Martin Slachta
106 lines
2.5 KiB
C++
106 lines
2.5 KiB
C++
#include "metrics/MetricSample.hpp"
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#include "catch2/catch_test_macros.hpp"
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using tw::metrics::MetricField;
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using tw::metrics::MetricSample;
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using tw::metrics::value_of;
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TEST_CASE("Empty sample reports zero", "[metric_sample]") {
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MetricSample sample;
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REQUIRE(sample.is_empty());
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REQUIRE(sample.count == 0);
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REQUIRE(sample.sum == 0.0);
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REQUIRE(sample.min == 0.0);
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REQUIRE(sample.max == 0.0);
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REQUIRE(sample.avg() == 0.0);
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}
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TEST_CASE("Sample tracks sum, average and extremes", "[metric_sample]") {
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MetricSample sample;
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sample.add(4.0);
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sample.add(1.0);
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sample.add(7.0);
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REQUIRE(sample.count == 3);
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REQUIRE(sample.sum == 12.0);
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REQUIRE(sample.min == 1.0);
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REQUIRE(sample.max == 7.0);
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REQUIRE(sample.avg() == 4.0);
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}
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TEST_CASE("First value sets both extremes", "[metric_sample]") {
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MetricSample sample;
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sample.add(-5.0);
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REQUIRE(sample.min == -5.0);
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REQUIRE(sample.max == -5.0);
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}
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TEST_CASE("Merge folds one sample into another", "[metric_sample]") {
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MetricSample left;
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left.add(2.0);
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left.add(4.0);
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MetricSample right;
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right.add(10.0);
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right.add(0.5);
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left.merge(right);
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REQUIRE(left.count == 4);
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REQUIRE(left.sum == 16.5);
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REQUIRE(left.min == 0.5);
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REQUIRE(left.max == 10.0);
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}
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TEST_CASE("Merging with an empty sample changes nothing", "[metric_sample]") {
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MetricSample sample;
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sample.add(3.0);
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sample.merge(MetricSample{});
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REQUIRE(sample.count == 1);
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REQUIRE(sample.min == 3.0);
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REQUIRE(sample.max == 3.0);
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}
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TEST_CASE("Merging into an empty sample adopts the other", "[metric_sample]") {
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MetricSample other;
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other.add(3.0);
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other.add(9.0);
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MetricSample sample;
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sample.merge(other);
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REQUIRE(sample.count == 2);
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REQUIRE(sample.sum == 12.0);
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REQUIRE(sample.min == 3.0);
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REQUIRE(sample.max == 9.0);
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}
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TEST_CASE("Field selects the statistic to read", "[metric_sample]") {
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MetricSample sample;
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sample.add(2.0);
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sample.add(6.0);
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REQUIRE(value_of(sample, MetricField::Avg) == 4.0);
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REQUIRE(value_of(sample, MetricField::Min) == 2.0);
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REQUIRE(value_of(sample, MetricField::Max) == 6.0);
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REQUIRE(value_of(sample, MetricField::Sum) == 8.0);
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REQUIRE(value_of(sample, MetricField::Count) == 2.0);
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}
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TEST_CASE("Reset empties the sample", "[metric_sample]") {
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MetricSample sample;
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sample.add(5.0);
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sample.reset();
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REQUIRE(sample.is_empty());
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REQUIRE(sample.max == 0.0);
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}
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