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#include "histogram.h"
#include <library/cpp/testing/unittest/registar.h>
using namespace NMonitoring;
Y_UNIT_TEST_SUITE(THistorgamTest) {
Y_UNIT_TEST(TakeSnapshot) {
THdrHistogram h(1, 10, 3);
UNIT_ASSERT(h.RecordValue(1));
UNIT_ASSERT(h.RecordValue(2));
UNIT_ASSERT(h.RecordValues(3, 10));
UNIT_ASSERT(h.RecordValue(4));
UNIT_ASSERT(h.RecordValue(5));
UNIT_ASSERT_EQUAL(h.GetTotalCount(), 14);
THistogramSnapshot snapshot;
h.TakeSnaphot(&snapshot);
UNIT_ASSERT_EQUAL(h.GetTotalCount(), 0);
UNIT_ASSERT_EQUAL(snapshot.Min, 1);
UNIT_ASSERT_EQUAL(snapshot.Max, 5);
// >>> a = [1, 2] + [3 for i in range(10)] + [4, 5]
// >>> numpy.mean(a)
// 3.0
UNIT_ASSERT_DOUBLES_EQUAL(snapshot.Mean, 3.0, 1e-6);
// >>> numpy.std(a)
// 0.84515425472851657
UNIT_ASSERT_DOUBLES_EQUAL(snapshot.StdDeviation, 0.84515425472851657, 1e-6);
// >>> [(p, round(numpy.percentile(a, p))) for p in [50, 75, 90, 95, 98, 99, 99.9, 100]]
// [(50, 3.0), (75, 3.0), (90, 4.0), (95, 4.0), (98, 5.0), (99, 5.0), (99.9, 5.0), (100, 5.0)]
UNIT_ASSERT_EQUAL(snapshot.Percentile50, 3);
UNIT_ASSERT_EQUAL(snapshot.Percentile75, 3);
UNIT_ASSERT_EQUAL(snapshot.Percentile90, 4);
UNIT_ASSERT_EQUAL(snapshot.Percentile95, 4);
UNIT_ASSERT_EQUAL(snapshot.Percentile98, 5);
UNIT_ASSERT_EQUAL(snapshot.Percentile99, 5);
UNIT_ASSERT_EQUAL(snapshot.Percentile999, 5);
UNIT_ASSERT_EQUAL(snapshot.TotalCount, 14);
}
}
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