Added isCellInBoard for checking positions with test

src/main/java/Game/ChessObj/ChessBoard.java

@@ -76,6 +76,12 @@ public class ChessBoard {
         return cellSymbol;
     }
 
+    public boolean isCellInBoard(int x, int y){
+        if(x >= 0 && x < board[0].length && y >= 0 && y < board.length)
+            return true;
+        return false;
+    }
+
     public ChessFigure[][] getBoard() {
         return this.board;
     }

src/test/java/Game/ChessObj/ChessBoardTest.java

@@ -66,4 +66,15 @@ class ChessBoardTest {
         };
         assertArrayEquals(expectedArray, chessBoard.getCellSymbols());
     }
+
+    @Test
+    void isCellInBoard() {
+        assertTrue(chessBoard.isCellInBoard(0, 0));
+        assertTrue(chessBoard.isCellInBoard(7, 7));
+        assertTrue(chessBoard.isCellInBoard(2, 1));
+        assertTrue(chessBoard.isCellInBoard(5, 7));
+        assertFalse(chessBoard.isCellInBoard(-1, 0));
+        assertFalse(chessBoard.isCellInBoard(4, 8));
+        assertFalse(chessBoard.isCellInBoard(10, 20));
+    }
 }