tictactoe: added setter for playfield and changed internal board datatype to char

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

@@ -2,16 +2,22 @@ package de.tims.tictactoe;
 
 public class GameLogic {
 	
-	private int[][] board;
+	private char[][] board;
 
 	public GameLogic(int size) {
 		if (size < 3) {
 			size = 3;
 		}
-		this.board = new int[size][size];
+		this.board = new char[size][size];
+		
+		for (int i = 0; i < this.board.length; i++) {
+			for (int j = 0; j < this.board[0].length; j++) {
+				this.setField(i, j, '-');
+			}
+		}
 	}
 
-	public int[][] getBoard() {
+	public char[][] getBoard() {
 		return this.board;
 	}
 
@@ -19,4 +25,8 @@ public class GameLogic {
 		return this.board[0].length * this.board.length;
 	}
 
+	public void setField(int row, int column, char player) {
+		this.board[row][column] = player;
+	}
+
 }

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

@@ -3,6 +3,7 @@ package de.tims.tictactoe;
 import static org.junit.jupiter.api.Assertions.assertArrayEquals;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
+import java.util.Arrays;
 import java.util.stream.Stream;
 
 import org.junit.jupiter.api.BeforeAll;
@@ -35,8 +36,10 @@ class GameLogicTest {
 	
 	@Test
 	void getBoardTest() {
-		int[][] expectedResult = new int[3][3];
-		int[][] realResult = this.game.getBoard();
+		char[][] expectedResult = new char[][]{{'-', '-', '-'}, 
+											   {'-', '-', '-'},
+											   {'-', '-', '-'}};
+		char[][] realResult = this.game.getBoard();
 
 		assertArrayEquals(expectedResult, realResult);
 	}
@@ -50,6 +53,15 @@ class GameLogicTest {
 			assertEquals(expectedResult, realResult);
 	 }
 	 
+	 @ParameterizedTest(name = "[{index}] {0}")
+	 @MethodSource("testCasesForSetField")
+	 void setFieldTest(String testName, int row, int column, char player, char[][] expectedResult) {
+		 	this.game.setField(row, column, player);
+			char[][] realResult = this.game.getBoard();
+			
+			assertArrayEquals(expectedResult, realResult);
+	 }
+	 
 	 private static Stream<Arguments> testCasesForCountPlayfields() {
 		    return Stream.of(
 		    			Arguments.of("1x1 board with too few fields", 1, 9),
@@ -60,4 +72,13 @@ class GameLogicTest {
 		    		);
 	 }
 	 
+	 private static Stream<Arguments> testCasesForSetField() {
+		    return Stream.of(
+		    			Arguments.of("set field [0][0] for player 1", 0, 0, 'x', new char[][] 
+								    											 {{'x', '-', '-'}, 
+								    											  {'-', '-', '-'},
+								    											  {'-', '-', '-'}})
+		    		);
+	 }
+		
 }