private RestRequest createRestRequestForPutOperation() throws Exception {
    JSONObject header = new JSONObject();
    header.put(MockRestRequest.REST_METHOD_KEY, RestMethod.POST.name());
    header.put(MockRestRequest.URI_KEY, "/");
    return new MockRestRequest(header, null);
  }
Test get blob chunk Ids for composite blob.
@throws Exception
ambry-router/src/test/java/com/github/ambry/router/NonBlockingRouterTest.java