/*
using Model;
using Model.Group;
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace MyStub
{
    public class MyStub : ILibraryManager
    {

        private readonly StubAuthor StubAuthor;

        public MyStub()
        {

        }

        public Task<Author> GetAuthorById(string id)
        {
            throw new NotImplementedException();
        }

        public Task<Tuple<long, IEnumerable<Author>>> GetAuthorsByName(string substring, int index, int count, string sort = "")
        {
            throw new NotImplementedException();
        }

        public Task<Book> GetBookById(string id)
        {
            throw new NotImplementedException();
        }

        public Task<Book> GetBookByISBN(string isbn)
        {
            throw new NotImplementedException();
        }

        public Task<Tuple<long, IEnumerable<Book>>> GetBooksByAuthor(string author, int index, int count, string sort = "")
        {

            return StubAuthor.GroupByAuthor; 
        }

        public Task<Tuple<long, IEnumerable<Book>>> GetBooksByAuthorId(string authorId, int index, int count, string sort = "")
        {
            throw new NotImplementedException();
        }

        public Task<Tuple<long, IEnumerable<Book>>> GetBooksByTitle(string title, int index, int count, string sort = "")
        {
            throw new NotImplementedException();
        }

    }
}
*/