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/*
* Copyright (c) 2018 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/moving_average.h"
#include <optional>
#include "test/gtest.h"
namespace test {
TEST(MovingAverageTest, EmptyAverage) {
webrtc::MovingAverage moving_average(1);
EXPECT_EQ(0u, moving_average.Size());
EXPECT_EQ(std::nullopt, moving_average.GetAverageRoundedDown());
}
// Test single value.
TEST(MovingAverageTest, OneElement) {
webrtc::MovingAverage moving_average(1);
moving_average.AddSample(3);
EXPECT_EQ(1u, moving_average.Size());
EXPECT_EQ(3, *moving_average.GetAverageRoundedDown());
}
TEST(MovingAverageTest, GetAverage) {
webrtc::MovingAverage moving_average(1024);
moving_average.AddSample(1);
moving_average.AddSample(1);
moving_average.AddSample(3);
moving_average.AddSample(3);
EXPECT_EQ(*moving_average.GetAverageRoundedDown(), 2);
EXPECT_EQ(*moving_average.GetAverageRoundedToClosest(), 2);
}
TEST(MovingAverageTest, GetAverageRoundedDownRounds) {
webrtc::MovingAverage moving_average(1024);
moving_average.AddSample(1);
moving_average.AddSample(2);
moving_average.AddSample(2);
moving_average.AddSample(2);
EXPECT_EQ(*moving_average.GetAverageRoundedDown(), 1);
}
TEST(MovingAverageTest, GetAverageRoundedToClosestRounds) {
webrtc::MovingAverage moving_average(1024);
moving_average.AddSample(1);
moving_average.AddSample(2);
moving_average.AddSample(2);
moving_average.AddSample(2);
EXPECT_EQ(*moving_average.GetAverageRoundedToClosest(), 2);
}
TEST(MovingAverageTest, Reset) {
webrtc::MovingAverage moving_average(5);
moving_average.AddSample(1);
EXPECT_EQ(1, *moving_average.GetAverageRoundedDown());
EXPECT_EQ(1, *moving_average.GetAverageRoundedToClosest());
moving_average.Reset();
EXPECT_FALSE(moving_average.GetAverageRoundedDown());
moving_average.AddSample(10);
EXPECT_EQ(10, *moving_average.GetAverageRoundedDown());
EXPECT_EQ(10, *moving_average.GetAverageRoundedToClosest());
}
TEST(MovingAverageTest, ManySamples) {
webrtc::MovingAverage moving_average(10);
for (int i = 1; i < 11; i++) {
moving_average.AddSample(i);
}
EXPECT_EQ(*moving_average.GetAverageRoundedDown(), 5);
EXPECT_EQ(*moving_average.GetAverageRoundedToClosest(), 6);
for (int i = 1; i < 2001; i++) {
moving_average.AddSample(i);
}
EXPECT_EQ(*moving_average.GetAverageRoundedDown(), 1995);
EXPECT_EQ(*moving_average.GetAverageRoundedToClosest(), 1996);
}
} // namespace test
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