ITStorageTest.testCopyBlob:683 » Storage 400 Bad Request
Caused by: com.google.api.client.googleapis.json.GoogleJsonResponseException: 
400 Bad Request
No file found in request.

String sourceBlobName = "test-copy-blob-source";
BlobId source = BlobId.of(BUCKET, sourceBlobName);
ImmutableMap<String, String> metadata = ImmutableMap.of("k", "v");
BlobInfo blob = BlobInfo.builder(source)
    .contentType(CONTENT_TYPE)
    .metadata(metadata)
    .build();
Blob remoteBlob = storage.create(blob, BLOB_BYTE_CONTENT);
assertNotNull(remoteBlob);
String targetBlobName = "test-copy-blob-target";
Storage.CopyRequest req = Storage.CopyRequest.of(source, BlobId.of(BUCKET, targetBlobName));
CopyWriter copyWriter = storage.copy(req); // Exception thrown here