@Test
    public void test_removeAllPawns(){
        assertNotNull(board);

        assertEquals(numberOfPawns, board.numberOfPawns());
        Pawn pawn1 = new Pawn('l', 3,4, board);
        Pawn pawn2 = new Pawn('m', 2,3, board);
        board.addPawn(pawn1);
        board.addPawn(pawn2);

        board.removeAllPawns();
        assertEquals(board.numberOfPawns(), 0);


    }