Apache.NMS.Policies.RedeliveryPolicy.RedeliveryDelay C# (CSharp) Method

        public virtual int RedeliveryDelay(int redeliveredCounter)
        {
            int delay = 0;

            if(redeliveredCounter == 0)
            {
                // The first time through there is no delay, the Rollback should be immediate.
                return 0;
            }

            if(UseExponentialBackOff && BackOffMultiplier > 1)
            {
                delay = initialRedeliveryDelay * Convert.ToInt32(Math.Pow(BackOffMultiplier, redeliveredCounter - 1));
            }
            else
            {
                delay = InitialRedeliveryDelay;
            }

            if(UseCollisionAvoidance)
            {
                Random random = RandomNumberGenerator;
                double variance = (NextBool ? collisionAvoidanceFactor : collisionAvoidanceFactor *= -1) * random.NextDouble();
                delay += Convert.ToInt32(Convert.ToDouble(delay) * variance);
            }

            return delay;
        }

        public void Executes_redelivery_policy_with_backoff_of_3_enabled_correctly()
        {
            RedeliveryPolicy policy = new RedeliveryPolicy();

            policy.BackOffMultiplier = 3;
            policy.InitialRedeliveryDelay = 3;
            policy.UseExponentialBackOff = true;

            // simulate a retry of 10 times
            Assert.IsTrue(policy.RedeliveryDelay(0) == 0, "redelivery delay not 5 is " + policy.RedeliveryDelay(0));
            Assert.IsTrue(policy.RedeliveryDelay(1) == 3, "redelivery delay not 10 is " + policy.RedeliveryDelay(1));
            Assert.IsTrue(policy.RedeliveryDelay(2) == 9, "redelivery delay not 20 is " + policy.RedeliveryDelay(2));
            Assert.IsTrue(policy.RedeliveryDelay(3) == 27, "redelivery delay not 40 is " + policy.RedeliveryDelay(3));
            Assert.IsTrue(policy.RedeliveryDelay(4) == 81, "redelivery delay not 80 is " + policy.RedeliveryDelay(4));
            Assert.IsTrue(policy.RedeliveryDelay(5) == 243, "redelivery delay not 160 is " + policy.RedeliveryDelay(5));
            Assert.IsTrue(policy.RedeliveryDelay(6) == 729, "redelivery delay not 320 is " + policy.RedeliveryDelay(6));
            Assert.IsTrue(policy.RedeliveryDelay(7) == 2187, "redelivery delay not 640 is " + policy.RedeliveryDelay(7));
            Assert.IsTrue(policy.RedeliveryDelay(8) == 6561, "redelivery delay not 1280 is " + policy.RedeliveryDelay(8));
            Assert.IsTrue(policy.RedeliveryDelay(9) == 19683, "redelivery delay not 2560 is " + policy.RedeliveryDelay(9));
        }