@Test
public void testCalcIndex() {
assertEquals(0, board.calcIndex(0, 0));
assertEquals(25, board.calcIndex(1, 0));
assertEquals(624, board.calcIndex(NUM_ROWS - 1, NUM_COLUMNS - 1));
assertEquals(NUM_COLUMNS - 1, board.calcIndex(0, NUM_COLUMNS - 1));
assertEquals(600, board.calcIndex(NUM_ROWS - 1, 0));
assertEquals(312, board.calcIndex(12, 12));
assertEquals(520, board.calcIndex(20, 20));
}
