public void GetLoansForBookTest2()
        {
            int bookId     = 1;
            var controller = new LoansController(_entityMock.Object);
            var result     = controller.GetLoansForBook(bookId);

            var objectResult = Assert.IsType <OkObjectResult>(result);
            var model        = Assert.IsAssignableFrom <IEnumerable <LoanDTO> >(objectResult.Value);

            Assert.Equal(_loanDTOs.Where(l => l.Tome.BookId == 1), model); //1 ilyen kölcsönzés van, és itt nem kell dátum miatt törölni
        }
        public void GetLoansForBookTest()
        {
            int bookId     = 2; // ehhez van egy kötet és arra van két kölcsönzés
            var controller = new LoansController(_entityMock.Object);
            var result     = controller.GetLoansForBook(bookId);

            var objectResult = Assert.IsType <OkObjectResult>(result);
            var model        = Assert.IsAssignableFrom <IEnumerable <LoanDTO> >(objectResult.Value);

            Assert.Equal(_loanDTOs.Where(l => l.Tome.BookId == 2).Count() - 1, model.Count());
            Assert.Equal(2, model.Count());
        }