@Test
public void LeftGetNextPositionTest() {
BoardModel boardModel = BoardModel.initialize();
int currentPosition = boardModel.getPositionOfEmptySlot();
int nextPosition = Left.getInstance().getNextPosition(boardModel);
assertTrue(nextPosition == currentPosition - 1);
}
@Test
public void UpGetNextPositionTest() {
BoardModel boardModel = BoardModel.initialize();
int currentPosition = boardModel.getPositionOfEmptySlot();
int numberOfSlotsInARow = boardModel.getNumberOfSlotsInARow();
int nextPosition = Up.getInstance().getNextPosition(boardModel);
assertTrue(nextPosition == currentPosition - numberOfSlotsInARow);
}