public IEnumerable <CategoryDto> Build(int count) { var fixture = new Fixture(); var cats = fixture.Build <CategoryDto>() .With(c => c.LibraryId, _libraryId) .CreateMany(count); _connection.AddCategories(cats); _categories.AddRange(cats); foreach (var cat in cats) { var author = fixture.Build <AuthorDto>() .With(a => a.LibraryId, _libraryId) .Without(a => a.ImageId) .Create(); _connection.AddAuthor(author); _authors.Add(author); var books = fixture.Build <BookDto>() .With(b => b.LibraryId, _libraryId) .With(b => b.Language, RandomData.Locale) .Without(b => b.ImageId) .Without(b => b.SeriesId) .CreateMany(_bookCount); _connection.AddBooks(books); _connection.AddBooksAuthor(books.Select(b => b.Id), author.Id); _connection.AddBooksToCategory(books, cat); } return(cats); }