intermediate changes

ref:cde9a383711a11544ce7e107a78147fb96cc4029

1 files changed, 38 insertions, 0 deletions

diff --git a/library/cpp/monlib/metrics/log_histogram_collector_ut.cpp b/library/cpp/monlib/metrics/log_histogram_collector_ut.cpp
new file mode 100644
index 0000000000..ac9a3522ce
--- /dev/null
+++ b/library/cpp/monlib/metrics/log_histogram_collector_ut.cpp
@@ -0,0 +1,38 @@
+#include "log_histogram_collector.h"
+
+#include <library/cpp/testing/unittest/registar.h>
+
+Y_UNIT_TEST_SUITE(LogHistogramCollector) {
+
+    Y_UNIT_TEST(ExtendUpEmpty) {
+        NMonitoring::TLogHistogramCollector collector(-1);
+        collector.Collect(4.1944122207138854e+17);
+        auto s = collector.Snapshot();
+        UNIT_ASSERT_EQUAL(s->ZerosCount(), 0);
+        UNIT_ASSERT_EQUAL(s->StartPower(), 1);
+        UNIT_ASSERT_EQUAL(s->Count(), 100);
+        UNIT_ASSERT_EQUAL(s->Bucket(s->Count() - 1), 1);
+    }
+
+    Y_UNIT_TEST(ExtendUpNonEmpty) {
+        NMonitoring::TLogHistogramCollector collector(-1);
+        collector.Collect(0.0);
+        collector.Collect(1/(1.5*1.5*1.5));
+        collector.Collect(1/1.5);
+        auto s = collector.Snapshot();
+
+        UNIT_ASSERT_EQUAL(s->ZerosCount(), 1);
+        UNIT_ASSERT_EQUAL(s->StartPower(), -4);
+        UNIT_ASSERT_EQUAL(s->Count(), 3);
+        UNIT_ASSERT_EQUAL(s->Bucket(1), 1);
+        UNIT_ASSERT_EQUAL(s->Bucket(2), 1);
+
+        collector.Collect(4.1944122207138854e+17);
+        s = collector.Snapshot();
+        UNIT_ASSERT_EQUAL(s->ZerosCount(), 1);
+        UNIT_ASSERT_EQUAL(s->StartPower(), 1);
+        UNIT_ASSERT_EQUAL(s->Count(), 100);
+        UNIT_ASSERT_EQUAL(s->Bucket(0), 2);
+        UNIT_ASSERT_EQUAL(s->Bucket(99), 1);
+    }
+}