### Question:
LocalSnapshotReader extends SnapshotReader { @Override public String generateURIForCopy() { if (this.addr == null || this.addr.equals(new Endpoint(Utils.IP_ANY, 0))) { LOG.error("Address is not specified"); return null; } if (this.readerId == 0) { final SnapshotFileReader reader = new SnapshotFileReader(this.path, this.snapshotThrottle); reader.setMetaTable(this.metaTable); if (!reader.open()) { LOG.error("Open snapshot {} failed.", this.path); return null; } this.readerId = FileService.getInstance().addReader(reader); if (this.readerId < 0) { LOG.error("Fail to add reader to file_service."); return null; } } return String.format(REMOTE_SNAPSHOT_URI_SCHEME + "%s/%d", this.addr.toString(), this.readerId); } LocalSnapshotReader(LocalSnapshotStorage snapshotStorage, SnapshotThrottle snapshotThrottle, Endpoint addr,
                               RaftOptions raftOptions, String path); @Override void close(); @Override boolean init(final Void v); @Override void shutdown(); @Override SnapshotMeta load(); @Override String generateURIForCopy(); @Override String getPath(); @Override Set<String> listFiles(); @Override Message getFileMeta(final String fileName);  }### Answer:
@Test public void testGenerateUriForCopy() throws Exception { final String uri = this.reader.generateURIForCopy(); assertNotNull(uri); assertTrue(uri.startsWith("remote: final long readerId = Long.valueOf(uri.substring("remote: assertTrue(FileService.getInstance().removeReader(readerId)); }