public void WhenPageRangeRequested_ItsDataIsReturned(PageRangeDto pageRange, int expectedCardsCount)
{
var sut = new CardsInfoRetriever();
var maxPageProvider = Mock.Of <IMaxPageProvider>(provider => provider.GetMaxPage() == 3);
var cardDetailsFetcher = Mock.Of <ICardDetailsFetcher>(fetcher => fetcher.GetCardDetails(1) == new List <CardInfoDto> {
new CardInfoDto(), new CardInfoDto()
} &&
fetcher.GetCardDetails(2) == new List <CardInfoDto> {
new CardInfoDto()
} &&
fetcher.GetCardDetails(3) == new List <CardInfoDto> {
new CardInfoDto(), new CardInfoDto(), new CardInfoDto()
});
Assert.AreEqual(expectedCardsCount, sut.GetCardsInfo(maxPageProvider, cardDetailsFetcher, pageRange).Count);
}
public List <CardInfoDto> GetCardsInfo(IMaxPageProvider maxPageProvider, ICardDetailsFetcher cardDetailsFetcher, PageRangeDto pageRange)
{
if (maxPageProvider == null)
{
throw new ArgumentNullException(nameof(maxPageProvider));
}
if (cardDetailsFetcher == null)
{
throw new ArgumentNullException(nameof(cardDetailsFetcher));
}
if (pageRange == null)
{
throw new ArgumentNullException(nameof(pageRange));
}
int actualMaxPage = maxPageProvider.GetMaxPage();
int minRange = pageRange.Min.HasValue && pageRange.Min.Value >= MinPage ? pageRange.Min.Value : MinPage;
int maxRange = pageRange.Max.HasValue && pageRange.Max.Value <= actualMaxPage ? pageRange.Max.Value : actualMaxPage;
var cards = new List <CardInfoDto>();
for (int pageNumber = minRange; pageNumber <= maxRange; pageNumber++)
{
cards.AddRange(cardDetailsFetcher.GetCardDetails(pageNumber));
}
return(cards);
}
