VideoTrackAdapter: Add passing frames monitor, notify MSVCS -> MSVTrack(s)

content/renderer/media/media_stream_video_source_unittest.cc

 // Copyright 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 <string>
 #include <vector>
 
 #include "base/bind.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/utf_string_conversions.h"
 #include "content/child/child_process.h"
 #include "content/renderer/media/media_stream_video_source.h"
 #include "content/renderer/media/media_stream_video_track.h"
 #include "content/renderer/media/mock_media_constraint_factory.h"
 #include "content/renderer/media/mock_media_stream_video_sink.h"
 #include "content/renderer/media/mock_media_stream_video_source.h"
 #include "media/base/video_frame.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
+using ::testing::_;
+using ::testing::DoAll;
+using ::testing::SaveArg;
+
 namespace content {
 
 ACTION_P(RunClosure, closure) {
   closure.Run();
 }
 
 class MediaStreamVideoSourceTest
     : public ::testing::Test {
  public:
   MediaStreamVideoSourceTest()
@@ skipping 681 matching lines @@
   EXPECT_EQ(0, sink.number_of_frames());
   DeliverVideoFrameAndWaitForRenderer(320, 240, &sink);
   EXPECT_EQ(1, sink.number_of_frames());
   // Expect the delivered frame to be passed unchanged since its smaller than
   // max requested.
   EXPECT_EQ(320, sink.frame_size().width());
   EXPECT_EQ(240, sink.frame_size().height());
   MediaStreamVideoSink::RemoveFromVideoTrack(&sink, track);
 }
 
+// Test that a source producing no frames calls back the MSVCS to tell so.
+TEST_F(MediaStreamVideoSourceTest, MutedSource) {
+  MockMediaConstraintFactory factory;
+  blink::WebMediaStreamTrack track =
+      CreateTrackAndStartSource(factory.CreateWebMediaConstraints(),
+                                640, 480, 30);
+
+  MockMediaStreamVideoSink sink;
+  MediaStreamVideoSink::AddToVideoTrack(&sink, sink.GetDeliverFrameCB(), track);
+
+  base::RunLoop run_loop;
+  base::Closure quit_closure = run_loop.QuitClosure();
+  bool muted_state = false;
+  EXPECT_CALL(*mock_source(), SetMutedState(_))
+      .WillOnce(DoAll(SaveArg<0>(&muted_state), RunClosure(quit_closure)));
+  run_loop.Run();
+  // TODO(mcasas): When added, check |track|'s (WebMediaStreamTrack) Muted
+  // attribute, should be false.
+  EXPECT_EQ(muted_state, true);
+
+  MediaStreamVideoSink::RemoveFromVideoTrack(&sink, track);
+}
+
 }  // namespace content