public void TestMaxValue()
{
MockedTime time = new MockedTime();
try
{
HystrixRollingNumberEvent type = HystrixRollingNumberEvent.THREAD_MAX_ACTIVE;
HystrixRollingNumber counter = new HystrixRollingNumber(time, 200, 10);
counter.UpdateRollingMax(type, 10);
// sleep to get to a new bucket
time.Increment(counter._bucketSizeInMillseconds);
counter.UpdateRollingMax(type, 30);
// sleep to get to a new bucket
time.Increment(counter._bucketSizeInMillseconds);
counter.UpdateRollingMax(type, 40);
// sleep to get to a new bucket
time.Increment(counter._bucketSizeInMillseconds);
counter.UpdateRollingMax(type, 15);
Assert.Equal(40, counter.GetRollingMaxValue(type));
}
catch (Exception e)
{
output.WriteLine(e.ToString());
Assert.True(false, "Exception: " + e.Message);
}
}
public void TestValueIsZeroAfterRollingWindowPassesAndNoTraffic()
{
var time = new MockedTime();
var p = new HystrixRollingPercentile(time, TimeInMilliseconds, NumberOfBuckets, BucketDataLength, Enabled);
p.AddValue(1000);
p.AddValue(1000);
p.AddValue(1000);
p.AddValue(2000);
p.AddValue(4000);
Assert.Equal(1, p._buckets.Size);
// no bucket turnover yet so percentile not yet generated
Assert.Equal(0, p.GetPercentile(50));
time.Increment(6000);
// still only 1 bucket until we touch it again
Assert.Equal(1, p._buckets.Size);
// a bucket has been created so we have a new percentile
Assert.Equal(1500, p.GetPercentile(50));
// let 1 minute pass
time.Increment(60000);
// no data in a minute should mean all buckets are empty (or reset) so we should not have any percentiles
Assert.Equal(0, p.GetPercentile(50));
}
public void TestCounterRetrievalRefreshesBuckets()
{
MockedTime time = new MockedTime();
try
{
HystrixRollingNumber counter = new HystrixRollingNumber(time, 200, 10);
// Increment
counter.Increment(HystrixRollingNumberEvent.SUCCESS);
counter.Increment(HystrixRollingNumberEvent.SUCCESS);
counter.Increment(HystrixRollingNumberEvent.SUCCESS);
counter.Increment(HystrixRollingNumberEvent.SUCCESS);
counter.Increment(HystrixRollingNumberEvent.FAILURE);
counter.Increment(HystrixRollingNumberEvent.FAILURE);
// sleep to get to a new bucket
time.Increment(counter._bucketSizeInMillseconds * 3);
// we should have 1 bucket since nothing has triggered the update of buckets in the elapsed time
Assert.Equal(1, counter._buckets.Size);
// the total counts
Assert.Equal(4, counter.GetRollingSum(HystrixRollingNumberEvent.SUCCESS));
Assert.Equal(2, counter.GetRollingSum(HystrixRollingNumberEvent.FAILURE));
// we should have 4 buckets as the counter 'gets' should have triggered the buckets being created to fill in time
Assert.Equal(4, counter._buckets.Size);
// wait until window passes
time.Increment(counter._timeInMilliseconds);
// the total counts should all be 0 (and the buckets cleared by the get, not only Increment)
Assert.Equal(0, counter.GetRollingSum(HystrixRollingNumberEvent.SUCCESS));
Assert.Equal(0, counter.GetRollingSum(HystrixRollingNumberEvent.FAILURE));
// Increment
counter.Increment(HystrixRollingNumberEvent.SUCCESS);
// the total counts should now include only the last bucket after a reset since the window passed
Assert.Equal(1, counter.GetRollingSum(HystrixRollingNumberEvent.SUCCESS));
Assert.Equal(0, counter.GetRollingSum(HystrixRollingNumberEvent.FAILURE));
}
catch (Exception e)
{
output.WriteLine(e.ToString());
Assert.True(false, "Exception: " + e.Message);
}
}
public void TestCreatesBuckets()
{
MockedTime time = new MockedTime();
try
{
HystrixRollingNumber counter = new HystrixRollingNumber(time, 200, 10);
// confirm the initial settings
Assert.Equal(200, counter.timeInMilliseconds);
Assert.Equal(10, counter.numberOfBuckets);
Assert.Equal(20, counter.bucketSizeInMillseconds);
// we start out with 0 buckets in the queue
Assert.Equal(0, counter.buckets.Size);
// 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(HystrixRollingNumberEvent.SUCCESS);
time.Increment(counter.bucketSizeInMillseconds);
}
// confirm we have all 10 buckets
Assert.Equal(10, counter.buckets.Size);
// add 1 more and we should still only have 10 buckets since that's the max
counter.Increment(HystrixRollingNumberEvent.SUCCESS);
Assert.Equal(10, counter.buckets.Size);
}
catch (Exception e)
{
output.WriteLine(e.ToString());
Assert.True(false, "Exception: " + e.Message);
}
}
public void TestSampleDataOverTime2()
{
output.WriteLine("\n\n***************************** testSampleDataOverTime2 \n");
var time = new MockedTime();
int previousTime = 0;
var p = new HystrixRollingPercentile(time, TimeInMilliseconds, NumberOfBuckets, BucketDataLength, Enabled);
for (int i = 0; i < SampleDataHolder2.Data.Length; i++)
{
int timeInMillisecondsSinceStart = SampleDataHolder2.Data[i][0];
int latency = SampleDataHolder2.Data[i][1];
time.Increment(timeInMillisecondsSinceStart - previousTime);
previousTime = timeInMillisecondsSinceStart;
p.AddValue(latency);
}
output.WriteLine("0.01: " + p.GetPercentile(0.01));
output.WriteLine("Median: " + p.GetPercentile(50));
output.WriteLine("90th: " + p.GetPercentile(90));
output.WriteLine("99th: " + p.GetPercentile(99));
output.WriteLine("99.5th: " + p.GetPercentile(99.5));
output.WriteLine("99.99: " + p.GetPercentile(99.99));
if (p.GetPercentile(50) > 90 || p.GetPercentile(50) < 50)
{
Assert.True(false, "We expect around 60-70 but got: " + p.GetPercentile(50));
}
if (p.GetPercentile(99) < 400)
{
Assert.True(false, "We expect to see some high values over 400 but got: " + p.GetPercentile(99));
}
}
public void TestEmptyBucketsFillIn()
{
MockedTime time = new MockedTime();
try
{
HystrixRollingNumber counter = new HystrixRollingNumber(time, 200, 10);
// add 1
counter.Increment(HystrixRollingNumberEvent.SUCCESS);
// we should have 1 bucket
Assert.Equal(1, counter._buckets.Size);
// wait past 3 bucket time periods (the 1st bucket then 2 empty ones)
time.Increment(counter._bucketSizeInMillseconds * 3);
// add another
counter.Increment(HystrixRollingNumberEvent.SUCCESS);
// we should have 4 (1 + 2 empty + 1 new one) buckets
Assert.Equal(4, counter._buckets.Size);
}
catch (Exception e)
{
output.WriteLine(e.ToString());
Assert.True(false, "Exception: " + e.Message);
}
}
public void TestCumulativeCounterAfterRolling()
{
MockedTime time = new MockedTime();
HystrixRollingNumberEvent type = HystrixRollingNumberEvent.SUCCESS;
HystrixRollingNumber counter = new HystrixRollingNumber(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._bucketSizeInMillseconds);
}
catch (Exception)
{
// ignore
}
Assert.Equal(2, counter.GetValues(type).Length);
counter.GetValueOfLatestBucket(type);
}
// cumulative count should be 20 (for the number of loops above) regardless of buckets rolling
Assert.Equal(20, counter.GetCumulativeSum(type));
}
public void TestCumulativeCounterAfterRollingAndReset3()
{
MockedTime time = new MockedTime();
HystrixRollingNumberEvent type = HystrixRollingNumberEvent.SUCCESS;
HystrixRollingNumber counter = new HystrixRollingNumber(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._bucketSizeInMillseconds);
}
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 TestRolling()
{
MockedTime time = new MockedTime();
HystrixRollingNumberEvent type = HystrixRollingNumberEvent.THREAD_MAX_ACTIVE;
HystrixRollingNumber counter = new HystrixRollingNumber(time, 20, 2);
// iterate over 20 buckets on a queue sized for 2
for (int i = 0; i < 20; i++)
{
// first bucket
counter.GetCurrentBucket();
try
{
time.Increment(counter._bucketSizeInMillseconds);
}
catch (Exception)
{
// ignore
}
Assert.Equal(2, counter.GetValues(type).Length);
counter.GetValueOfLatestBucket(type);
// System.out.println("Head: " + counter._buckets.state.get().head);
// System.out.println("Tail: " + counter._buckets.state.get().tail);
}
}
public void TestThreadSafety()
{
var time = new MockedTime();
var p = new HystrixRollingPercentile(time, 100, 25, 1000, true);
int num_threads = 1000; // .NET Core StackOverflow
int num_iterations = 1000000;
var latch = new CountdownEvent(num_threads);
var aggregateMetrics = new AtomicInteger(); // same as a blackhole
var r = new Random();
var cts = new CancellationTokenSource();
var metricsPoller = Task.Run(() =>
{
while (!cts.Token.IsCancellationRequested)
{
aggregateMetrics.AddAndGet(p.Mean + p.GetPercentile(10) + p.GetPercentile(50) + p.GetPercentile(90));
}
});
for (int i = 0; i < num_threads; i++)
{
int threadId = i;
Task.Run(() =>
{
for (int j = 1; j < (num_iterations / num_threads) + 1; j++)
{
int nextInt = r.Next(100);
p.AddValue(nextInt);
if (threadId == 0)
{
time.Increment(1);
}
}
latch.SignalEx();
});
}
try
{
latch.Wait(TimeSpan.FromSeconds(100));
cts.Cancel();
}
catch (Exception)
{
Assert.True(false, "Timeout on all threads writing percentiles");
}
aggregateMetrics.AddAndGet(p.Mean + p.GetPercentile(10) + p.GetPercentile(50) + p.GetPercentile(90));
output.WriteLine(p.Mean + " : " + p.GetPercentile(50) + " : " + p.GetPercentile(75) + " : " + p.GetPercentile(90) + " : " + p.GetPercentile(95) + " : " + p.GetPercentile(99));
}
public void TestUpdateMax2()
{
MockedTime time = new MockedTime();
try
{
HystrixRollingNumber counter = new HystrixRollingNumber(time, 200, 10);
// Increment
counter.UpdateRollingMax(HystrixRollingNumberEvent.THREAD_MAX_ACTIVE, 10);
counter.UpdateRollingMax(HystrixRollingNumberEvent.THREAD_MAX_ACTIVE, 30);
counter.UpdateRollingMax(HystrixRollingNumberEvent.THREAD_MAX_ACTIVE, 20);
// we should have 1 bucket
Assert.Equal(1, counter._buckets.Size);
// the count should be 30
Assert.Equal(30, counter._buckets.Last.GetMaxUpdater(HystrixRollingNumberEvent.THREAD_MAX_ACTIVE).Max);
Assert.Equal(30, counter.GetRollingMaxValue(HystrixRollingNumberEvent.THREAD_MAX_ACTIVE));
// sleep to get to a new bucket
time.Increment(counter._bucketSizeInMillseconds * 3);
counter.UpdateRollingMax(HystrixRollingNumberEvent.THREAD_MAX_ACTIVE, 30);
counter.UpdateRollingMax(HystrixRollingNumberEvent.THREAD_MAX_ACTIVE, 30);
counter.UpdateRollingMax(HystrixRollingNumberEvent.THREAD_MAX_ACTIVE, 50);
// we should have 4 buckets
Assert.Equal(4, counter._buckets.Size);
// the count
Assert.Equal(50, counter._buckets.Last.GetMaxUpdater(HystrixRollingNumberEvent.THREAD_MAX_ACTIVE).Max);
Assert.Equal(50, counter.GetValueOfLatestBucket(HystrixRollingNumberEvent.THREAD_MAX_ACTIVE));
// values per bucket
long[] values = counter.GetValues(HystrixRollingNumberEvent.THREAD_MAX_ACTIVE);
Assert.Equal(30, values[0]); // oldest bucket
Assert.Equal(0, values[1]);
Assert.Equal(0, values[2]);
Assert.Equal(50, values[3]); // latest bucket
}
catch (Exception e)
{
output.WriteLine(e.ToString());
Assert.True(false, "Exception: " + e.Message);
}
}
public void TestDoesNothingWhenDisabled()
{
MockedTime time = new MockedTime();
int previousTime = 0;
HystrixRollingPercentile p = new HystrixRollingPercentile(time, TimeInMilliseconds, NumberOfBuckets, BucketDataLength, false);
for (int i = 0; i < SampleDataHolder2.Data.Length; i++)
{
int timeInMillisecondsSinceStart = SampleDataHolder2.Data[i][0];
int latency = SampleDataHolder2.Data[i][1];
time.Increment(timeInMillisecondsSinceStart - previousTime);
previousTime = timeInMillisecondsSinceStart;
p.AddValue(latency);
}
Assert.Equal(-1, p.GetPercentile(50));
Assert.Equal(-1, p.GetPercentile(75));
Assert.Equal(-1, p.Mean);
}
public void TestSampleDataOverTime1()
{
output.WriteLine("\n\n***************************** testSampleDataOverTime1 \n");
var time = new MockedTime();
var p = new HystrixRollingPercentile(time, TimeInMilliseconds, NumberOfBuckets, BucketDataLength, Enabled);
int previousTime = 0;
for (int i = 0; i < SampleDataHolder1.Data.Length; i++)
{
int timeInMillisecondsSinceStart = SampleDataHolder1.Data[i][0];
int latency = SampleDataHolder1.Data[i][1];
time.Increment(timeInMillisecondsSinceStart - previousTime);
previousTime = timeInMillisecondsSinceStart;
p.AddValue(latency);
}
output.WriteLine("0.01: " + p.GetPercentile(0.01));
output.WriteLine("Median: " + p.GetPercentile(50));
output.WriteLine("90th: " + p.GetPercentile(90));
output.WriteLine("99th: " + p.GetPercentile(99));
output.WriteLine("99.5th: " + p.GetPercentile(99.5));
output.WriteLine("99.99: " + p.GetPercentile(99.99));
output.WriteLine("Median: " + p.GetPercentile(50));
output.WriteLine("Median: " + p.GetPercentile(50));
output.WriteLine("Median: " + p.GetPercentile(50));
/*
* In a loop as a use case was found where very different values were calculated in subsequent requests.
*/
for (int i = 0; i < 10; i++)
{
if (p.GetPercentile(50) > 5)
{
Assert.True(false, "We expect around 2 but got: " + p.GetPercentile(50));
}
if (p.GetPercentile(99.5) < 20)
{
Assert.True(false, "We expect to see some high values over 20 but got: " + p.GetPercentile(99.5));
}
}
}
public void TestShortCircuited()
{
var time = new MockedTime();
try
{
var counter = new HystrixRollingNumber(time, 200, 10);
// Increment
counter.Increment(HystrixRollingNumberEvent.SHORT_CIRCUITED);
// we should have 1 bucket
Assert.Equal(1, counter._buckets.Size);
// the count should be 1
Assert.Equal(1, counter._buckets.Last.GetAdder(HystrixRollingNumberEvent.SHORT_CIRCUITED).Sum());
Assert.Equal(1, counter.GetRollingSum(HystrixRollingNumberEvent.SHORT_CIRCUITED));
// sleep to get to a new bucket
time.Increment(counter._bucketSizeInMillseconds * 3);
// incremenet again in latest bucket
counter.Increment(HystrixRollingNumberEvent.SHORT_CIRCUITED);
// we should have 4 buckets
Assert.Equal(4, counter._buckets.Size);
// the counts of the last bucket
Assert.Equal(1, counter._buckets.Last.GetAdder(HystrixRollingNumberEvent.SHORT_CIRCUITED).Sum());
// the total counts
Assert.Equal(2, counter.GetRollingSum(HystrixRollingNumberEvent.SHORT_CIRCUITED));
}
catch (Exception e)
{
output.WriteLine(e.ToString());
Assert.True(false, "Exception: " + e.Message);
}
}
private void TestCounterType(HystrixRollingNumberEvent type)
{
MockedTime time = new MockedTime();
try
{
HystrixRollingNumber counter = new HystrixRollingNumber(time, 200, 10);
// Increment
counter.Increment(type);
// we should have 1 bucket
Assert.Equal(1, counter._buckets.Size);
// the count should be 1
Assert.Equal(1, counter._buckets.Last.GetAdder(type).Sum());
Assert.Equal(1, counter.GetRollingSum(type));
// sleep to get to a new bucket
time.Increment(counter._bucketSizeInMillseconds * 3);
// Increment again in latest bucket
counter.Increment(type);
// we should have 4 buckets
Assert.Equal(4, counter._buckets.Size);
// the counts of the last bucket
Assert.Equal(1, counter._buckets.Last.GetAdder(type).Sum());
// the total counts
Assert.Equal(2, counter.GetRollingSum(type));
}
catch (Exception e)
{
output.WriteLine(e.ToString());
Assert.True(false, "Exception: " + e.Message);
}
}
public void TestCumulativeCounterAfterRollingAndReset2()
{
MockedTime time = new MockedTime();
HystrixRollingNumberEvent type = HystrixRollingNumberEvent.SUCCESS;
HystrixRollingNumber counter = new HystrixRollingNumber(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._bucketSizeInMillseconds);
}
catch (Exception)
{
// ignore
}
if (i == 5 || i == 15)
{
// simulate a reset occurring every once in a while
// so we ensure the absolute Sum is handling it okay
counter.Reset();
}
}
// 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 TestCumulativeCounterAfterRollingAndReset()
{
MockedTime time = new MockedTime();
HystrixRollingNumberEvent type = HystrixRollingNumberEvent.SUCCESS;
HystrixRollingNumber counter = new HystrixRollingNumber(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._bucketSizeInMillseconds);
}
catch (Exception)
{
// ignore
}
Assert.Equal(2, counter.GetValues(type).Length);
counter.GetValueOfLatestBucket(type);
if (i == 5 || i == 15)
{
// simulate a reset occurring every once in a while
// so we ensure the absolute Sum is handling it okay
counter.Reset();
}
}
// cumulative count should be 20 (for the number of loops above) regardless of buckets rolling
Assert.Equal(20, counter.GetCumulativeSum(type));
}
public void TestIncrementInMultipleBuckets()
{
MockedTime time = new MockedTime();
try
{
HystrixRollingNumber counter = new HystrixRollingNumber(time, 200, 10);
// Increment
counter.Increment(HystrixRollingNumberEvent.SUCCESS);
counter.Increment(HystrixRollingNumberEvent.SUCCESS);
counter.Increment(HystrixRollingNumberEvent.SUCCESS);
counter.Increment(HystrixRollingNumberEvent.SUCCESS);
counter.Increment(HystrixRollingNumberEvent.FAILURE);
counter.Increment(HystrixRollingNumberEvent.FAILURE);
counter.Increment(HystrixRollingNumberEvent.TIMEOUT);
counter.Increment(HystrixRollingNumberEvent.TIMEOUT);
counter.Increment(HystrixRollingNumberEvent.SHORT_CIRCUITED);
// sleep to get to a new bucket
time.Increment(counter._bucketSizeInMillseconds * 3);
// Increment
counter.Increment(HystrixRollingNumberEvent.SUCCESS);
counter.Increment(HystrixRollingNumberEvent.SUCCESS);
counter.Increment(HystrixRollingNumberEvent.FAILURE);
counter.Increment(HystrixRollingNumberEvent.FAILURE);
counter.Increment(HystrixRollingNumberEvent.FAILURE);
counter.Increment(HystrixRollingNumberEvent.TIMEOUT);
counter.Increment(HystrixRollingNumberEvent.SHORT_CIRCUITED);
// we should have 4 buckets
Assert.Equal(4, counter._buckets.Size);
// the counts of the last bucket
Assert.Equal(2, counter._buckets.Last.GetAdder(HystrixRollingNumberEvent.SUCCESS).Sum());
Assert.Equal(3, counter._buckets.Last.GetAdder(HystrixRollingNumberEvent.FAILURE).Sum());
Assert.Equal(1, counter._buckets.Last.GetAdder(HystrixRollingNumberEvent.TIMEOUT).Sum());
Assert.Equal(1, counter._buckets.Last.GetAdder(HystrixRollingNumberEvent.SHORT_CIRCUITED).Sum());
// the total counts
Assert.Equal(6, counter.GetRollingSum(HystrixRollingNumberEvent.SUCCESS));
Assert.Equal(5, counter.GetRollingSum(HystrixRollingNumberEvent.FAILURE));
Assert.Equal(3, counter.GetRollingSum(HystrixRollingNumberEvent.TIMEOUT));
Assert.Equal(2, counter.GetRollingSum(HystrixRollingNumberEvent.SHORT_CIRCUITED));
// wait until window passes
time.Increment(counter._timeInMilliseconds);
// Increment
counter.Increment(HystrixRollingNumberEvent.SUCCESS);
// the total counts should now include only the last bucket after a reset since the window passed
Assert.Equal(1, counter.GetRollingSum(HystrixRollingNumberEvent.SUCCESS));
Assert.Equal(0, counter.GetRollingSum(HystrixRollingNumberEvent.FAILURE));
Assert.Equal(0, counter.GetRollingSum(HystrixRollingNumberEvent.TIMEOUT));
}
catch (Exception e)
{
output.WriteLine(e.ToString());
Assert.True(false, "Exception: " + e.Message);
}
}
public void TestRolling()
{
var time = new MockedTime();
var p = new HystrixRollingPercentile(time, TimeInMilliseconds, NumberOfBuckets, BucketDataLength, Enabled);
p.AddValue(1000);
p.AddValue(1000);
p.AddValue(1000);
p.AddValue(2000);
Assert.Equal(1, p._buckets.Size);
// no bucket turnover yet so percentile not yet generated
Assert.Equal(0, p.GetPercentile(50));
time.Increment(6000);
// still only 1 bucket until we touch it again
Assert.Equal(1, p._buckets.Size);
// a bucket has been created so we have a new percentile
Assert.Equal(1000, p.GetPercentile(50));
// now 2 buckets since getting a percentile causes bucket retrieval
Assert.Equal(2, p._buckets.Size);
p.AddValue(1000);
p.AddValue(500);
// should still be 2 buckets
Assert.Equal(2, p._buckets.Size);
p.AddValue(200);
p.AddValue(200);
p.AddValue(1600);
p.AddValue(200);
p.AddValue(1600);
p.AddValue(1600);
// we haven't progressed to a new bucket so the percentile should be the same and ignore the most recent bucket
Assert.Equal(1000, p.GetPercentile(50));
// Increment to another bucket so we include all of the above in the PercentileSnapshot
time.Increment(6000);
// the rolling version should have the same data as creating a snapshot like this
var ps = new PercentileSnapshot(1000, 1000, 1000, 2000, 1000, 500, 200, 200, 1600, 200, 1600, 1600);
Assert.Equal(ps.GetPercentile(0.15), p.GetPercentile(0.15));
Assert.Equal(ps.GetPercentile(0.50), p.GetPercentile(0.50));
Assert.Equal(ps.GetPercentile(0.90), p.GetPercentile(0.90));
Assert.Equal(ps.GetPercentile(0.995), p.GetPercentile(0.995));
output.WriteLine("100th: " + ps.GetPercentile(100) + " " + p.GetPercentile(100));
output.WriteLine("99.5th: " + ps.GetPercentile(99.5) + " " + p.GetPercentile(99.5));
output.WriteLine("99th: " + ps.GetPercentile(99) + " " + p.GetPercentile(99));
output.WriteLine("90th: " + ps.GetPercentile(90) + " " + p.GetPercentile(90));
output.WriteLine("50th: " + ps.GetPercentile(50) + " " + p.GetPercentile(50));
output.WriteLine("10th: " + ps.GetPercentile(10) + " " + p.GetPercentile(10));
// mean = 1000+1000+1000+2000+1000+500+200+200+1600+200+1600+1600/12
Assert.Equal(991, ps.Mean);
}
