public static QuotaManager createDummyQuotaManager() {
    return new QuotaManager() {
      @Override
      public void init() {
      }

      @Override
      public ThrottlingRecommendation recommend(RestRequest restRequest) {
        return null;
      }

      @Override
      public QuotaConfig getQuotaConfig() {
        return new QuotaConfig(new VerifiableProperties(new Properties()));
      }

      @Override
      public QuotaMode getQuotaMode() {
        return null;
      }

      @Override
      public void setQuotaMode(QuotaMode mode) {

      }

      @Override
      public QuotaAction chargeAndRecommend(RestRequest restRequest, Map<QuotaName, Double> requestCostMap, boolean checkQuotaExceedAllowed, boolean forceCharge) {
        return null;
      }

      @Override
      public void shutdown() {

      }
    };
  }
Create a dummy {@link QuotaManager} object, that does nothing, for test.
@return QuotaManager object.
ambry-test-utils/src/main/java/com/github/ambry/quota/QuotaTestUtils.java