1 files changed, 94 insertions, 0 deletions
diff --git a/third_party/libwebrtc/video/video_receive_stream_timeout_tracker_unittest.cc b/third_party/libwebrtc/video/video_receive_stream_timeout_tracker_unittest.cc
new file mode 100644
index 0000000000..ea3bf896b8
--- /dev/null
+++ b/third_party/libwebrtc/video/video_receive_stream_timeout_tracker_unittest.cc
@@ -0,0 +1,94 @@
+/*
+ *  Copyright (c) 2022 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 "video/video_receive_stream_timeout_tracker.h"
+
+#include <utility>
+#include <vector>
+
+#include "api/task_queue/task_queue_base.h"
+#include "test/gmock.h"
+#include "test/gtest.h"
+#include "test/time_controller/simulated_time_controller.h"
+
+namespace webrtc {
+
+namespace {
+
+constexpr auto kMaxWaitForKeyframe = TimeDelta::Millis(500);
+constexpr auto kMaxWaitForFrame = TimeDelta::Millis(1500);
+constexpr VideoReceiveStreamTimeoutTracker::Timeouts config = {
+    kMaxWaitForKeyframe, kMaxWaitForFrame};
+}  // namespace
+
+class VideoReceiveStreamTimeoutTrackerTest : public ::testing::Test {
+ public:
+  VideoReceiveStreamTimeoutTrackerTest()
+      : time_controller_(Timestamp::Millis(2000)),
+        timeout_tracker_(time_controller_.GetClock(),
+                         time_controller_.GetMainThread(),
+                         config,
+                         [this](TimeDelta delay) { OnTimeout(delay); }) {}
+
+ protected:
+  GlobalSimulatedTimeController time_controller_;
+  VideoReceiveStreamTimeoutTracker timeout_tracker_;
+  std::vector<TimeDelta> timeouts_;
+
+ private:
+  void OnTimeout(TimeDelta delay) { timeouts_.push_back(delay); }
+};
+
+TEST_F(VideoReceiveStreamTimeoutTrackerTest, TimeoutAfterInitialPeriod) {
+  timeout_tracker_.Start(true);
+  time_controller_.AdvanceTime(kMaxWaitForKeyframe);
+  EXPECT_THAT(timeouts_, testing::ElementsAre(kMaxWaitForKeyframe));
+  timeout_tracker_.Stop();
+}
+
+TEST_F(VideoReceiveStreamTimeoutTrackerTest, NoTimeoutAfterStop) {
+  timeout_tracker_.Start(true);
+  time_controller_.AdvanceTime(kMaxWaitForKeyframe / 2);
+  timeout_tracker_.Stop();
+  time_controller_.AdvanceTime(kMaxWaitForKeyframe);
+  EXPECT_THAT(timeouts_, testing::IsEmpty());
+}
+
+TEST_F(VideoReceiveStreamTimeoutTrackerTest, TimeoutForDeltaFrame) {
+  timeout_tracker_.Start(true);
+  time_controller_.AdvanceTime(TimeDelta::Millis(5));
+  timeout_tracker_.OnEncodedFrameReleased();
+  time_controller_.AdvanceTime(kMaxWaitForFrame);
+  EXPECT_THAT(timeouts_, testing::ElementsAre(kMaxWaitForFrame));
+  timeout_tracker_.Stop();
+}
+
+TEST_F(VideoReceiveStreamTimeoutTrackerTest, TimeoutForKeyframeWhenForced) {
+  timeout_tracker_.Start(true);
+  time_controller_.AdvanceTime(TimeDelta::Millis(5));
+  timeout_tracker_.OnEncodedFrameReleased();
+  timeout_tracker_.SetWaitingForKeyframe();
+  time_controller_.AdvanceTime(kMaxWaitForKeyframe);
+  EXPECT_THAT(timeouts_, testing::ElementsAre(kMaxWaitForKeyframe));
+  timeout_tracker_.Stop();
+}
+
+TEST_F(VideoReceiveStreamTimeoutTrackerTest, TotalTimeoutUsedInCallback) {
+  timeout_tracker_.Start(true);
+  time_controller_.AdvanceTime(kMaxWaitForKeyframe * 2);
+  timeout_tracker_.OnEncodedFrameReleased();
+  time_controller_.AdvanceTime(kMaxWaitForFrame * 2);
+  EXPECT_THAT(timeouts_,
+              testing::ElementsAre(kMaxWaitForKeyframe, kMaxWaitForKeyframe * 2,
+                                   kMaxWaitForFrame, kMaxWaitForFrame * 2));
+  timeout_tracker_.Stop();
+}
+
+}  // namespace webrtc