public async Task Test_No_Next_Comic_When_Current_Is_Last()
{
//Arrange
int mockId = 1000;
int?nextValidId = null;
var mockComicApi = new Mock <IXKCDApi>();
mockComicApi.Setup(api => api.GetFirstComicId())
.ReturnsAsync(GetValidMockedFirstComicId());
mockComicApi.Setup(api => api.GetComicOfTheDay())
.ReturnsAsync(GetValidMockedComicOfTheDay());
mockComicApi.Setup(api => api.GetComicById(nextValidId ?? default))
.ReturnsAsync(GetInvalidComic());
var comicRepository = new ComicRepository(mockComicApi.Object);
//Act
var result = await comicRepository.GetNextComicId(mockId);
var nextComic = await comicRepository.GetComicById(nextValidId ?? default);
var lastComicId = await comicRepository.GetLastComicId();
//Assert
Assert.Null(result);
Assert.Equal(nextValidId, result);
Assert.Null(nextComic);
Assert.Equal(lastComicId, mockId);
}
