/**
* Tests the swap method by swapping two gems and checking if their position has changed. Also, it
* checks whether the gems are not changed if they are not next to each other.
*/
@Test
public final void testSwap() {
board = new Board(2, 0, 0, false);
assertFalse(board.swap(0, 1, 1, 0));
gems = board.getGems();
Gem gem1 = gems[0][0];
Gem gem2 = gems[0][1];
assertTrue(board.swap(0, 0, 0, 1));
assertEquals(gems[0][0], gem2);
assertEquals(gems[0][1], gem1);
assertTrue(board.swap(0, 0, 1, 0));
}
