45 lines
1.5 KiB
C++
45 lines
1.5 KiB
C++
/*
|
|
* Copyright 2017 The WebRTC project authors. All Rights Reserved.
|
|
*
|
|
* Use of this source code is governed by a BSD-style license
|
|
* that can be found in the LICENSE file in the root of the source
|
|
* tree. An additional intellectual property rights grant can be found
|
|
* in the file PATENTS. All contributing project authors may
|
|
* be found in the AUTHORS file in the root of the source tree.
|
|
*/
|
|
|
|
#include "rtc_base/numerics/histogram_percentile_counter.h"
|
|
|
|
#include <cstdint>
|
|
#include <utility>
|
|
#include <vector>
|
|
|
|
#include "test/gtest.h"
|
|
|
|
TEST(HistogramPercentileCounterTest, ReturnsCorrectPercentiles) {
|
|
rtc::HistogramPercentileCounter counter(10);
|
|
const std::vector<int> kTestValues = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10,
|
|
11, 12, 13, 14, 15, 16, 17, 18, 19, 20};
|
|
|
|
EXPECT_FALSE(counter.GetPercentile(0.5f));
|
|
// Pairs of {fraction, percentile value} computed by hand
|
|
// for |kTestValues|.
|
|
const std::vector<std::pair<float, uint32_t>> kTestPercentiles = {
|
|
{0.0f, 1}, {0.01f, 1}, {0.5f, 10}, {0.9f, 18},
|
|
{0.95f, 19}, {0.99f, 20}, {1.0f, 20}};
|
|
for (int value : kTestValues) {
|
|
counter.Add(value);
|
|
}
|
|
for (const auto& test_percentile : kTestPercentiles) {
|
|
EXPECT_EQ(test_percentile.second,
|
|
counter.GetPercentile(test_percentile.first).value_or(0));
|
|
}
|
|
}
|
|
|
|
TEST(HistogramPercentileCounterTest, HandlesEmptySequence) {
|
|
rtc::HistogramPercentileCounter counter(10);
|
|
EXPECT_FALSE(counter.GetPercentile(0.5f));
|
|
counter.Add(1u);
|
|
EXPECT_TRUE(counter.GetPercentile(0.5f));
|
|
}
|