Opc.Ua.ServerTest.SubscribeTest.VerifyKeepAliveTestResults C# (CSharp) Method

        private bool VerifyKeepAliveTestResults(Subscription subscription)
        {
            if (subscription.Failed)
            {
                return false;
            }

            if (subscription.MissingSequenceNumbers.Count > 0)
            {
                Log(
                    "Missing messages for subscription. SubscriptionId = {0}, Last = {1}, Missing = {2}",
                    subscription.SubscriptionId,
                    subscription.LastReceivedSequenceNumber,
                    new Variant(subscription.MissingSequenceNumbers));

                return false;
            }

            if (subscription.NextExpectedSequenceNumber != subscription.LastReceivedSequenceNumber+1)
            {
                Log(
                    "Missing messages for subscription. SubscriptionId = {0}, Actual = {1}, Expected = {2}", 
                    subscription.SubscriptionId,
                    subscription.LastReceivedSequenceNumber,
                    subscription.NextExpectedSequenceNumber);

                return false;
            }

            if (subscription.NotificationMessages.Count > 0)
            {
                Log(
                    "Received unexpected notification messages for subscription {0}. Count = {1}", 
                    subscription.SubscriptionId,
                    subscription.NotificationMessages.Count);

                return false;
            }

            bool success = true;

            for (int ii = 0; ii < subscription.States.Count; ii++)
            {
                if (!VerifyKeepAliveTestResults(subscription, subscription.States[ii], ii == 0))
                {
                    success = false;
                }
            }

            return success;
        }