@Override
    public RecoverableFsDataOutputStream open(Path path) throws IOException {
        LOGGER.trace("Opening output stream for path {}", path);
        Preconditions.checkNotNull(path);

        GSBlobIdentifier finalBlobIdentifier = BlobUtils.parseUri(path.toUri());
        return new GSRecoverableFsDataOutputStream(storage, options, finalBlobIdentifier);
    }
@Test
    public void testOpen() throws IOException {
        Path path = new Path("gs://foo/bar");
        GSRecoverableFsDataOutputStream stream =
                (GSRecoverableFsDataOutputStream) writer.open(path);
        assertNotNull(stream);
    }