Local blobstore upload test

[Burtan]

Hi,
you have provided an example how to test blobstore serving locally.
https://github.com/GoogleCloudPlatform/appengine-gcs-client/blob/master/java/src/test/java/com/google/appengine/tools/cloudstorage/TestServingViaBlobstoreApi.java
Is it also possible to test blobstore upload locally? The url generated by the following code is not reachable:

UploadOptions options = UploadOptions.Builder.withGoogleStorageBucketName("param");
String urlRoot = "/blob/upload/" + String.valueOf(param);
String blobUploadUrl = BlobstoreServiceFactory.getBlobstoreService()
        .createUploadUrl(urlRoot, options);