public void RetrievePreviousComicPageId_WhenTwoPagesAndOnFirstPage_ReturnsCurrentPage()
{
Guid firstPageId = new Guid("66c4eff1-d7d6-44f4-b162-c71784aa162f");
Guid secondPageId = new Guid("07ddadef-831a-4c42-8caf-0ea140aeff12");
IEnumerable <ComicPage> comicPages = new List <ComicPage>
{
new ComicPage()
{
PageId = firstPageId,
IssueId = 1,
PageNumber = 1,
FileName = "01.jpg"
},
new ComicPage()
{
PageId = secondPageId,
IssueId = 1,
PageNumber = 2,
FileName = "02.jpg"
}
};
Mock <IComicIssuePageRetriever> mockComicIssuePageRetriever = new Mock <IComicIssuePageRetriever>();
mockComicIssuePageRetriever.Setup(cipr => cipr.RetrieveComicPagesForIssue(It.IsAny <int>())).Returns(comicPages);
PreviousComicPageIdRetriever previousComicPageIdRetriever = new PreviousComicPageIdRetriever(mockComicIssuePageRetriever.Object);
Guid previousComicPageId = previousComicPageIdRetriever.RetrievePreviousComicPageId(firstPageId);
Assert.That(previousComicPageId.ToString(), Is.EqualTo(firstPageId.ToString()));
}
public void RetrievePreviousComicPageId_PageCannotBeFound_ThrowsArgumentException()
{
Guid firstPageId = new Guid("66c4eff1-d7d6-44f4-b162-c71784aa162f");
Guid secondPageId = new Guid("07ddadef-831a-4c42-8caf-0ea140aeff12");
IEnumerable <ComicPage> comicPages = new List <ComicPage>
{
new ComicPage()
{
PageId = firstPageId,
IssueId = 1,
PageNumber = 1,
FileName = "01.jpg"
},
new ComicPage()
{
PageId = secondPageId,
IssueId = 1,
PageNumber = 2,
FileName = "02.jpg"
}
};
Mock <IComicIssuePageRetriever> mockComicIssuePageRetriever = new Mock <IComicIssuePageRetriever>();
mockComicIssuePageRetriever.Setup(cipr => cipr.RetrieveComicPagesForIssue(It.IsAny <int>())).Returns(comicPages);
PreviousComicPageIdRetriever nextComicPageIdRetriever = new PreviousComicPageIdRetriever(mockComicIssuePageRetriever.Object);
Guid notIncludedPageId = new Guid("2542fae4-9795-4215-9459-c6928ac3380e");
Assert.Throws <ArgumentException>(() => nextComicPageIdRetriever.RetrievePreviousComicPageId(notIncludedPageId));
}
