Transition media element to HAVE_CURRENT_DATA upon underflow.

media/blink/webmediaplayer_impl_unittest.cc

 // Copyright 2016 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 "media/blink/webmediaplayer_impl.h"
 
 #include <stdint.h>
 
 #include <memory>
 
@@ skipping 293 matching lines @@
   EXPECT_EQ(WebMediaPlayerImpl::DelegateState::GONE, state.delegate_state);
   EXPECT_FALSE(state.is_memory_reporting_enabled);
   EXPECT_TRUE(state.is_suspended);
 
   state = ComputeMustSuspendPlayState();
   EXPECT_EQ(WebMediaPlayerImpl::DelegateState::GONE, state.delegate_state);
   EXPECT_FALSE(state.is_memory_reporting_enabled);
   EXPECT_TRUE(state.is_suspended);
 }
 
+TEST_F(WebMediaPlayerImplTest, ComputePlayState_PlayingThenUnderflow) {
+  WebMediaPlayerImpl::PlayState state;
+  SetMetadata(true, true);
+  SetReadyState(blink::WebMediaPlayer::ReadyStateHaveFutureData);
+  SetPaused(false);
+  SetReadyState(blink::WebMediaPlayer::ReadyStateHaveCurrentData);
+
+  // Underflow should not trigger idle suspend. The user is still playing the
+  // the video, just waiting on the network.
+  state = ComputePlayState();
+  EXPECT_EQ(WebMediaPlayerImpl::DelegateState::PLAYING, state.delegate_state);
+  EXPECT_TRUE(state.is_memory_reporting_enabled);
+  EXPECT_FALSE(state.is_suspended);
+
+  // Background suspend should still be possible during underflow.
+  state = ComputeBackgroundedPlayState();
+  EXPECT_EQ(WebMediaPlayerImpl::DelegateState::GONE, state.delegate_state);
+  EXPECT_FALSE(state.is_memory_reporting_enabled);
+  EXPECT_TRUE(state.is_suspended);
+
+  // Forced suspend should still be possible during underflow.
+  state = ComputeMustSuspendPlayState();
+  EXPECT_EQ(WebMediaPlayerImpl::DelegateState::GONE, state.delegate_state);
+  EXPECT_FALSE(state.is_memory_reporting_enabled);
+  EXPECT_TRUE(state.is_suspended);
+}
+
 TEST_F(WebMediaPlayerImplTest, ComputePlayState_Playing_AudioOnly) {
   WebMediaPlayerImpl::PlayState state;
   SetMetadata(true, false);
   SetReadyState(blink::WebMediaPlayer::ReadyStateHaveFutureData);
   SetPaused(false);
 
   state = ComputePlayState();
   EXPECT_EQ(WebMediaPlayerImpl::DelegateState::PLAYING, state.delegate_state);
   EXPECT_TRUE(state.is_memory_reporting_enabled);
   EXPECT_FALSE(state.is_suspended);
@@ skipping 108 matching lines @@
   EXPECT_FALSE(state.is_suspended);
 
   SetPaused(false);
   state = ComputePlayStateSuspended();
   EXPECT_EQ(WebMediaPlayerImpl::DelegateState::PLAYING, state.delegate_state);
   EXPECT_TRUE(state.is_memory_reporting_enabled);
   EXPECT_FALSE(state.is_suspended);
 }
 
 }  // namespace media