rocksdb/util/histogram_test.cc

63 lines
1.6 KiB
C++
Raw Normal View History

// Copyright (c) 2013, Facebook, Inc. All rights reserved.
// This source code is licensed under the BSD-style license found in the
// LICENSE file in the root directory of this source tree. An additional grant
// of patent rights can be found in the PATENTS file in the same directory.
//
#include "util/histogram.h"
#include "util/testharness.h"
namespace rocksdb {
class HistogramTest { };
TEST(HistogramTest, BasicOperation) {
HistogramImpl histogram;
for (uint64_t i = 1; i <= 100; i++) {
histogram.Add(i);
}
{
double median = histogram.Median();
// ASSERT_LE(median, 50);
ASSERT_GT(median, 0);
}
{
double percentile100 = histogram.Percentile(100.0);
ASSERT_LE(percentile100, 100.0);
ASSERT_GT(percentile100, 0.0);
double percentile99 = histogram.Percentile(99.0);
double percentile85 = histogram.Percentile(85.0);
ASSERT_LE(percentile99, 99.0);
ASSERT_TRUE(percentile99 >= percentile85);
}
ASSERT_EQ(histogram.Average(), 50.5); // avg is acurately caluclated.
}
TEST(HistogramTest, EmptyHistogram) {
HistogramImpl histogram;
ASSERT_EQ(histogram.Median(), 0.0);
ASSERT_EQ(histogram.Percentile(85.0), 0.0);
ASSERT_EQ(histogram.Average(), 0.0);
}
TEST(HistogramTest, ClearHistogram) {
HistogramImpl histogram;
for (uint64_t i = 1; i <= 100; i++) {
histogram.Add(i);
}
histogram.Clear();
ASSERT_EQ(histogram.Median(), 0);
ASSERT_EQ(histogram.Percentile(85.0), 0);
ASSERT_EQ(histogram.Average(), 0);
}
} // namespace rocksdb
int main(int argc, char** argv) {
return rocksdb::test::RunAllTests();
}