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#include "ewma.h"
#include "metric.h"
#include <library/cpp/testing/unittest/registar.h>
using namespace NMonitoring;
const auto EPS = 1e-6;
void ElapseMinute(IExpMovingAverage& ewma) {
for (auto i = 0; i < 12; ++i) {
ewma.Tick();
}
}
Y_UNIT_TEST_SUITE(TEwmaTest) {
Y_UNIT_TEST(OneMinute) {
TGauge gauge;
auto ewma = OneMinuteEwma(&gauge);
ewma->Update(3);
ewma->Tick();
TVector<double> expectedValues {
0.6,
0.22072766,
0.08120117,
0.02987224,
0.01098938,
0.00404277,
0.00148725,
0.00054713,
0.00020128,
0.00007405,
0.00002724,
0.00001002,
0.00000369,
0.00000136,
0.00000050,
0.00000018,
};
for (auto expectedValue : expectedValues) {
UNIT_ASSERT_DOUBLES_EQUAL(ewma->Rate(), expectedValue, EPS);
ElapseMinute(*ewma);
}
}
Y_UNIT_TEST(FiveMinutes) {
TGauge gauge;
auto ewma = FiveMinuteEwma(&gauge);
ewma->Update(3);
ewma->Tick();
TVector<double> expectedValues {
0.6,
0.49123845,
0.40219203,
0.32928698,
0.26959738,
0.22072766,
0.18071653,
0.14795818,
0.12113791,
0.09917933,
0.08120117,
0.06648190,
0.05443077,
0.04456415,
0.03648604,
0.02987224,
};
for (auto expectedValue : expectedValues) {
UNIT_ASSERT_DOUBLES_EQUAL(ewma->Rate(), expectedValue, EPS);
ElapseMinute(*ewma);
}
}
Y_UNIT_TEST(FiveteenMinutes) {
TGauge gauge;
auto ewma = FiveteenMinuteEwma(&gauge);
ewma->Update(3);
ewma->Tick();
TVector<double> expectedValues {
0.6,
0.56130419,
0.52510399,
0.49123845,
0.45955700,
0.42991879,
0.40219203,
0.37625345,
0.35198773,
0.32928698,
0.30805027,
0.28818318,
0.26959738,
0.25221023,
0.23594443,
0.22072766,
};
for (auto expectedValue : expectedValues) {
UNIT_ASSERT_DOUBLES_EQUAL(ewma->Rate(), expectedValue, EPS);
ElapseMinute(*ewma);
}
}
}
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