public void test_copy() {
        // for copy to work, the contents of the board need to be the same
        // but the actual references cannot be the same (i.e. we created a new
        // board in memory)
        SnakeBoard boardCopy = BOARD_START.copy();
        assertNotSame(BOARD_START, boardCopy);
        char[][] copyGrid = boardCopy.getGrid();
        char[][] origGrid = BOARD_START.getGrid();
        assertNotSame(origGrid, copyGrid);
        for (int row = 0; row < copyGrid.length; row++) {
            assertNotSame(origGrid[row], copyGrid[row]);
            for (int col = 0; col < copyGrid[row].length; col++) {
                assertEquals(origGrid[row][col], copyGrid[row][col]);
            }
        }
    }
 public static void main(String[] args) {
        System.out.println(BASIC.toString());
        System.out.println(BASIC_2.toString());
        System.out.println(BASIC_3.toString());
        System.out.println(BASIC_4.toString());
        System.out.println(BASIC_5.toString());
    }