media: Add unittest for MojoRenderer{Impl|Service}

media/renderers/renderer_impl_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 <stdint.h>
 
 #include <memory>
 #include <vector>
 
 #include "base/bind.h"
@@ skipping 50 matching lines @@
         video_renderer_(new StrictMock<MockVideoRenderer>()),
         audio_renderer_(new StrictMock<MockAudioRenderer>()),
         renderer_impl_(
             new RendererImpl(message_loop_.task_runner(),
                              std::unique_ptr<AudioRenderer>(audio_renderer_),
                              std::unique_ptr<VideoRenderer>(video_renderer_))),
         cdm_context_(new StrictMock<MockCdmContext>()),
         video_renderer_client_(nullptr),
         audio_renderer_client_(nullptr),
         initialization_status_(PIPELINE_OK) {
-    // SetDemuxerExpectations() adds overriding expectations for expected
-    // non-NULL streams.
+    // CreateAudioStream() and CreateVideoStream() overrides expectations for
+    // expected non-NULL streams.
     DemuxerStream* null_pointer = NULL;
     EXPECT_CALL(*demuxer_, GetStream(_))
         .WillRepeatedly(Return(null_pointer));
   }
 
   virtual ~RendererImplTest() { Destroy(); }
 
  protected:
   void Destroy() {
     renderer_impl_.reset();
@@ skipping 610 matching lines @@
       .WillOnce(
           SetBufferingState(&audio_renderer_client_, BUFFERING_HAVE_ENOUGH));
   EXPECT_CALL(*video_renderer_, StartPlayingFrom(kStartTime));
   renderer_impl_->StartPlayingFrom(kStartTime);
 
   // Nothing else should primed on the message loop.
   base::RunLoop().RunUntilIdle();
 }
 
 }  // namespace media