tictactoe: refactored board management and added constructor to handle different playfield sizes

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

@@ -2,7 +2,11 @@ package de.tims.tictactoe;
 
 public class GameLogic {
 	
-	private int[][] board = new int[3][3];
+	private int[][] board;
+
+	public GameLogic(int size) {
+		this.board = new int[size][size];
+	}
 
 	public int[][] getBoard() {
 		return this.board;

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

@@ -8,7 +8,8 @@ import org.junit.jupiter.api.Test;
 
 class GameLogicTest {
 
-	private GameLogic game = new GameLogic();
+	private int size = 3;
+	private GameLogic game = new GameLogic(size);
 	
 	@BeforeAll
 	static void setUpBeforeClass() throws Exception {
@@ -21,7 +22,7 @@ class GameLogicTest {
 	@Test
 	void createGameLogicTest() {
 		GameLogic expectedResult = game;
-		GameLogic realResult = new GameLogic();
+		GameLogic realResult = new GameLogic(size);
 		
 		assertEquals(expectedResult.getClass(), realResult.getClass());
 	}