public async Task DeleteBookById_OK()
        {
            //Arrange
            var entity = Create <BookEntity>(x =>
            {
                x.BookId = Math.Abs(Guid.NewGuid().GetHashCode());
            });

            //Act
            using (var _context = new LibraryContextMemory(_configuration))
            {
                var libraryRepository = new LibraryRepository(_context);
                var result            = await libraryRepository.DeleteBookById(entity.BookId);

                // Assert
                result.Should().NotBeNull("Must contain a result");
                result.BookId.Equals(110);
            }
        }