intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 64 insertions, 0 deletions

diff --git a/library/cpp/monlib/metrics/summary_collector_ut.cpp b/library/cpp/monlib/metrics/summary_collector_ut.cpp
new file mode 100644
index 0000000000..191929550f
--- /dev/null
+++ b/library/cpp/monlib/metrics/summary_collector_ut.cpp
@@ -0,0 +1,64 @@
+#include "summary_collector.h"
+
+#include <library/cpp/testing/unittest/registar.h>
+
+#include <util/random/random.h>
+
+#include <numeric>
+#include <algorithm>
+
+namespace NMonitoring {
+
+Y_UNIT_TEST_SUITE(SummaryCollectorTest) {
+
+    void CheckSnapshot(ISummaryDoubleSnapshotPtr snapshot, const TVector<double> values) {
+        const double eps = 1e-9;
+
+        double sum = std::accumulate(values.begin(), values.end(), 0.0);
+        double min = *std::min_element(values.begin(), values.end());
+        double max = *std::max_element(values.begin(), values.end());
+        double last = values.back();
+        ui64 count = values.size();
+
+        UNIT_ASSERT_DOUBLES_EQUAL(snapshot->GetSum(), sum, eps);
+        UNIT_ASSERT_DOUBLES_EQUAL(snapshot->GetMin(), min, eps);
+        UNIT_ASSERT_DOUBLES_EQUAL(snapshot->GetMax(), max, eps);
+        UNIT_ASSERT_DOUBLES_EQUAL(snapshot->GetLast(), last, eps);
+        UNIT_ASSERT_EQUAL(snapshot->GetCount(), count);
+    }
+
+    Y_UNIT_TEST(Simple) {
+        {
+            TVector<double> test{05, -1.5, 0.0, 2.5, 0.25, -1.0};
+            TSummaryDoubleCollector summary;
+            for (auto value : test) {
+                summary.Collect(value);
+            }
+            CheckSnapshot(summary.Snapshot(), test);
+        }
+        {
+            TVector<double> test{-1.0, 1.0, 9.0, -5000.0, 5000.0, 5.0, -5.0};
+            TSummaryDoubleCollector summary;
+            for (auto value : test) {
+                summary.Collect(value);
+            }
+            CheckSnapshot(summary.Snapshot(), test);
+        }
+    }
+
+    Y_UNIT_TEST(RandomStressTest) {
+        const ui32 attemts = 100;
+        for (ui32 i = 0; i < attemts; ++i) {
+            const ui32 size = 100;
+            TVector<double> values(size);
+            TSummaryDoubleCollector summary;
+            for (auto& value : values) {
+                value = RandomNumber<double>() - 0.5;
+                summary.Collect(value);
+            }
+            CheckSnapshot(summary.Snapshot(), values);
+        }
+    }
+}
+
+}