MSE: Log buffered audio splice generation to media-internals

content/renderer/media/render_media_log_unittest.cc

 // Copyright (c) 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "base/test/simple_test_tick_clock.h"
 #include "base/test/test_mock_time_task_runner.h"
 #include "content/common/view_messages.h"
 #include "content/public/test/mock_render_thread.h"
 #include "content/renderer/media/render_media_log.h"
 #include "testing/gtest/include/gtest/gtest.h"
@@ skipping 83 matching lines @@
   // right away.
   Advance(base::TimeDelta::FromMilliseconds(2000));
   AddEvent(media::MediaLogEvent::LOAD);
   EXPECT_EQ(2, message_count());
 }
 
 TEST_F(RenderMediaLogTest, BufferedExtents) {
   AddEvent(media::MediaLogEvent::LOAD);
   AddEvent(media::MediaLogEvent::SEEK);
 
-  // This event is handled separately and should always appear last regardless
-  // of how many times we see it.
+  // This event is handled separately and should always appear last (or next to
+  // last, if we have an audio splice statistics update, too) regardless of how
+  // many times we see it.
   AddEvent(media::MediaLogEvent::BUFFERED_EXTENTS_CHANGED);
   AddEvent(media::MediaLogEvent::BUFFERED_EXTENTS_CHANGED);
   AddEvent(media::MediaLogEvent::BUFFERED_EXTENTS_CHANGED);
 
   EXPECT_EQ(0, message_count());
   Advance(base::TimeDelta::FromMilliseconds(1000));
   EXPECT_EQ(1, message_count());
 
   // Verify contents. There should only be a single buffered extents changed
   // event.
   std::vector<media::MediaLogEvent> events = GetMediaLogEvents();
   ASSERT_EQ(3u, events.size());
   EXPECT_EQ(media::MediaLogEvent::LOAD, events[0].type);
   EXPECT_EQ(media::MediaLogEvent::SEEK, events[1].type);
   EXPECT_EQ(media::MediaLogEvent::BUFFERED_EXTENTS_CHANGED, events[2].type);
 }
 
+TEST_F(RenderMediaLogTest, BufferedAudioSpliceStatistics) {
+  AddEvent(media::MediaLogEvent::LOAD);
+  AddEvent(media::MediaLogEvent::SEEK);
+
+  // This event is handled separately and should always appear last regardless
+  // of how many times we see it.
+  AddEvent(media::MediaLogEvent::BUFFERED_AUDIO_SPLICE_STATISTICS_CHANGED);
+  AddEvent(media::MediaLogEvent::BUFFERED_AUDIO_SPLICE_STATISTICS_CHANGED);
+  AddEvent(media::MediaLogEvent::BUFFERED_AUDIO_SPLICE_STATISTICS_CHANGED);
+
+  EXPECT_EQ(0, message_count());
+  Advance(base::TimeDelta::FromMilliseconds(1000));
+  EXPECT_EQ(1, message_count());
+
+  // Verify contents. There should only be a single buffered audio splice
+  // statistics changed event.
+  std::vector<media::MediaLogEvent> events = GetMediaLogEvents();
+  ASSERT_EQ(3u, events.size());
+  EXPECT_EQ(media::MediaLogEvent::LOAD, events[0].type);
+  EXPECT_EQ(media::MediaLogEvent::SEEK, events[1].type);
+  EXPECT_EQ(media::MediaLogEvent::BUFFERED_AUDIO_SPLICE_STATISTICS_CHANGED,
+            events[2].type);
+}
+
 }  // namespace content