@Test
	public void testNumberOfDoorways() 
	{
		int numDoors = 0;
		int totalCells = board.getNumColumns() * board.getNumRows();
		Assert.assertEquals(506, totalCells);
		for (int row=0; row<board.getNumRows(); row++)
			for (int col=0; col<board.getNumColumns(); col++) {
				BoardCell cell = board.getBoardCell(row, col);
				if (cell.isDoorway())
					numDoors++;
			}
		Assert.assertEquals(16, numDoors);
	}