tictactoe: added method to switch player

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

@@ -13,6 +13,7 @@ public class GameLogic implements ActionListener {
 	private static final char PLAYER_2 = 'o';
 	private char[][] board;
 	private final char[] occupiedFields = { PLAYER_1, PLAYER_2 };
+	private char currentPlayer = PLAYER_1;
 	
 	private JButton[][] fields;
 	private JPanel contentPanel;
@@ -105,8 +106,13 @@ public class GameLogic implements ActionListener {
 	}
 	
 	public char getCurrentPlayer() {
-		return 'x';
+		return this.currentPlayer;
 	}
+	
+	public void switchPlayer() {
+		this.currentPlayer = this.currentPlayer == PLAYER_1 ? PLAYER_2 : PLAYER_1;
+	}
+
 
 	public JPanel generateGUI() {
 		this.fields = new JButton[this.board.length][this.board.length];
@@ -137,5 +143,5 @@ public class GameLogic implements ActionListener {
 			}
 		}
 	}
-
+	
 }

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

@@ -89,6 +89,16 @@ class GameLogicTest {
 		assertEquals(expectedResult, realResult);
 	}
 	
+	@Test
+	void switchPlayerTest() {
+		game.switchPlayer();
+		
+		char expectedResult = game.getCurrentPlayer();
+		char realResult = 'o';
+
+		assertEquals(expectedResult, realResult);
+	}
+	
 	 @ParameterizedTest(name = "[{index}] {0} -> {2} fields")
 	 @MethodSource("testCasesForCountPlayfields")
 	 void fieldCountTest(String testName, int size, int expectedResult) {