public GetBookDetailsQueryHandler(ILibraryContext context, IBookDetailsMapper mapper)
 {
     _context = context;
     _mapper  = mapper;
 }
 public GetBookDetailsQueryHandlerTests()
 {
     _mapper = new BookDetailsMapper();
     _libraryContextFactory = new InMemoryLibraryContextFactory();
     _libraryContext        = _libraryContextFactory.Create();
 }