media/renderers/renderer_impl_unittest.cc

   1 // Copyright 2014 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include <vector>
   6
   7 #include "base/bind.h"
   8 #include "base/message_loop/message_loop.h"
   9 #include "base/run_loop.h"
  10 #include "base/test/simple_test_tick_clock.h"
  11 #include "media/base/gmock_callback_support.h"
  12 #include "media/base/mock_filters.h"
  13 #include "media/base/test_helpers.h"
  14 #include "media/renderers/renderer_impl.h"
  15 #include "testing/gtest/include/gtest/gtest.h"
  16
  17 using ::testing::_;
  18 using ::testing::DoAll;
  19 using ::testing::InSequence;
  20 using ::testing::Mock;
  21 using ::testing::Return;
  22 using ::testing::SaveArg;
  23 using ::testing::StrictMock;
  24
  25 namespace media {
  26
  27 const int64 kStartPlayingTimeInMs = 100;
  28
  29 ACTION_P2(SetBufferingState, cb, buffering_state) {
  30   cb->Run(buffering_state);
  31 }
  32
  33 ACTION_P2(AudioError, cb, error) {
  34   cb->Run(error);
  35 }
  36
  37 class RendererImplTest : public ::testing::Test {
  38  public:
  39   // Used for setting expectations on pipeline callbacks. Using a StrictMock
  40   // also lets us test for missing callbacks.
  41   class CallbackHelper {
  42    public:
  43     CallbackHelper() {}
  44     virtual ~CallbackHelper() {}
  45
  46     MOCK_METHOD1(OnInitialize, void(PipelineStatus));
  47     MOCK_METHOD0(OnFlushed, void());
  48     MOCK_METHOD0(OnEnded, void());
  49     MOCK_METHOD1(OnError, void(PipelineStatus));
  50     MOCK_METHOD1(OnUpdateStatistics, void(const PipelineStatistics&));
  51     MOCK_METHOD1(OnBufferingStateChange, void(BufferingState));
  52     MOCK_METHOD0(OnWaitingForDecryptionKey, void());
  53
  54    private:
  55     DISALLOW_COPY_AND_ASSIGN(CallbackHelper);
  56   };
  57
  58   RendererImplTest()
  59       : demuxer_(new StrictMock<MockDemuxer>()),
  60         video_renderer_(new StrictMock<MockVideoRenderer>()),
  61         audio_renderer_(new StrictMock<MockAudioRenderer>()),
  62         renderer_impl_(
  63             new RendererImpl(message_loop_.message_loop_proxy(),
  64                              scoped_ptr<AudioRenderer>(audio_renderer_),
  65                              scoped_ptr<VideoRenderer>(video_renderer_))) {
  66     // SetDemuxerExpectations() adds overriding expectations for expected
  67     // non-NULL streams.
  68     DemuxerStream* null_pointer = NULL;
  69     EXPECT_CALL(*demuxer_, GetStream(_))
  70         .WillRepeatedly(Return(null_pointer));
  71   }
  72
  73   virtual ~RendererImplTest() {
  74     renderer_impl_.reset();
  75     base::RunLoop().RunUntilIdle();
  76   }
  77
  78  protected:
  79   typedef std::vector<MockDemuxerStream*> MockDemuxerStreamVector;
  80
  81   scoped_ptr<StrictMock<MockDemuxerStream> > CreateStream(
  82       DemuxerStream::Type type) {
  83     scoped_ptr<StrictMock<MockDemuxerStream> > stream(
  84         new StrictMock<MockDemuxerStream>(type));
  85     return stream.Pass();
  86   }
  87
  88   // Sets up expectations to allow the audio renderer to initialize.
  89   void SetAudioRendererInitializeExpectations(PipelineStatus status) {
  90     EXPECT_CALL(*audio_renderer_,
  91                 Initialize(audio_stream_.get(), _, _, _, _, _, _, _))
  92         .WillOnce(DoAll(SaveArg<4>(&audio_buffering_state_cb_),
  93                         SaveArg<5>(&audio_ended_cb_),
  94                         SaveArg<6>(&audio_error_cb_), RunCallback<1>(status)));
  95   }
  96
  97   // Sets up expectations to allow the video renderer to initialize.
  98   void SetVideoRendererInitializeExpectations(PipelineStatus status) {
  99     EXPECT_CALL(*video_renderer_,
 100                 Initialize(video_stream_.get(), _, _, _, _, _, _, _, _))
 101         .WillOnce(DoAll(SaveArg<4>(&video_buffering_state_cb_),
 102                         SaveArg<5>(&video_ended_cb_), RunCallback<1>(status)));
 103   }
 104
 105   void InitializeAndExpect(PipelineStatus start_status) {
 106     EXPECT_CALL(callbacks_, OnInitialize(start_status));
 107     EXPECT_CALL(callbacks_, OnWaitingForDecryptionKey()).Times(0);
 108
 109     if (start_status == PIPELINE_OK && audio_stream_) {
 110       EXPECT_CALL(*audio_renderer_, GetTimeSource())
 111           .WillOnce(Return(&time_source_));
 112     } else {
 113       renderer_impl_->set_time_source_for_testing(&time_source_);
 114     }
 115
 116     renderer_impl_->Initialize(
 117         demuxer_.get(),
 118         base::Bind(&CallbackHelper::OnInitialize,
 119                    base::Unretained(&callbacks_)),
 120         base::Bind(&CallbackHelper::OnUpdateStatistics,
 121                    base::Unretained(&callbacks_)),
 122         base::Bind(&CallbackHelper::OnBufferingStateChange,
 123                    base::Unretained(&callbacks_)),
 124         base::Bind(&CallbackHelper::OnEnded, base::Unretained(&callbacks_)),
 125         base::Bind(&CallbackHelper::OnError, base::Unretained(&callbacks_)),
 126         base::Bind(&CallbackHelper::OnWaitingForDecryptionKey,
 127                    base::Unretained(&callbacks_)));
 128     base::RunLoop().RunUntilIdle();
 129   }
 130
 131   void CreateAudioStream() {
 132     audio_stream_ = CreateStream(DemuxerStream::AUDIO);
 133     streams_.push_back(audio_stream_.get());
 134     EXPECT_CALL(*demuxer_, GetStream(DemuxerStream::AUDIO))
 135         .WillRepeatedly(Return(audio_stream_.get()));
 136   }
 137
 138   void CreateVideoStream() {
 139     video_stream_ = CreateStream(DemuxerStream::VIDEO);
 140     video_stream_->set_video_decoder_config(video_decoder_config_);
 141     streams_.push_back(video_stream_.get());
 142     EXPECT_CALL(*demuxer_, GetStream(DemuxerStream::VIDEO))
 143         .WillRepeatedly(Return(video_stream_.get()));
 144   }
 145
 146   void CreateAudioAndVideoStream() {
 147     CreateAudioStream();
 148     CreateVideoStream();
 149   }
 150
 151   void InitializeWithAudio() {
 152     CreateAudioStream();
 153     SetAudioRendererInitializeExpectations(PIPELINE_OK);
 154     InitializeAndExpect(PIPELINE_OK);
 155   }
 156
 157   void InitializeWithVideo() {
 158     CreateVideoStream();
 159     SetVideoRendererInitializeExpectations(PIPELINE_OK);
 160     InitializeAndExpect(PIPELINE_OK);
 161   }
 162
 163   void InitializeWithAudioAndVideo() {
 164     CreateAudioAndVideoStream();
 165     SetAudioRendererInitializeExpectations(PIPELINE_OK);
 166     SetVideoRendererInitializeExpectations(PIPELINE_OK);
 167     InitializeAndExpect(PIPELINE_OK);
 168   }
 169
 170   void Play() {
 171     DCHECK(audio_stream_ || video_stream_);
 172     EXPECT_CALL(callbacks_, OnBufferingStateChange(BUFFERING_HAVE_ENOUGH));
 173
 174     base::TimeDelta start_time(
 175         base::TimeDelta::FromMilliseconds(kStartPlayingTimeInMs));
 176     EXPECT_CALL(time_source_, SetMediaTime(start_time));
 177     EXPECT_CALL(time_source_, StartTicking());
 178
 179     if (audio_stream_) {
 180       EXPECT_CALL(*audio_renderer_, StartPlaying())
 181           .WillOnce(SetBufferingState(&audio_buffering_state_cb_,
 182                                       BUFFERING_HAVE_ENOUGH));
 183     }
 184
 185     if (video_stream_) {
 186       EXPECT_CALL(*video_renderer_, StartPlayingFrom(start_time))
 187           .WillOnce(SetBufferingState(&video_buffering_state_cb_,
 188                                       BUFFERING_HAVE_ENOUGH));
 189     }
 190
 191     renderer_impl_->StartPlayingFrom(start_time);
 192     base::RunLoop().RunUntilIdle();
 193   }
 194
 195   void Flush(bool underflowed) {
 196     if (!underflowed)
 197       EXPECT_CALL(time_source_, StopTicking());
 198
 199     if (audio_stream_) {
 200       EXPECT_CALL(*audio_renderer_, Flush(_))
 201           .WillOnce(DoAll(SetBufferingState(&audio_buffering_state_cb_,
 202                                             BUFFERING_HAVE_NOTHING),
 203                           RunClosure<0>()));
 204     }
 205
 206     if (video_stream_) {
 207       EXPECT_CALL(*video_renderer_, Flush(_))
 208           .WillOnce(DoAll(SetBufferingState(&video_buffering_state_cb_,
 209                                             BUFFERING_HAVE_NOTHING),
 210                           RunClosure<0>()));
 211     }
 212
 213     EXPECT_CALL(callbacks_, OnFlushed());
 214
 215     renderer_impl_->Flush(
 216         base::Bind(&CallbackHelper::OnFlushed, base::Unretained(&callbacks_)));
 217     base::RunLoop().RunUntilIdle();
 218   }
 219
 220   void SetPlaybackRate(double playback_rate) {
 221     EXPECT_CALL(time_source_, SetPlaybackRate(playback_rate));
 222     renderer_impl_->SetPlaybackRate(playback_rate);
 223     base::RunLoop().RunUntilIdle();
 224   }
 225
 226   int64 GetMediaTimeMs() {
 227     return renderer_impl_->GetMediaTime().InMilliseconds();
 228   }
 229
 230   bool IsMediaTimeAdvancing(double playback_rate) {
 231     int64 start_time_ms = GetMediaTimeMs();
 232     const int64 time_to_advance_ms = 100;
 233
 234     test_tick_clock_.Advance(
 235         base::TimeDelta::FromMilliseconds(time_to_advance_ms));
 236
 237     if (GetMediaTimeMs() == start_time_ms + time_to_advance_ms * playback_rate)
 238       return true;
 239
 240     DCHECK_EQ(start_time_ms, GetMediaTimeMs());
 241     return false;
 242   }
 243
 244   bool IsMediaTimeAdvancing() {
 245     return IsMediaTimeAdvancing(1.0);
 246   }
 247
 248   // Fixture members.
 249   base::MessageLoop message_loop_;
 250   StrictMock<CallbackHelper> callbacks_;
 251   base::SimpleTestTickClock test_tick_clock_;
 252
 253   scoped_ptr<StrictMock<MockDemuxer> > demuxer_;
 254   StrictMock<MockVideoRenderer>* video_renderer_;
 255   StrictMock<MockAudioRenderer>* audio_renderer_;
 256   scoped_ptr<RendererImpl> renderer_impl_;
 257
 258   StrictMock<MockTimeSource> time_source_;
 259   scoped_ptr<StrictMock<MockDemuxerStream> > audio_stream_;
 260   scoped_ptr<StrictMock<MockDemuxerStream> > video_stream_;
 261   MockDemuxerStreamVector streams_;
 262   BufferingStateCB audio_buffering_state_cb_;
 263   BufferingStateCB video_buffering_state_cb_;
 264   base::Closure audio_ended_cb_;
 265   base::Closure video_ended_cb_;
 266   PipelineStatusCB audio_error_cb_;
 267   VideoDecoderConfig video_decoder_config_;
 268
 269  private:
 270   DISALLOW_COPY_AND_ASSIGN(RendererImplTest);
 271 };
 272
 273 TEST_F(RendererImplTest, DestroyBeforeInitialize) {
 274   // |renderer_impl_| will be destroyed in the dtor.
 275 }
 276
 277 TEST_F(RendererImplTest, InitializeWithAudio) {
 278   InitializeWithAudio();
 279 }
 280
 281 TEST_F(RendererImplTest, InitializeWithVideo) {
 282   InitializeWithVideo();
 283 }
 284
 285 TEST_F(RendererImplTest, InitializeWithAudioVideo) {
 286   InitializeWithAudioAndVideo();
 287 }
 288
 289 TEST_F(RendererImplTest, InitializeWithAudio_Failed) {
 290   CreateAudioStream();
 291   SetAudioRendererInitializeExpectations(PIPELINE_ERROR_INITIALIZATION_FAILED);
 292   InitializeAndExpect(PIPELINE_ERROR_INITIALIZATION_FAILED);
 293 }
 294
 295 TEST_F(RendererImplTest, InitializeWithVideo_Failed) {
 296   CreateVideoStream();
 297   SetVideoRendererInitializeExpectations(PIPELINE_ERROR_INITIALIZATION_FAILED);
 298   InitializeAndExpect(PIPELINE_ERROR_INITIALIZATION_FAILED);
 299 }
 300
 301 TEST_F(RendererImplTest, InitializeWithAudioVideo_AudioRendererFailed) {
 302   CreateAudioAndVideoStream();
 303   SetAudioRendererInitializeExpectations(PIPELINE_ERROR_INITIALIZATION_FAILED);
 304   // VideoRenderer::Initialize() should not be called.
 305   InitializeAndExpect(PIPELINE_ERROR_INITIALIZATION_FAILED);
 306 }
 307
 308 TEST_F(RendererImplTest, InitializeWithAudioVideo_VideoRendererFailed) {
 309   CreateAudioAndVideoStream();
 310   SetAudioRendererInitializeExpectations(PIPELINE_OK);
 311   SetVideoRendererInitializeExpectations(PIPELINE_ERROR_INITIALIZATION_FAILED);
 312   InitializeAndExpect(PIPELINE_ERROR_INITIALIZATION_FAILED);
 313 }
 314
 315 TEST_F(RendererImplTest, StartPlayingFrom) {
 316   InitializeWithAudioAndVideo();
 317   Play();
 318 }
 319
 320 TEST_F(RendererImplTest, StartPlayingFromWithPlaybackRate) {
 321   InitializeWithAudioAndVideo();
 322
 323   // Play with a zero playback rate shouldn't start time.
 324   Play();
 325   Mock::VerifyAndClearExpectations(video_renderer_);
 326
 327   // Positive playback rate when ticking should start time.
 328   EXPECT_CALL(*video_renderer_, OnTimeStateChanged(true));
 329   SetPlaybackRate(1.0);
 330   Mock::VerifyAndClearExpectations(video_renderer_);
 331
 332   // Double notifications shouldn't be sent.
 333   SetPlaybackRate(1.0);
 334   Mock::VerifyAndClearExpectations(video_renderer_);
 335
 336   // Zero playback rate should stop time.
 337   EXPECT_CALL(*video_renderer_, OnTimeStateChanged(false));
 338   SetPlaybackRate(0.0);
 339   Mock::VerifyAndClearExpectations(video_renderer_);
 340
 341   // Double notifications shouldn't be sent.
 342   SetPlaybackRate(0.0);
 343   Mock::VerifyAndClearExpectations(video_renderer_);
 344
 345   // Starting playback and flushing should cause time to stop.
 346   EXPECT_CALL(*video_renderer_, OnTimeStateChanged(true));
 347   EXPECT_CALL(*video_renderer_, OnTimeStateChanged(false));
 348   SetPlaybackRate(1.0);
 349   Flush(false);
 350
 351   // A positive playback rate when playback isn't started should do nothing.
 352   SetPlaybackRate(1.0);
 353 }
 354
 355 TEST_F(RendererImplTest, FlushAfterInitialization) {
 356   InitializeWithAudioAndVideo();
 357   Flush(true);
 358 }
 359
 360 TEST_F(RendererImplTest, FlushAfterPlay) {
 361   InitializeWithAudioAndVideo();
 362   Play();
 363   Flush(false);
 364 }
 365
 366 TEST_F(RendererImplTest, FlushAfterUnderflow) {
 367   InitializeWithAudioAndVideo();
 368   Play();
 369
 370   // Simulate underflow.
 371   EXPECT_CALL(time_source_, StopTicking());
 372   audio_buffering_state_cb_.Run(BUFFERING_HAVE_NOTHING);
 373
 374   // Flush while underflowed. We shouldn't call StopTicking() again.
 375   Flush(true);
 376 }
 377
 378 TEST_F(RendererImplTest, SetPlaybackRate) {
 379   InitializeWithAudioAndVideo();
 380   SetPlaybackRate(1.0);
 381   SetPlaybackRate(2.0);
 382 }
 383
 384 TEST_F(RendererImplTest, SetVolume) {
 385   InitializeWithAudioAndVideo();
 386   EXPECT_CALL(*audio_renderer_, SetVolume(2.0f));
 387   renderer_impl_->SetVolume(2.0f);
 388 }
 389
 390 TEST_F(RendererImplTest, AudioStreamEnded) {
 391   InitializeWithAudio();
 392   Play();
 393
 394   EXPECT_CALL(time_source_, StopTicking());
 395   EXPECT_CALL(callbacks_, OnEnded());
 396
 397   audio_ended_cb_.Run();
 398   base::RunLoop().RunUntilIdle();
 399 }
 400
 401 TEST_F(RendererImplTest, VideoStreamEnded) {
 402   InitializeWithVideo();
 403   Play();
 404
 405   EXPECT_CALL(time_source_, StopTicking());
 406   EXPECT_CALL(callbacks_, OnEnded());
 407
 408   video_ended_cb_.Run();
 409   base::RunLoop().RunUntilIdle();
 410 }
 411
 412 TEST_F(RendererImplTest, AudioVideoStreamsEnded) {
 413   InitializeWithAudioAndVideo();
 414   Play();
 415
 416   // OnEnded() is called only when all streams have finished.
 417   audio_ended_cb_.Run();
 418   base::RunLoop().RunUntilIdle();
 419
 420   EXPECT_CALL(time_source_, StopTicking());
 421   EXPECT_CALL(callbacks_, OnEnded());
 422
 423   video_ended_cb_.Run();
 424   base::RunLoop().RunUntilIdle();
 425 }
 426
 427 TEST_F(RendererImplTest, ErrorAfterInitialize) {
 428   InitializeWithAudio();
 429   EXPECT_CALL(callbacks_, OnError(PIPELINE_ERROR_DECODE));
 430   audio_error_cb_.Run(PIPELINE_ERROR_DECODE);
 431   base::RunLoop().RunUntilIdle();
 432 }
 433
 434 TEST_F(RendererImplTest, ErrorDuringPlaying) {
 435   InitializeWithAudio();
 436   Play();
 437
 438   EXPECT_CALL(callbacks_, OnError(PIPELINE_ERROR_DECODE));
 439   audio_error_cb_.Run(PIPELINE_ERROR_DECODE);
 440   base::RunLoop().RunUntilIdle();
 441 }
 442
 443 TEST_F(RendererImplTest, ErrorDuringFlush) {
 444   InitializeWithAudio();
 445   Play();
 446
 447   InSequence s;
 448   EXPECT_CALL(time_source_, StopTicking());
 449   EXPECT_CALL(*audio_renderer_, Flush(_)).WillOnce(DoAll(
 450       AudioError(&audio_error_cb_, PIPELINE_ERROR_DECODE),
 451       RunClosure<0>()));
 452   EXPECT_CALL(callbacks_, OnError(PIPELINE_ERROR_DECODE));
 453   EXPECT_CALL(callbacks_, OnFlushed());
 454   renderer_impl_->Flush(
 455       base::Bind(&CallbackHelper::OnFlushed, base::Unretained(&callbacks_)));
 456   base::RunLoop().RunUntilIdle();
 457 }
 458
 459 TEST_F(RendererImplTest, ErrorAfterFlush) {
 460   InitializeWithAudio();
 461   Play();
 462   Flush(false);
 463
 464   EXPECT_CALL(callbacks_, OnError(PIPELINE_ERROR_DECODE));
 465   audio_error_cb_.Run(PIPELINE_ERROR_DECODE);
 466   base::RunLoop().RunUntilIdle();
 467 }
 468
 469 TEST_F(RendererImplTest, ErrorDuringInitialize) {
 470   CreateAudioAndVideoStream();
 471   SetAudioRendererInitializeExpectations(PIPELINE_OK);
 472
 473   // Force an audio error to occur during video renderer initialization.
 474   EXPECT_CALL(*video_renderer_,
 475               Initialize(video_stream_.get(), _, _, _, _, _, _, _, _))
 476       .WillOnce(DoAll(AudioError(&audio_error_cb_, PIPELINE_ERROR_DECODE),
 477                       SaveArg<4>(&video_buffering_state_cb_),
 478                       SaveArg<5>(&video_ended_cb_),
 479                       RunCallback<1>(PIPELINE_OK)));
 480
 481   InitializeAndExpect(PIPELINE_ERROR_DECODE);
 482 }
 483
 484 TEST_F(RendererImplTest, AudioUnderflow) {
 485   InitializeWithAudio();
 486   Play();
 487
 488   // Underflow should occur immediately with a single audio track.
 489   EXPECT_CALL(time_source_, StopTicking());
 490   audio_buffering_state_cb_.Run(BUFFERING_HAVE_NOTHING);
 491 }
 492
 493 TEST_F(RendererImplTest, AudioUnderflowWithVideo) {
 494   InitializeWithAudioAndVideo();
 495   Play();
 496
 497   // Underflow should be immediate when both audio and video are present and
 498   // audio underflows.
 499   EXPECT_CALL(time_source_, StopTicking());
 500   audio_buffering_state_cb_.Run(BUFFERING_HAVE_NOTHING);
 501 }
 502
 503 TEST_F(RendererImplTest, VideoUnderflow) {
 504   InitializeWithVideo();
 505   Play();
 506
 507   // Underflow should occur immediately with a single video track.
 508   EXPECT_CALL(time_source_, StopTicking());
 509   video_buffering_state_cb_.Run(BUFFERING_HAVE_NOTHING);
 510 }
 511
 512 TEST_F(RendererImplTest, VideoUnderflowWithAudio) {
 513   InitializeWithAudioAndVideo();
 514   Play();
 515
 516   // Set a zero threshold such that the underflow will be executed on the next
 517   // run of the message loop.
 518   renderer_impl_->set_video_underflow_threshold_for_testing(base::TimeDelta());
 519
 520   // Underflow should be delayed when both audio and video are present and video
 521   // underflows.
 522   video_buffering_state_cb_.Run(BUFFERING_HAVE_NOTHING);
 523   Mock::VerifyAndClearExpectations(&time_source_);
 524
 525   EXPECT_CALL(time_source_, StopTicking());
 526   base::RunLoop().RunUntilIdle();
 527 }
 528
 529 TEST_F(RendererImplTest, VideoUnderflowWithAudioVideoRecovers) {
 530   InitializeWithAudioAndVideo();
 531   Play();
 532
 533   // Set a zero threshold such that the underflow will be executed on the next
 534   // run of the message loop.
 535   renderer_impl_->set_video_underflow_threshold_for_testing(base::TimeDelta());
 536
 537   // Underflow should be delayed when both audio and video are present and video
 538   // underflows.
 539   video_buffering_state_cb_.Run(BUFFERING_HAVE_NOTHING);
 540   Mock::VerifyAndClearExpectations(&time_source_);
 541
 542   // If video recovers, the underflow should never occur.
 543   video_buffering_state_cb_.Run(BUFFERING_HAVE_ENOUGH);
 544   base::RunLoop().RunUntilIdle();
 545 }
 546
 547 TEST_F(RendererImplTest, VideoAndAudioUnderflow) {
 548   InitializeWithAudioAndVideo();
 549   Play();
 550
 551   // Set a zero threshold such that the underflow will be executed on the next
 552   // run of the message loop.
 553   renderer_impl_->set_video_underflow_threshold_for_testing(base::TimeDelta());
 554
 555   // Underflow should be delayed when both audio and video are present and video
 556   // underflows.
 557   video_buffering_state_cb_.Run(BUFFERING_HAVE_NOTHING);
 558   Mock::VerifyAndClearExpectations(&time_source_);
 559
 560   EXPECT_CALL(time_source_, StopTicking());
 561   audio_buffering_state_cb_.Run(BUFFERING_HAVE_NOTHING);
 562
 563   // Nothing else should primed on the message loop.
 564   base::RunLoop().RunUntilIdle();
 565 }
 566
 567 TEST_F(RendererImplTest, VideoUnderflowWithAudioFlush) {
 568   InitializeWithAudioAndVideo();
 569   Play();
 570
 571   // Set a massive threshold such that it shouldn't fire within this test.
 572   renderer_impl_->set_video_underflow_threshold_for_testing(
 573       base::TimeDelta::FromSeconds(100));
 574
 575   // Simulate the cases where audio underflows and then video underflows.
 576   EXPECT_CALL(time_source_, StopTicking());
 577   audio_buffering_state_cb_.Run(BUFFERING_HAVE_NOTHING);
 578   video_buffering_state_cb_.Run(BUFFERING_HAVE_NOTHING);
 579   Mock::VerifyAndClearExpectations(&time_source_);
 580
 581   // Flush the audio and video renderers, both think they're in an underflow
 582   // state, but if the video renderer underflow was deferred, RendererImpl would
 583   // think it still has enough data.
 584   EXPECT_CALL(*audio_renderer_, Flush(_)).WillOnce(RunClosure<0>());
 585   EXPECT_CALL(*video_renderer_, Flush(_)).WillOnce(RunClosure<0>());
 586   EXPECT_CALL(callbacks_, OnFlushed());
 587   renderer_impl_->Flush(
 588       base::Bind(&CallbackHelper::OnFlushed, base::Unretained(&callbacks_)));
 589   base::RunLoop().RunUntilIdle();
 590
 591   // Start playback after the flush, but never return BUFFERING_HAVE_ENOUGH from
 592   // the video renderer (which simulates spool up time for the video renderer).
 593   const base::TimeDelta kStartTime;
 594   EXPECT_CALL(time_source_, SetMediaTime(kStartTime));
 595   EXPECT_CALL(*audio_renderer_, StartPlaying())
 596       .WillOnce(
 597           SetBufferingState(&audio_buffering_state_cb_, BUFFERING_HAVE_ENOUGH));
 598   EXPECT_CALL(*video_renderer_, StartPlayingFrom(kStartTime));
 599   renderer_impl_->StartPlayingFrom(kStartTime);
 600
 601   // Nothing else should primed on the message loop.
 602   base::RunLoop().RunUntilIdle();
 603 }
 604
 605 }  // namespace media