private ResponseInfo getResponseInfo(RequestInfo requestInfo) throws IOException {
    NetworkReceive networkReceive = new NetworkReceive(null, mockServer.send(requestInfo.getRequest()), time);
    return new ResponseInfo(requestInfo, null, networkReceive.getReceivedBytes().content());
  }
Get the {@link ResponseInfo} for the given {@link RequestInfo} using the {@link MockServer}
@param requestInfo the {@link RequestInfo} for which the response is to be returned.
@return the {@link ResponseInfo} the response for the request.
@throws IOException if there is an error sending the request.
ambry-router/src/test/java/com/github/ambry/router/PutOperationTest.java