### Question:
AlbumHandler { @Operation(httpMethods = "GET") public Future<?> get(SocialRequestItem request) throws ProtocolException { Set<UserId> userIds = request.getUsers(); Set<String> optionalAlbumIds = ImmutableSet.copyOf(request .getListParameter("albumId")); HandlerPreconditions.requireNotEmpty(userIds, "No userId specified"); if (userIds.size() > 1 && !optionalAlbumIds.isEmpty()) { throw new IllegalArgumentException("Cannot fetch same albumIds for multiple userIds"); } if (!optionalAlbumIds.isEmpty()) { if (optionalAlbumIds.size() == 1) { return service.getAlbum(Iterables.getOnlyElement(userIds), request.getAppId(), request.getFields(), optionalAlbumIds.iterator().next(), request.getToken()); } else { return service.getAlbums(Iterables.getOnlyElement(userIds), request.getAppId(), request.getFields(), collectionOptionsFactory.create(request), optionalAlbumIds, request.getToken()); } } return service.getAlbums(userIds, request.getGroup(), request .getAppId(), request.getFields(), collectionOptionsFactory.create(request), request.getToken()); } @Inject  AlbumHandler(
      AlbumService service, ContainerConfig config,
      CollectionOptionsFactory collectionOptionsFactory); @Operation(httpMethods = "POST", bodyParam = "album") Future<?> create(SocialRequestItem request); @Operation(httpMethods = "GET") Future<?> get(SocialRequestItem request); @Operation(httpMethods = "PUT", bodyParam = "album") Future<?> update(SocialRequestItem request); @Operation(httpMethods = "DELETE") Future<?> delete(SocialRequestItem request); @Operation(httpMethods = "GET", path = "/@supportedFields") List<Object> supportedFields(RequestItem request);  }### Answer:
@Test public void testGet() throws Exception { }