Extract bitrate allocation of spatial/temporal layers out of codec impl.

webrtc/video/vie_encoder_unittest.cc

Index: webrtc/video/vie_encoder_unittest.cc
diff --git a/webrtc/video/vie_encoder_unittest.cc b/webrtc/video/vie_encoder_unittest.cc
index 9f4fdc47e33094d3577dbe4f05eb226bfb37a173..f6046be652c0f5e3fdc0df8f7df82057560224e6 100644
--- a/webrtc/video/vie_encoder_unittest.cc
+++ b/webrtc/video/vie_encoder_unittest.cc
@@ -93,6 +93,7 @@ class ViEEncoderTest : public ::testing::Test {
 
     VideoEncoderConfig video_encoder_config;
     test::FillEncoderConfiguration(1, &video_encoder_config);
+    video_encoder_config_ = video_encoder_config.Copy();
     vie_encoder_.reset(new ViEEncoderUnderTest(
         stats_proxy_.get(), video_send_config_.encoder_settings));
     vie_encoder_->SetSink(&sink_, false /* rotation_applied */);
@@ -236,6 +237,7 @@ class ViEEncoderTest : public ::testing::Test {
   };
 
   VideoSendStream::Config video_send_config_;
+  VideoEncoderConfig video_encoder_config_;
   int codec_width_;
   int codec_height_;
   TestEncoder fake_encoder_;
@@ -595,6 +597,20 @@ TEST_F(ViEEncoderTest, StatsTracksAdaptationStatsWhenSwitchingSource) {
   vie_encoder_->Stop();
 }
 
+TEST_F(ViEEncoderTest, StatsTracksPreferredBitrate) {
+  const int kTargetBitrateBps = 100000;
+  vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0);
+
+  video_source_.IncomingCapturedFrame(CreateFrame(1, 1280, 720));
+  sink_.WaitForEncodedFrame(1);
+
+  VideoSendStream::Stats stats = stats_proxy_->GetStats();
+  EXPECT_EQ(video_encoder_config_.max_bitrate_bps,
+            stats.preferred_media_bitrate_bps);
+
+  vie_encoder_->Stop();
+}
+
 TEST_F(ViEEncoderTest, UMACpuLimitedResolutionInPercent) {
   const int kTargetBitrateBps = 100000;
   vie_encoder_->OnBitrateUpdated(kTargetBitrateBps, 0, 0);