blob: 9e38220e01287a1b4f21e222abfbce5172253ef6 [file] [log] [blame]
/*
* Copyright (c) 2014 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 <limits>
#include "testing/gtest/include/gtest/gtest.h"
#include "webrtc/modules/pacing/bitrate_prober.h"
namespace webrtc {
TEST(BitrateProberTest, VerifyStatesAndTimeBetweenProbes) {
BitrateProber prober;
EXPECT_FALSE(prober.IsProbing());
int64_t now_ms = 0;
EXPECT_EQ(-1, prober.TimeUntilNextProbe(now_ms));
prober.SetEnabled(true);
EXPECT_FALSE(prober.IsProbing());
prober.OnIncomingPacket(300000, 1000, now_ms);
EXPECT_TRUE(prober.IsProbing());
EXPECT_EQ(0, prober.CurrentClusterId());
// First packet should probe as soon as possible.
EXPECT_EQ(0, prober.TimeUntilNextProbe(now_ms));
prober.PacketSent(now_ms, 1000);
for (int i = 0; i < 5; ++i) {
EXPECT_EQ(8, prober.TimeUntilNextProbe(now_ms));
now_ms += 4;
EXPECT_EQ(4, prober.TimeUntilNextProbe(now_ms));
now_ms += 4;
EXPECT_EQ(0, prober.TimeUntilNextProbe(now_ms));
EXPECT_EQ(0, prober.CurrentClusterId());
prober.PacketSent(now_ms, 1000);
}
for (int i = 0; i < 5; ++i) {
EXPECT_EQ(4, prober.TimeUntilNextProbe(now_ms));
now_ms += 4;
EXPECT_EQ(0, prober.TimeUntilNextProbe(now_ms));
EXPECT_EQ(1, prober.CurrentClusterId());
prober.PacketSent(now_ms, 1000);
}
EXPECT_EQ(-1, prober.TimeUntilNextProbe(now_ms));
EXPECT_FALSE(prober.IsProbing());
}
TEST(BitrateProberTest, DoesntProbeWithoutRecentPackets) {
BitrateProber prober;
EXPECT_FALSE(prober.IsProbing());
int64_t now_ms = 0;
EXPECT_EQ(-1, prober.TimeUntilNextProbe(now_ms));
prober.SetEnabled(true);
EXPECT_FALSE(prober.IsProbing());
prober.OnIncomingPacket(300000, 1000, now_ms);
EXPECT_TRUE(prober.IsProbing());
EXPECT_EQ(0, prober.TimeUntilNextProbe(now_ms));
// Let time pass, no large enough packets put into prober.
now_ms += 6000;
EXPECT_EQ(-1, prober.TimeUntilNextProbe(now_ms));
// Insert a small packet, not a candidate for probing.
prober.OnIncomingPacket(300000, 100, now_ms);
prober.PacketSent(now_ms, 100);
EXPECT_EQ(-1, prober.TimeUntilNextProbe(now_ms));
// Insert a large-enough packet after downtime while probing should reset to
// perform a new probe since the requested one didn't finish.
prober.OnIncomingPacket(300000, 1000, now_ms);
EXPECT_EQ(0, prober.TimeUntilNextProbe(now_ms));
prober.PacketSent(now_ms, 1000);
// Next packet should be part of new probe and be sent with non-zero delay.
prober.OnIncomingPacket(300000, 1000, now_ms);
EXPECT_GT(prober.TimeUntilNextProbe(now_ms), 0);
}
TEST(BitrateProberTest, DoesntInitializeProbingForSmallPackets) {
BitrateProber prober;
prober.SetEnabled(true);
EXPECT_FALSE(prober.IsProbing());
prober.OnIncomingPacket(300000, 100, 0);
EXPECT_FALSE(prober.IsProbing());
}
} // namespace webrtc