public void Ctor_Sets_PostPerPage_Property_To_postsPerPage_parameter_AND_BlogPostRepository_Property_To_blogPostRepostitoryParameter()
{
const int PostsPerPage = 2;
var mockedBlogPostRepository = new Mock<IBlogPostRepository>();
var pager = new BlogPostPager(PostsPerPage, mockedBlogPostRepository.Object);
pager.PostsPerPage.ShouldEqual(PostsPerPage);
pager.BlogPostRepository.ShouldEqual(mockedBlogPostRepository.Object);
}
public void FetchForPage_GIVEN_BlogPostRepository_Has_2_Posts_And_PostsPerPage_Is_1_WHEN_pageNumber_Is_1_THEN_Returns_1_BlogPost()
{
const int PostsPerPage = 1;
const int NumberOfPosts = 2;
const int PageNumber = 1;
var mockedBlogPostRepository = CreateMockedBlogPostRepository(NumberOfPosts);
var pager = new BlogPostPager(PostsPerPage, mockedBlogPostRepository.Object);
IEnumerable<BlogPost> posts = pager.FetchForPage(PageNumber);
posts.Count().ShouldEqual(PostsPerPage);
}
public void FetchForPage_GIVEN_BlogPostRepository_Has_2_Posts_And_PostsPerPage_Is_1_WHEN_pageNumber_Is_1_THEN_Calls_BlogPostRepository_GetPosts_With_numberToSkip_As_0_numberToTake_As_1()
{
const int PostsPerPage = 1;
const int NumberOfPosts = 2;
const int PageNumber = 1;
const int ExpectedNumSkip = 0;
const int ExpectedNumTake = 1;
Expression<Action<IBlogPostRepository>> verifiableAction = r => r.GetPosts(ExpectedNumSkip, ExpectedNumTake, It.IsAny<IEnumerable<string>>());
var mockedBlogPostRepository = CreateMockedBlogPostRepository(NumberOfPosts);
mockedBlogPostRepository.Setup(verifiableAction).Verifiable();
var pager = new BlogPostPager(PostsPerPage, mockedBlogPostRepository.Object);
pager.FetchForPage(PageNumber);
mockedBlogPostRepository.Verify(verifiableAction, Times.Once());
}
public void PageCount_GIVEN_BlogPostRepository_Has_2_Posts_And_Posts_Per_Page_Is_2_THEN_Returns_1()
{
const int PostsPerPage = 2;
const int NumberOfPosts = 2;
var mockedBlogPostRepository = CreateMockedBlogPostRepository(NumberOfPosts);
var pager = new BlogPostPager(PostsPerPage, mockedBlogPostRepository.Object);
pager.PageCount.ShouldEqual(1);
}
public void FetchForPage_WHEN_No_Tags_THEN_Calls_BlogPostRepository_GetPosts_With_EmptyList_Of_Tags()
{
IEnumerable<string> tagsPassedToPosts = new string[0];
var mockedBlogPostRepository = CreateMockedBlogPostRepository(1);
mockedBlogPostRepository.Setup(r => r.GetPosts(It.IsAny<int>(), It.IsAny<int>(), It.IsAny<IEnumerable<string>>()))
.Callback<int, int, IEnumerable<string>>((skip, take, tags) => tagsPassedToPosts = tags);
var pager = new BlogPostPager(1, mockedBlogPostRepository.Object);
IEnumerable<BlogPost> posts = pager.FetchForPage(1, null);
tagsPassedToPosts.Count().ShouldEqual(0);
}
public void FetchForPage_GIVEN_BlogPostRepository_Has_2_Posts_And_PostsPerPage_Is_1_WHEN_pageNumber_Is_3_THEN_Does_Not_Call_BlogPostRepository_GetPosts()
{
const int PostsPerPage = 1;
const int NumberOfPosts = 2;
const int PageNumber = 3;
Expression<Action<IBlogPostRepository>> verifiableAction = r => r.GetPosts(It.IsAny<int>(), It.IsAny<int>(), It.IsAny<IEnumerable<string>>());
var mockedBlogPostRepository = CreateMockedBlogPostRepository(NumberOfPosts);
mockedBlogPostRepository.Setup(verifiableAction).Verifiable();
var pager = new BlogPostPager(PostsPerPage, mockedBlogPostRepository.Object);
pager.FetchForPage(PageNumber);
mockedBlogPostRepository.Verify(verifiableAction, Times.Never());
}
