正しくソートされることを確認するテスト

[chikowaka]

誰が　　　：
何をしたい：

テスト要件
前提条件　：
手順　　　：
入力値　　：
期待する値：

[ushmz]

subsuke/lib/blocs/subscription_item_bloc.dart

Lines 35 to 45 in c734f9f

	final _sortCondition = BehaviorSubject.seeded(ItemSortCondition.None);
	Stream<ItemSortCondition> get sortConditionStream => _sortCondition.stream;
	Function(ItemSortCondition) get setSortCondition => _sortCondition.sink.add;
	ItemSortCondition getSortCondition() {
	return _sortCondition.stream.value;
	}
	final _itemController = BehaviorSubject<List<SubscriptionItem>>();
	Stream<List<SubscriptionItem>> get itemStream =>
	_itemController.stream.transform(itemFilter()).transform(itemSort());

subsuke/lib/blocs/subscription_item_bloc.dart

Lines 62 to 81 in c734f9f

	ItemStreamTransformer itemSort() {
	return StreamTransformer.fromHandlers(handleData: ((data, sink) {
	final sortCondition = _sortCondition.value;
	data.sort(((a, b) {
	switch (sortCondition) {
	case ItemSortCondition.None:
	return 1;
	case ItemSortCondition.PriceASC:
	return a.price.compareTo(b.price);
	case ItemSortCondition.PriceDESC:
	return a.price.compareTo(b.price) * -1;
	case ItemSortCondition.NextASC:
	return a.next.compareTo(b.next);
	case ItemSortCondition.NextDESC:
	return a.next.compareTo(b.next) * -1;
	}
	}));
	sink.add(data);
	}));
	}