public void testTimeout()
        {
            MockedClock time = new MockedClock();

            RollingNumber counter = new RollingNumber(time, 200, 10);

            // increment
            counter.Increment(RollingNumberEvent.TIMEOUT);

            var buckets = counter.GetBuckets().ToArray();

            // we should have 1 bucket
            Assert.Equal(1, buckets.Count());

            // the count should be 1
            Assert.Equal(1, buckets.First().GetAdder(RollingNumberEvent.TIMEOUT));
            Assert.Equal(1, counter.GetRollingSum(RollingNumberEvent.TIMEOUT));

            // sleep to get to a new bucket
            time.Increment(counter.BucketSizeInMs * 3);

            // incremenet again in latest bucket
            counter.Increment(RollingNumberEvent.TIMEOUT);

            // we should have 2 buckets
            buckets = counter.GetBuckets().ToArray();
            Assert.Equal(2, buckets.Length);

            // the counts of the last bucket
            Assert.Equal(1, buckets.First().GetAdder(RollingNumberEvent.TIMEOUT));

            // the total counts
            Assert.Equal(2, counter.GetRollingSum(RollingNumberEvent.TIMEOUT));
        }
        public void testEmptySum()
        {
            MockedClock        time    = new MockedClock();
            RollingNumberEvent type    = RollingNumberEvent.SUCCESS;
            RollingNumber      counter = new RollingNumber(time, 200, 10);

            Assert.Equal(0, counter.GetRollingSum(type));
        }
        public void testIncrementInMultipleBuckets()
        {
            MockedClock time = new MockedClock();

            RollingNumber counter = new RollingNumber(time, 200, 10);

            // increment
            counter.Increment(RollingNumberEvent.SUCCESS);
            counter.Increment(RollingNumberEvent.SUCCESS);
            counter.Increment(RollingNumberEvent.SUCCESS);
            counter.Increment(RollingNumberEvent.SUCCESS);
            counter.Increment(RollingNumberEvent.FAILURE);
            counter.Increment(RollingNumberEvent.FAILURE);
            counter.Increment(RollingNumberEvent.TIMEOUT);
            counter.Increment(RollingNumberEvent.TIMEOUT);
            counter.Increment(RollingNumberEvent.SHORT_CIRCUITED);

            // sleep to get to a new bucket
            time.Increment(counter.BucketSizeInMs * 3);

            // increment
            counter.Increment(RollingNumberEvent.SUCCESS);
            counter.Increment(RollingNumberEvent.SUCCESS);
            counter.Increment(RollingNumberEvent.FAILURE);
            counter.Increment(RollingNumberEvent.FAILURE);
            counter.Increment(RollingNumberEvent.FAILURE);
            counter.Increment(RollingNumberEvent.TIMEOUT);
            counter.Increment(RollingNumberEvent.SHORT_CIRCUITED);

            // we should have 2 buckets
            var buckets = counter.GetBuckets().ToArray();

            Assert.Equal(2, buckets.Length);

            // the counts of the last bucket
            Assert.Equal(2, buckets.First().GetAdder(RollingNumberEvent.SUCCESS));
            Assert.Equal(3, buckets.First().GetAdder(RollingNumberEvent.FAILURE));
            Assert.Equal(1, buckets.First().GetAdder(RollingNumberEvent.TIMEOUT));
            Assert.Equal(1, buckets.First().GetAdder(RollingNumberEvent.SHORT_CIRCUITED));

            // the total counts
            Assert.Equal(6, counter.GetRollingSum(RollingNumberEvent.SUCCESS));
            Assert.Equal(5, counter.GetRollingSum(RollingNumberEvent.FAILURE));
            Assert.Equal(3, counter.GetRollingSum(RollingNumberEvent.TIMEOUT));
            Assert.Equal(2, counter.GetRollingSum(RollingNumberEvent.SHORT_CIRCUITED));

            // wait until window passes
            time.Increment(counter.TimeInMs * 10);

            // increment
            counter.Increment(RollingNumberEvent.SUCCESS);

            // the total counts should now include only the last bucket after a reset since the window passed
            Assert.Equal(1, counter.GetRollingSum(RollingNumberEvent.SUCCESS));
            Assert.Equal(0, counter.GetRollingSum(RollingNumberEvent.FAILURE));
            Assert.Equal(0, counter.GetRollingSum(RollingNumberEvent.TIMEOUT));
        }
        public void testCounterRetrievalRefreshesBuckets()
        {
            MockedClock time = new MockedClock();

            RollingNumber counter = new RollingNumber(time, 200, 10);

            // increment
            counter.Increment(RollingNumberEvent.SUCCESS);
            counter.Increment(RollingNumberEvent.SUCCESS);
            counter.Increment(RollingNumberEvent.SUCCESS);
            counter.Increment(RollingNumberEvent.SUCCESS);
            counter.Increment(RollingNumberEvent.FAILURE);
            counter.Increment(RollingNumberEvent.FAILURE);

            // sleep to get to a new bucket
            time.Increment(counter.BucketSizeInMs * 3);

            var buckets = counter.GetBuckets().ToArray();

            // we should have 1 bucket since nothing has triggered the update of buckets in the elapsed time
            Assert.Equal(1, buckets.Length);

            // the total counts
            Assert.Equal(4, counter.GetRollingSum(RollingNumberEvent.SUCCESS));
            Assert.Equal(2, counter.GetRollingSum(RollingNumberEvent.FAILURE));

            // we should have 2 buckets as the counter 'gets' should have triggered the buckets being created to fill in time
            buckets = counter.GetBuckets().ToArray();
            Assert.Equal(2, buckets.Length);

            // wait until window passes
            time.Increment(counter.TimeInMs);

            // the total counts should all be 0 (and the buckets cleared by the get, not only increment)
            Assert.Equal(0, counter.GetRollingSum(RollingNumberEvent.SUCCESS));
            Assert.Equal(0, counter.GetRollingSum(RollingNumberEvent.FAILURE));

            // increment
            counter.Increment(RollingNumberEvent.SUCCESS);

            // the total counts should now include only the last bucket after a reset since the window passed
            Assert.Equal(1, counter.GetRollingSum(RollingNumberEvent.SUCCESS));
            Assert.Equal(0, counter.GetRollingSum(RollingNumberEvent.FAILURE));
        }