1 files changed, 72 insertions, 0 deletions
diff --git a/third_party/libwebrtc/api/metronome/test/fake_metronome.cc b/third_party/libwebrtc/api/metronome/test/fake_metronome.cc
new file mode 100644
index 0000000000..025f7ce5a6
--- /dev/null
+++ b/third_party/libwebrtc/api/metronome/test/fake_metronome.cc
@@ -0,0 +1,72 @@
+/*
+ *  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 "api/metronome/test/fake_metronome.h"
+
+#include <utility>
+#include <vector>
+
+#include "api/priority.h"
+#include "api/sequence_checker.h"
+#include "api/task_queue/task_queue_base.h"
+#include "api/task_queue/task_queue_factory.h"
+#include "api/units/time_delta.h"
+#include "rtc_base/event.h"
+#include "rtc_base/task_utils/repeating_task.h"
+
+namespace webrtc::test {
+
+ForcedTickMetronome::ForcedTickMetronome(TimeDelta tick_period)
+    : tick_period_(tick_period) {}
+
+void ForcedTickMetronome::RequestCallOnNextTick(
+    absl::AnyInvocable<void() &&> callback) {
+  callbacks_.push_back(std::move(callback));
+}
+
+TimeDelta ForcedTickMetronome::TickPeriod() const {
+  return tick_period_;
+}
+
+size_t ForcedTickMetronome::NumListeners() {
+  return callbacks_.size();
+}
+
+void ForcedTickMetronome::Tick() {
+  std::vector<absl::AnyInvocable<void() &&>> callbacks;
+  callbacks_.swap(callbacks);
+  for (auto& callback : callbacks)
+    std::move(callback)();
+}
+
+FakeMetronome::FakeMetronome(TimeDelta tick_period)
+    : tick_period_(tick_period) {}
+
+void FakeMetronome::RequestCallOnNextTick(
+    absl::AnyInvocable<void() &&> callback) {
+  TaskQueueBase* current = TaskQueueBase::Current();
+  callbacks_.push_back(std::move(callback));
+  if (callbacks_.size() == 1) {
+    current->PostDelayedTask(
+        [this] {
+          std::vector<absl::AnyInvocable<void() &&>> callbacks;
+          callbacks_.swap(callbacks);
+          for (auto& callback : callbacks)
+            std::move(callback)();
+        },
+        tick_period_);
+  }
+}
+
+TimeDelta FakeMetronome::TickPeriod() const {
+  return tick_period_;
+}
+
+}  // namespace webrtc::test