Improve bitrate probing for the audio-only case.

webrtc/modules/pacing/bitrate_prober_unittest.cc

 /*
  *  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.
  */
 
@@ skipping 70 matching lines @@
   prober.CreateProbeCluster(900000);
   EXPECT_FALSE(prober.IsProbing());
 
   prober.OnIncomingPacket(1000);
   EXPECT_TRUE(prober.IsProbing());
   EXPECT_EQ(0, prober.TimeUntilNextProbe(now_ms));
   prober.ProbeSent(now_ms, 1000);
   // 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(100);
-  EXPECT_FALSE(prober.IsProbing());
-  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(1000);
   EXPECT_EQ(0, prober.TimeUntilNextProbe(now_ms));
   prober.ProbeSent(now_ms, 1000);
   // Next packet should be part of new probe and be sent with non-zero delay.
   prober.OnIncomingPacket(1000);
   EXPECT_GT(prober.TimeUntilNextProbe(now_ms), 0);
 }
 
@@ skipping 35 matching lines @@
 TEST(BitrateProberTest, ScaleBytesUsedForProbing) {
   BitrateProber prober;
   constexpr int kBitrateBps = 10000000;  // 10 Mbps
   constexpr int kPacketSizeBytes = 1000;
   constexpr int kExpectedBytesSent = kBitrateBps * 15 / 8000;
 
   prober.CreateProbeCluster(kBitrateBps);
   prober.OnIncomingPacket(kPacketSizeBytes);
   int bytes_sent = 0;
   while (bytes_sent < kExpectedBytesSent) {
-    EXPECT_TRUE(prober.IsProbing());
+    ASSERT_TRUE(prober.IsProbing());
     prober.ProbeSent(0, kPacketSizeBytes);
     bytes_sent += kPacketSizeBytes;
   }
 
   EXPECT_FALSE(prober.IsProbing());
 }
 
 }  // namespace webrtc