public void GetAllMyBooks()
        {
            var data = new List <MyBook>
            {
                new MyBook {
                    Id = 1, BookId = 1, UserId = 1
                },
                new MyBook {
                    Id = 2, BookId = 2, UserId = 2
                },
                new MyBook {
                    Id = 3, BookId = 3, UserId = 3
                },
            }.AsQueryable();

            var mockSet = new Mock <DbSet <MyBook> >();

            mockSet.As <IQueryable <MyBook> >().Setup(m => m.Provider).Returns(data.Provider);
            mockSet.As <IQueryable <MyBook> >().Setup(m => m.Expression).Returns(data.Expression);
            mockSet.As <IQueryable <MyBook> >().Setup(m => m.ElementType).Returns(data.ElementType);
            mockSet.As <IQueryable <MyBook> >().Setup(m => m.GetEnumerator()).Returns(data.GetEnumerator());

            var mockContext = new Mock <BookContext>();

            mockContext.Setup(m => m.MyBooks).Returns(mockSet.Object);

            var myBookId        = 1;
            var service         = new MyBookService(mockContext.Object);
            var bookFound       = service.GetById(myBookId);
            var excpectedResult = data.Where(mb => mb.Id == myBookId).FirstOrDefault();

            Assert.AreEqual(excpectedResult.UserId, bookFound.UserId);
        }