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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 "modules/congestion_controller/goog_cc/congestion_window_pushback_controller.h"
#include <cstdint>
#include <memory>
#include "api/units/data_size.h"
#include "test/explicit_key_value_config.h"
#include "test/gmock.h"
#include "test/gtest.h"
namespace webrtc {
namespace test {
using ::testing::_;
TEST(CongestionWindowPushbackControllerTest, FullCongestionWindow) {
CongestionWindowPushbackController cwnd_controller(
ExplicitKeyValueConfig(""));
cwnd_controller.UpdateOutstandingData(100000);
cwnd_controller.SetDataWindow(DataSize::Bytes(50000));
uint32_t bitrate_bps = 80000;
bitrate_bps = cwnd_controller.UpdateTargetBitrate(bitrate_bps);
EXPECT_EQ(72000u, bitrate_bps);
cwnd_controller.SetDataWindow(DataSize::Bytes(50000));
bitrate_bps = cwnd_controller.UpdateTargetBitrate(bitrate_bps);
EXPECT_EQ(static_cast<uint32_t>(72000 * 0.9 * 0.9), bitrate_bps);
}
TEST(CongestionWindowPushbackControllerTest, NormalCongestionWindow) {
CongestionWindowPushbackController cwnd_controller(
ExplicitKeyValueConfig(""));
cwnd_controller.UpdateOutstandingData(199999);
cwnd_controller.SetDataWindow(DataSize::Bytes(200000));
uint32_t bitrate_bps = 80000;
bitrate_bps = cwnd_controller.UpdateTargetBitrate(bitrate_bps);
EXPECT_EQ(80000u, bitrate_bps);
}
TEST(CongestionWindowPushbackControllerTest, LowBitrate) {
CongestionWindowPushbackController cwnd_controller(
ExplicitKeyValueConfig(""));
cwnd_controller.UpdateOutstandingData(100000);
cwnd_controller.SetDataWindow(DataSize::Bytes(50000));
uint32_t bitrate_bps = 35000;
bitrate_bps = cwnd_controller.UpdateTargetBitrate(bitrate_bps);
EXPECT_EQ(static_cast<uint32_t>(35000 * 0.9), bitrate_bps);
cwnd_controller.SetDataWindow(DataSize::Bytes(20000));
bitrate_bps = cwnd_controller.UpdateTargetBitrate(bitrate_bps);
EXPECT_EQ(30000u, bitrate_bps);
}
TEST(CongestionWindowPushbackControllerTest, NoPushbackOnDataWindowUnset) {
CongestionWindowPushbackController cwnd_controller(
ExplicitKeyValueConfig(""));
cwnd_controller.UpdateOutstandingData(1e8); // Large number
uint32_t bitrate_bps = 80000;
bitrate_bps = cwnd_controller.UpdateTargetBitrate(bitrate_bps);
EXPECT_EQ(80000u, bitrate_bps);
}
TEST(CongestionWindowPushbackControllerTest, PushbackOnInititialDataWindow) {
CongestionWindowPushbackController cwnd_controller(
ExplicitKeyValueConfig("WebRTC-CongestionWindow/InitWin:100000/"));
cwnd_controller.UpdateOutstandingData(1e8); // Large number
uint32_t bitrate_bps = 80000;
bitrate_bps = cwnd_controller.UpdateTargetBitrate(bitrate_bps);
EXPECT_GT(80000u, bitrate_bps);
}
TEST(CongestionWindowPushbackControllerTest, PushbackDropFrame) {
CongestionWindowPushbackController cwnd_controller(
ExplicitKeyValueConfig("WebRTC-CongestionWindow/DropFrame:true/"));
cwnd_controller.UpdateOutstandingData(1e8); // Large number
cwnd_controller.SetDataWindow(DataSize::Bytes(50000));
uint32_t bitrate_bps = 80000;
bitrate_bps = cwnd_controller.UpdateTargetBitrate(bitrate_bps);
EXPECT_GT(80000u, bitrate_bps);
}
} // namespace test
} // namespace webrtc
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