1 files changed, 103 insertions, 0 deletions
diff --git a/third_party/libwebrtc/pc/video_track_unittest.cc b/third_party/libwebrtc/pc/video_track_unittest.cc
new file mode 100644
index 0000000000..e75fd034b3
--- /dev/null
+++ b/third_party/libwebrtc/pc/video_track_unittest.cc
@@ -0,0 +1,103 @@
+/*
+ *  Copyright 2012 The WebRTC project authors. All Rights Reserved.
+ *
+ *  Use of this source code is governed by a BSD-style license
+ *  that can be found in the LICENSE file in the root of the source
+ *  tree. An additional intellectual property rights grant can be found
+ *  in the file PATENTS.  All contributing project authors may
+ *  be found in the AUTHORS file in the root of the source tree.
+ */
+
+#include "pc/video_track.h"
+
+#include <memory>
+
+#include "media/base/fake_frame_source.h"
+#include "pc/test/fake_video_track_renderer.h"
+#include "pc/test/fake_video_track_source.h"
+#include "pc/video_track_source.h"
+#include "rtc_base/time_utils.h"
+#include "test/gtest.h"
+
+using webrtc::FakeVideoTrackRenderer;
+using webrtc::FakeVideoTrackSource;
+using webrtc::MediaSourceInterface;
+using webrtc::MediaStreamTrackInterface;
+using webrtc::VideoTrack;
+using webrtc::VideoTrackInterface;
+using webrtc::VideoTrackSource;
+
+class VideoTrackTest : public ::testing::Test {
+ public:
+  VideoTrackTest() : frame_source_(640, 480, rtc::kNumMicrosecsPerSec / 30) {
+    static const char kVideoTrackId[] = "track_id";
+    video_track_source_ = rtc::make_ref_counted<FakeVideoTrackSource>(
+        /*is_screencast=*/false);
+    video_track_ = VideoTrack::Create(kVideoTrackId, video_track_source_,
+                                      rtc::Thread::Current());
+  }
+
+ protected:
+  rtc::AutoThread main_thread_;
+  rtc::scoped_refptr<FakeVideoTrackSource> video_track_source_;
+  rtc::scoped_refptr<VideoTrack> video_track_;
+  cricket::FakeFrameSource frame_source_;
+};
+
+// VideoTrack::Create will create an API proxy around the source object.
+// The `GetSource` method provides access to the proxy object intented for API
+// use while the GetSourceInternal() provides direct access to the source object
+// as provided to the `VideoTrack::Create` factory function.
+TEST_F(VideoTrackTest, CheckApiProxyAndInternalSource) {
+  EXPECT_NE(video_track_->GetSource(), video_track_source_.get());
+  EXPECT_EQ(video_track_->GetSourceInternal(), video_track_source_.get());
+}
+
+// Test changing the source state also changes the track state.
+TEST_F(VideoTrackTest, SourceStateChangeTrackState) {
+  EXPECT_EQ(MediaStreamTrackInterface::kLive, video_track_->state());
+  video_track_source_->SetState(MediaSourceInterface::kEnded);
+  EXPECT_EQ(MediaStreamTrackInterface::kEnded, video_track_->state());
+}
+
+// Test adding renderers to a video track and render to them by providing
+// frames to the source.
+TEST_F(VideoTrackTest, RenderVideo) {
+  // FakeVideoTrackRenderer register itself to `video_track_`
+  std::unique_ptr<FakeVideoTrackRenderer> renderer_1(
+      new FakeVideoTrackRenderer(video_track_.get()));
+
+  video_track_source_->InjectFrame(frame_source_.GetFrame());
+  EXPECT_EQ(1, renderer_1->num_rendered_frames());
+
+  // FakeVideoTrackRenderer register itself to `video_track_`
+  std::unique_ptr<FakeVideoTrackRenderer> renderer_2(
+      new FakeVideoTrackRenderer(video_track_.get()));
+  video_track_source_->InjectFrame(frame_source_.GetFrame());
+  EXPECT_EQ(2, renderer_1->num_rendered_frames());
+  EXPECT_EQ(1, renderer_2->num_rendered_frames());
+
+  renderer_1.reset(nullptr);
+  video_track_source_->InjectFrame(frame_source_.GetFrame());
+  EXPECT_EQ(2, renderer_2->num_rendered_frames());
+}
+
+// Test that disabling the track results in blacked out frames.
+TEST_F(VideoTrackTest, DisableTrackBlackout) {
+  std::unique_ptr<FakeVideoTrackRenderer> renderer(
+      new FakeVideoTrackRenderer(video_track_.get()));
+
+  video_track_source_->InjectFrame(frame_source_.GetFrame());
+  EXPECT_EQ(1, renderer->num_rendered_frames());
+  EXPECT_FALSE(renderer->black_frame());
+
+  video_track_->set_enabled(false);
+  video_track_source_->InjectFrame(frame_source_.GetFrame());
+  EXPECT_EQ(2, renderer->num_rendered_frames());
+  EXPECT_TRUE(renderer->black_frame());
+
+  video_track_->set_enabled(true);
+  video_track_source_->InjectFrame(frame_source_.GetFrame());
+  EXPECT_EQ(3, renderer->num_rendered_frames());
+  EXPECT_FALSE(renderer->black_frame());
+}