### Question:
Game2048BoardManager implements Serializable { void action(Game2048Layout.Action action) { saveStates(activityContext); game2048ScoreManager.saveScore(getGame2048ScoreManager().calculateScore()); for (int i = 0; i < complexity; i++) { List<Game2048Item> rowList = new ArrayList<>(); for (int j = 0; j < complexity; j++) { int rowIndex = getRowIndexByAction(action, i, j); int colIndex = getColIndexByAction(action, i, j); Game2048Item item = game2048Items[rowIndex][colIndex]; if (item.getNumber() != 0) { rowList.add(item); } } for (int j = 0; j < rowList.size(); j++) { int rowIndex = getRowIndexByAction(action, i, j); int colIndex = getColIndexByAction(action, i, j); Game2048Item item = game2048Items[rowIndex][colIndex]; if (item.getNumber() != rowList.get(j).getNumber()) { isMoveHappen = true; } } mergeItem(rowList); for (int j = 0; j < complexity; j++) { if (rowList.size() > j) { switch (action) { case LEFT: game2048Items[i][j].setNumber(rowList.get(j).getNumber()); break; case RIGHT: game2048Items[i][complexity - 1 - j].setNumber(rowList.get(j).getNumber()); break; case UP: game2048Items[j][i].setNumber(rowList.get(j).getNumber()); break; case DOWN: game2048Items[complexity - 1 - j][i].setNumber(rowList.get(j).getNumber()); break; } } else { switch (action) { case LEFT: game2048Items[i][j].setNumber(0); break; case RIGHT: game2048Items[i][complexity - 1 - j].setNumber(0); break; case UP: game2048Items[j][i].setNumber(0); break; case DOWN: game2048Items[complexity - 1 - j][i].setNumber(0); break; } } } } generateViewAuto(); } Game2048BoardManager(User user, int complexity, Context context); User getUser(); void undo(Context context);  }### Answer:
@Test public void testAction() { initializeBoard(); initializeListener(); testBoardManagerInit(); fillBoardWithZero(); Game2048Layout.Action leftAction = Game2048Layout.Action.LEFT; Game2048Layout.Action rightAction = Game2048Layout.Action.RIGHT; Game2048Layout.Action upAction = Game2048Layout.Action.UP; Game2048Layout.Action downAction = Game2048Layout.Action.DOWN; boardManager.action(leftAction); assertFalse(boardManager.isGameOver()); Game2048Item game2048Item1 = new Game2048Item(context); game2048Item1.setNumber(1024); Game2048Item game2048Item2 = new Game2048Item(context); game2048Item2.setNumber(512); boardManager.setGame2048ItemWithIndex(game2048Item1, 0, 0); boardManager.setGame2048ItemWithIndex(game2048Item2, 0, 1); boardManager.action(rightAction); assertFalse(boardManager.isGameOver()); boardManager.resetSameSizeBoard(); fillBoardWithTwo(); boardManager.action(upAction); boardManager.action(downAction); assertFalse(boardManager.isWinning()); }