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/*
* Copyright (c) 2012 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 "testing/gmock/include/gmock/gmock.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "webrtc/modules/rtp_rtcp/interface/rtp_rtcp_defines.h"
#include "webrtc/system_wrappers/interface/scoped_ptr.h"
#include "webrtc/system_wrappers/interface/tick_util.h"
#include "webrtc/video_engine/call_stats.h"
using ::testing::_;
using ::testing::AnyNumber;
using ::testing::Return;
namespace webrtc {
class MockStatsObserver : public CallStatsObserver {
public:
MockStatsObserver() {}
virtual ~MockStatsObserver() {}
MOCK_METHOD1(OnRttUpdate, void(uint32_t));
};
class CallStatsTest : public ::testing::Test {
protected:
virtual void SetUp() {
TickTime::UseFakeClock(12345);
call_stats_.reset(new CallStats());
}
scoped_ptr<CallStats> call_stats_;
};
TEST_F(CallStatsTest, AddAndTriggerCallback) {
MockStatsObserver stats_observer;
RtcpRttStats* rtcp_rtt_stats = call_stats_->rtcp_rtt_stats();
call_stats_->RegisterStatsObserver(&stats_observer);
TickTime::AdvanceFakeClock(1000);
EXPECT_EQ(0U, rtcp_rtt_stats->LastProcessedRtt());
const uint32_t kRtt = 25;
rtcp_rtt_stats->OnRttUpdate(kRtt);
EXPECT_CALL(stats_observer, OnRttUpdate(kRtt))
.Times(1);
call_stats_->Process();
EXPECT_EQ(kRtt, rtcp_rtt_stats->LastProcessedRtt());
const int kRttTimeOutMs = 1500 + 10;
TickTime::AdvanceFakeClock(kRttTimeOutMs);
EXPECT_CALL(stats_observer, OnRttUpdate(_))
.Times(0);
call_stats_->Process();
EXPECT_EQ(0U, rtcp_rtt_stats->LastProcessedRtt());
call_stats_->DeregisterStatsObserver(&stats_observer);
}
TEST_F(CallStatsTest, ProcessTime) {
MockStatsObserver stats_observer;
call_stats_->RegisterStatsObserver(&stats_observer);
RtcpRttStats* rtcp_rtt_stats = call_stats_->rtcp_rtt_stats();
rtcp_rtt_stats->OnRttUpdate(100);
// Time isn't updated yet.
EXPECT_CALL(stats_observer, OnRttUpdate(_))
.Times(0);
call_stats_->Process();
// Advance clock and verify we get an update.
TickTime::AdvanceFakeClock(1000);
EXPECT_CALL(stats_observer, OnRttUpdate(_))
.Times(1);
call_stats_->Process();
// Advance clock just too little to get an update.
TickTime::AdvanceFakeClock(999);
rtcp_rtt_stats->OnRttUpdate(100);
EXPECT_CALL(stats_observer, OnRttUpdate(_))
.Times(0);
call_stats_->Process();
// Advance enough to trigger a new update.
TickTime::AdvanceFakeClock(1);
EXPECT_CALL(stats_observer, OnRttUpdate(_))
.Times(1);
call_stats_->Process();
call_stats_->DeregisterStatsObserver(&stats_observer);
}
// Verify all observers get correct estimates and observers can be added and
// removed.
TEST_F(CallStatsTest, MultipleObservers) {
MockStatsObserver stats_observer_1;
call_stats_->RegisterStatsObserver(&stats_observer_1);
// Add the second observer twice, there should still be only one report to the
// observer.
MockStatsObserver stats_observer_2;
call_stats_->RegisterStatsObserver(&stats_observer_2);
call_stats_->RegisterStatsObserver(&stats_observer_2);
RtcpRttStats* rtcp_rtt_stats = call_stats_->rtcp_rtt_stats();
const uint32_t kRtt = 100;
rtcp_rtt_stats->OnRttUpdate(kRtt);
// Verify both observers are updated.
TickTime::AdvanceFakeClock(1000);
EXPECT_CALL(stats_observer_1, OnRttUpdate(kRtt))
.Times(1);
EXPECT_CALL(stats_observer_2, OnRttUpdate(kRtt))
.Times(1);
call_stats_->Process();
// Deregister the second observer and verify update is only sent to the first
// observer.
call_stats_->DeregisterStatsObserver(&stats_observer_2);
rtcp_rtt_stats->OnRttUpdate(kRtt);
TickTime::AdvanceFakeClock(1000);
EXPECT_CALL(stats_observer_1, OnRttUpdate(kRtt))
.Times(1);
EXPECT_CALL(stats_observer_2, OnRttUpdate(kRtt))
.Times(0);
call_stats_->Process();
// Deregister the first observer.
call_stats_->DeregisterStatsObserver(&stats_observer_1);
rtcp_rtt_stats->OnRttUpdate(kRtt);
TickTime::AdvanceFakeClock(1000);
EXPECT_CALL(stats_observer_1, OnRttUpdate(kRtt))
.Times(0);
EXPECT_CALL(stats_observer_2, OnRttUpdate(kRtt))
.Times(0);
call_stats_->Process();
}
// Verify increasing and decreasing rtt triggers callbacks with correct values.
TEST_F(CallStatsTest, ChangeRtt) {
MockStatsObserver stats_observer;
call_stats_->RegisterStatsObserver(&stats_observer);
RtcpRttStats* rtcp_rtt_stats = call_stats_->rtcp_rtt_stats();
// Advance clock to be ready for an update.
TickTime::AdvanceFakeClock(1000);
// Set a first value and verify the callback is triggered.
const uint32_t kFirstRtt = 100;
rtcp_rtt_stats->OnRttUpdate(kFirstRtt);
EXPECT_CALL(stats_observer, OnRttUpdate(kFirstRtt))
.Times(1);
call_stats_->Process();
// Increase rtt and verify the new value is reported.
TickTime::AdvanceFakeClock(1000);
const uint32_t kHighRtt = kFirstRtt + 20;
rtcp_rtt_stats->OnRttUpdate(kHighRtt);
EXPECT_CALL(stats_observer, OnRttUpdate(kHighRtt))
.Times(1);
call_stats_->Process();
// Increase time enough for a new update, but not too much to make the
// rtt invalid. Report a lower rtt and verify the old/high value still is sent
// in the callback.
TickTime::AdvanceFakeClock(1000);
const uint32_t kLowRtt = kFirstRtt - 20;
rtcp_rtt_stats->OnRttUpdate(kLowRtt);
EXPECT_CALL(stats_observer, OnRttUpdate(kHighRtt))
.Times(1);
call_stats_->Process();
// Advance time to make the high report invalid, the lower rtt should now be
// in the callback.
TickTime::AdvanceFakeClock(1000);
EXPECT_CALL(stats_observer, OnRttUpdate(kLowRtt))
.Times(1);
call_stats_->Process();
call_stats_->DeregisterStatsObserver(&stats_observer);
}
TEST_F(CallStatsTest, LastProcessedRtt) {
MockStatsObserver stats_observer;
call_stats_->RegisterStatsObserver(&stats_observer);
RtcpRttStats* rtcp_rtt_stats = call_stats_->rtcp_rtt_stats();
TickTime::AdvanceFakeClock(1000);
// Set a first values and verify that LastProcessedRtt initially returns the
// average rtt.
const uint32_t kRttLow = 10;
const uint32_t kRttHigh = 30;
const uint32_t kAvgRtt = 20;
rtcp_rtt_stats->OnRttUpdate(kRttLow);
rtcp_rtt_stats->OnRttUpdate(kRttHigh);
EXPECT_CALL(stats_observer, OnRttUpdate(kRttHigh))
.Times(1);
call_stats_->Process();
EXPECT_EQ(kAvgRtt, rtcp_rtt_stats->LastProcessedRtt());
// Update values and verify LastProcessedRtt.
TickTime::AdvanceFakeClock(1000);
rtcp_rtt_stats->OnRttUpdate(kRttLow);
rtcp_rtt_stats->OnRttUpdate(kRttHigh);
EXPECT_CALL(stats_observer, OnRttUpdate(kRttHigh))
.Times(1);
call_stats_->Process();
EXPECT_EQ(kAvgRtt, rtcp_rtt_stats->LastProcessedRtt());
call_stats_->DeregisterStatsObserver(&stats_observer);
}
} // namespace webrtc
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