public void testCreatesBuckets()
{
var time = new MockedClock();
var counter = new RollingNumber(time, 200, 10);
// confirm the initial settings
Assert.Equal(200, counter.TimeInMs);
Assert.Equal(10, counter.NumberOfBuckets);
Assert.Equal(20, counter.BucketSizeInMs);
// add a Success in each interval which should result in all 10 buckets being created with 1 Success in each
for (int i = 0; i < counter.NumberOfBuckets; i++)
{
counter.Increment(RollingNumberEvent.SUCCESS);
time.Increment(counter.BucketSizeInMs);
}
// confirm we have all 10 buckets
var buckets = counter.GetBuckets().ToArray();
Assert.Equal(10, buckets.Length);
// add 1 more and we should still only have 10 buckets since that's the max
counter.Increment(RollingNumberEvent.SUCCESS);
buckets = counter.GetBuckets().ToArray();
Assert.Equal(10, buckets.Length);
}
public void testResetBuckets()
{
MockedClock time = new MockedClock();
RollingNumber counter = new RollingNumber(time, 200, 10);
// add 1
counter.Increment(RollingNumberEvent.SUCCESS);
// confirm we have 1 bucket
var buckets = counter.GetBuckets().ToArray();
Assert.Equal(1, buckets.Length);
// confirm we still have 1 bucket
Assert.Equal(1, buckets.Length);
// add 1
counter.Increment(RollingNumberEvent.SUCCESS);
// we should now have a single bucket with no values in it instead of 2 or more buckets
buckets = counter.GetBuckets().ToArray();
Assert.Equal(1, buckets.Length);
}
public void testIncrementInSingleBucket()
{
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);
// we should have 1 bucket
var buckets = counter.GetBuckets().ToArray();
Assert.Equal(1, buckets.Length);
// the count should be 4
Assert.Equal(4, counter.GetCurrentBucket().GetAdder(RollingNumberEvent.SUCCESS));
Assert.Equal(2, counter.GetCurrentBucket().GetAdder(RollingNumberEvent.FAILURE));
Assert.Equal(1, counter.GetCurrentBucket().GetAdder(RollingNumberEvent.TIMEOUT));
}
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 testCumulativeCounterAfterRollingAndReset3()
{
MockedClock time = new MockedClock();
RollingNumberEvent type = RollingNumberEvent.SUCCESS;
RollingNumber counter = new RollingNumber(time, 20, 2);
Assert.Equal(0, counter.GetCumulativeSum(type));
counter.Increment(type);
counter.Increment(type);
counter.Increment(type);
// iterate over 20 buckets on a queue sized for 2
for (int i = 0; i < 20; i++)
{
try
{
time.Increment(counter.BucketSizeInMs);
}
catch (Exception)
{
// ignore
}
}
// since we are rolling over the buckets it should reset naturally
// no increments during the loop, just some before and after
counter.Increment(type);
counter.Increment(type);
// cumulative count should be 5 regardless of buckets rolling
Assert.Equal(5, counter.GetCumulativeSum(type));
}
public void testCumulativeCounterAfterRolling()
{
MockedClock time = new MockedClock();
RollingNumberEvent type = RollingNumberEvent.SUCCESS;
RollingNumber counter = new RollingNumber(time, 20, 2);
Assert.Equal(0, counter.GetCumulativeSum(type));
// iterate over 20 buckets on a queue sized for 2
for (int i = 0; i < 20; i++)
{
// first bucket
counter.Increment(type);
try
{
time.Increment(counter.BucketSizeInMs);
}
catch (Exception)
{
// ignore
}
counter.GetValueOfLatestBucket(type);
Assert.Equal(2, counter.GetValues(type).Count());
}
// cumulative count should be 20 (for the number of loops above) regardless of buckets rolling
Assert.Equal(20, counter.GetCumulativeSum(type));
}
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));
}
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));
}
