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/*
* Copyright (c) 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/moving_max_counter.h"
#include "test/gtest.h"
TEST(MovingMaxCounter, ReportsMaximumInTheWindow) {
webrtc::MovingMaxCounter<int> counter(100);
counter.Add(1, 1);
EXPECT_EQ(counter.Max(1), 1);
counter.Add(2, 30);
EXPECT_EQ(counter.Max(30), 2);
counter.Add(100, 60);
EXPECT_EQ(counter.Max(60), 100);
counter.Add(4, 70);
EXPECT_EQ(counter.Max(70), 100);
counter.Add(5, 90);
EXPECT_EQ(counter.Max(90), 100);
}
TEST(MovingMaxCounter, IgnoresOldElements) {
webrtc::MovingMaxCounter<int> counter(100);
counter.Add(1, 1);
counter.Add(2, 30);
counter.Add(100, 60);
counter.Add(4, 70);
counter.Add(5, 90);
EXPECT_EQ(counter.Max(160), 100);
// 100 is now out of the window. Next maximum is 5.
EXPECT_EQ(counter.Max(161), 5);
}
TEST(MovingMaxCounter, HandlesEmptyWindow) {
webrtc::MovingMaxCounter<int> counter(100);
counter.Add(123, 1);
EXPECT_TRUE(counter.Max(101).has_value());
EXPECT_FALSE(counter.Max(102).has_value());
}
TEST(MovingMaxCounter, HandlesSamplesWithEqualTimestamps) {
webrtc::MovingMaxCounter<int> counter(100);
counter.Add(2, 30);
EXPECT_EQ(counter.Max(30), 2);
counter.Add(5, 30);
EXPECT_EQ(counter.Max(30), 5);
counter.Add(4, 30);
EXPECT_EQ(counter.Max(30), 5);
counter.Add(1, 90);
EXPECT_EQ(counter.Max(150), 1);
}
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