mirror of
https://github.com/mollyim/webrtc.git
synced 2025-05-14 06:10:40 +01:00
e6f6a0cb8d
Add missing copy and move operator= and GetVariance and GetStandardDeviation methods to the SamplesStatsCounter. Change-Id: I02374aac23a00fdeefda16012311cd860bb4b1b5 Bug: webrtc:10138 Reviewed-on: https://webrtc-review.googlesource.com/c/121653 Commit-Queue: Artem Titov <titovartem@webrtc.org> Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Cr-Commit-Position: refs/heads/master@{#26584}
78 lines
2.1 KiB
C++
78 lines
2.1 KiB
C++
/*
|
|
* Copyright (c) 2016 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/samples_stats_counter.h"
|
|
|
|
#include <math.h>
|
|
#include <algorithm>
|
|
#include <vector>
|
|
|
|
#include "test/gtest.h"
|
|
|
|
namespace webrtc {
|
|
namespace {
|
|
|
|
SamplesStatsCounter CreateStatsFilledWithIntsFrom1ToN(int n) {
|
|
std::vector<double> data;
|
|
for (int i = 1; i <= n; i++) {
|
|
data.push_back(i);
|
|
}
|
|
std::random_shuffle(data.begin(), data.end());
|
|
|
|
SamplesStatsCounter stats;
|
|
for (double v : data) {
|
|
stats.AddSample(v);
|
|
}
|
|
return stats;
|
|
}
|
|
|
|
} // namespace
|
|
|
|
TEST(SamplesStatsCounter, FullSimpleTest) {
|
|
SamplesStatsCounter stats = CreateStatsFilledWithIntsFrom1ToN(100);
|
|
|
|
EXPECT_TRUE(!stats.IsEmpty());
|
|
EXPECT_DOUBLE_EQ(stats.GetMin(), 1.0);
|
|
EXPECT_DOUBLE_EQ(stats.GetMax(), 100.0);
|
|
EXPECT_DOUBLE_EQ(stats.GetAverage(), 50.5);
|
|
for (int i = 1; i <= 100; i++) {
|
|
double p = i / 100.0;
|
|
EXPECT_GE(stats.GetPercentile(p), i);
|
|
EXPECT_LT(stats.GetPercentile(p), i + 1);
|
|
}
|
|
}
|
|
|
|
TEST(SamplesStatsCounter, VarianceAndDeviation) {
|
|
SamplesStatsCounter stats;
|
|
stats.AddSample(2);
|
|
stats.AddSample(2);
|
|
stats.AddSample(-1);
|
|
stats.AddSample(5);
|
|
|
|
EXPECT_DOUBLE_EQ(stats.GetAverage(), 2.0);
|
|
EXPECT_DOUBLE_EQ(stats.GetVariance(), 4.5);
|
|
EXPECT_DOUBLE_EQ(stats.GetStandardDeviation(), sqrt(4.5));
|
|
}
|
|
|
|
TEST(SamplesStatsCounter, FractionPercentile) {
|
|
SamplesStatsCounter stats = CreateStatsFilledWithIntsFrom1ToN(5);
|
|
|
|
EXPECT_DOUBLE_EQ(stats.GetPercentile(0.5), 3);
|
|
}
|
|
|
|
TEST(SamplesStatsCounter, TestBorderValues) {
|
|
SamplesStatsCounter stats = CreateStatsFilledWithIntsFrom1ToN(5);
|
|
|
|
EXPECT_GE(stats.GetPercentile(0.01), 1);
|
|
EXPECT_LT(stats.GetPercentile(0.01), 2);
|
|
EXPECT_DOUBLE_EQ(stats.GetPercentile(1.0), 5);
|
|
}
|
|
|
|
} // namespace webrtc
|