public void GetQuantile_should_works_correctly(double quantile, double?expected)
{
var buckets = new List <KeyValuePair <HistogramBucket, double> >
{
new KeyValuePair <HistogramBucket, double>(new HistogramBucket(double.NegativeInfinity, 10), 3),
new KeyValuePair <HistogramBucket, double>(new HistogramBucket(10, 20), 4),
new KeyValuePair <HistogramBucket, double>(new HistogramBucket(20, 40), 5),
new KeyValuePair <HistogramBucket, double>(new HistogramBucket(40, double.PositiveInfinity), 6)
};
HistogramsAggregateFunction.GetQuantile(buckets, quantile).Should().Be(expected);
}
public void Aggregate_should_calculate_quantiles()
{
var function = new HistogramsAggregateFunction();
var timestamp = DateTimeOffset.Now;
var tags = MetricTags.Empty
.Append("team", "vostok")
.Append("project", "metrics-aggregators")
.Append(WellKnownTagKeys.Name, "magic");
for (var i = 0; i < 10; i++)
{
var lower = i % 3 == 0 ? double.NegativeInfinity : i % 3;
var upper = i % 3 + 1 == 3 ? double.PositiveInfinity : i % 3 + 1;
var aggregationParameters = new Dictionary <string, string>
{
{ "a", "aa" },
{ "b", "bb" },
{ "_lowerBound", lower.ToString(CultureInfo.InvariantCulture) },
{ "_upperBound", upper.ToString(CultureInfo.InvariantCulture) }
};
aggregationParameters.SetQuantiles(new[] { 0.1, 0.5, 0.75 });
function.Add(new MetricEvent(i, tags, timestamp, "unicorns", WellKnownAggregationTypes.Counter, aggregationParameters));
}
//[-Inf..1]=18, [1..2]=12, [2..Inf]=15
var aggregated = function.Aggregate(timestamp + 1.Minutes()).ToList();
aggregated
.Should()
.BeEquivalentTo(
new MetricEvent(1, tags.Append(WellKnownTagKeys.Aggregate, "p10"), timestamp + 1.Minutes(), "unicorns", null, null),
new MetricEvent(1.375, tags.Append(WellKnownTagKeys.Aggregate, "p50"), timestamp + 1.Minutes(), "unicorns", null, null),
new MetricEvent(2, tags.Append(WellKnownTagKeys.Aggregate, "p75"), timestamp + 1.Minutes(), "unicorns", null, null),
new MetricEvent(45, tags.Append(WellKnownTagKeys.Aggregate, WellKnownTagValues.AggregateCount), timestamp + 1.Minutes(), null, null, null)
);
}
