Only update codec type histogram if lifetime is long enough (10 sec).

webrtc/video/send_statistics_proxy_unittest.cc

 /*
  *  Copyright (c) 2013 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 284 matching lines @@
   // No switch, stats not should be updated.
   statistics_proxy_->SetContentType(
       VideoEncoderConfig::ContentType::kRealtimeVideo);
   EXPECT_EQ(0, metrics::NumSamples("WebRTC.Video.InputWidthInPixels"));
 
   // Switch to screenshare, real-time stats should be updated.
   statistics_proxy_->SetContentType(VideoEncoderConfig::ContentType::kScreen);
   EXPECT_EQ(1, metrics::NumSamples("WebRTC.Video.InputWidthInPixels"));
 }
 
+TEST_F(SendStatisticsProxyTest, LifetimeHistogramIsUpdated) {
+  const int64_t kTimeSec = 3;
+  fake_clock_.AdvanceTimeMilliseconds(kTimeSec * 1000);
+  statistics_proxy_.reset();
+  EXPECT_EQ(1, metrics::NumSamples("WebRTC.Video.SendStreamLifetimeInSeconds"));
+  EXPECT_EQ(1, metrics::NumEvents("WebRTC.Video.SendStreamLifetimeInSeconds",
+                                  kTimeSec));
+}
+
+TEST_F(SendStatisticsProxyTest, CodecTypeHistogramIsUpdated) {
+  fake_clock_.AdvanceTimeMilliseconds(metrics::kMinRunTimeInSeconds * 1000);
+  statistics_proxy_.reset();
+  EXPECT_EQ(1, metrics::NumSamples("WebRTC.Video.Encoder.CodecType"));
+}
+
 TEST_F(SendStatisticsProxyTest, VerifyQpHistogramStats_Vp8) {
   EncodedImage encoded_image;
   CodecSpecificInfo codec_info;
   codec_info.codecType = kVideoCodecVP8;
 
   for (int i = 0; i < kMinRequiredSamples; ++i) {
     codec_info.codecSpecific.VP8.simulcastIdx = 0;
     encoded_image.qp_ = kQpIdx0;
     statistics_proxy_->OnSendEncodedImage(encoded_image, &codec_info);
     codec_info.codecSpecific.VP8.simulcastIdx = 1;
@@ skipping 405 matching lines @@
 
   EXPECT_EQ(
       1, metrics::NumSamples("WebRTC.Video.Screenshare.FecBitrateSentInKbps"));
   EXPECT_EQ(1, metrics::NumEvents(
                    "WebRTC.Video.Screenshare.FecBitrateSentInKbps",
                    static_cast<int>((rtx_counters.fec.TotalBytes() * 2 * 8) /
                                     metrics::kMinRunTimeInSeconds / 1000)));
 }
 
 }  // namespace webrtc