	 }