try {
boolean exceptionOccured = false;
CNSTopicDeliveryPolicy topicPolicy = new CNSTopicDeliveryPolicy();
JSONObject json = new JSONObject(jsonStr);
topicPolicy.update(json);
assertTrue(topicPolicy != null);
logger.debug("topicPolicy: " + topicPolicy.toString());
CNSRetryPolicy hrp = topicPolicy.getDefaultHealthyRetryPolicy();
assertTrue(hrp.getMinDelayTarget() == 21);