Stop assuming metadata contains at least one stream

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 715 matching lines @@
   client_.set_is_autoplaying_muted(true);
 
   EXPECT_CALL(delegate_, DidPlay(_, true, false, _));
   SetDelegateState(WebMediaPlayerImpl::DelegateState::PLAYING);
 
   client_.set_is_autoplaying_muted(false);
   EXPECT_CALL(delegate_, DidPlay(_, true, true, _));
   wmpi_->SetVolume(1.0);
 }
 
+TEST_F(WebMediaPlayerImplTest, NoStreams) {
+  InitializeWebMediaPlayerImpl(true);
+  PipelineMetadata metadata;
+
+  // Nothing should happen.  In particular, no assertions should fail.
+  OnMetadata(metadata);
+}
+
 TEST_F(WebMediaPlayerImplTest, NaturalSizeChange) {
   InitializeWebMediaPlayerImpl(true);
   PipelineMetadata metadata;
   metadata.has_video = true;
   metadata.natural_size = gfx::Size(320, 240);
 
   OnMetadata(metadata);
   ASSERT_EQ(blink::WebSize(320, 240), wmpi_->NaturalSize());
 
   // TODO(sandersd): Verify that the client is notified of the size change?
@@ skipping 248 matching lines @@
                         WebMediaPlayerImplBackgroundBehaviorTest,
                         ::testing::Combine(::testing::Bool(),
                                            ::testing::Bool(),
                                            ::testing::Values(5, 300),
                                            ::testing::Values(5, 100),
                                            ::testing::Bool(),
                                            ::testing::Bool(),
                                            ::testing::Bool()));
 
 }  // namespace media