Add TimeController to api/test/ and add a CreateTimeController API.
Creates an abstraction for an "alarm clock" which can schedule
time-controller callbacks and exposes a time controller driven by
an external alarm.
Bug: webrtc:9719
Change-Id: I08c2aa9dba25603043bfba48f55c925716a55bae
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/158969
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Per Kjellander <perkj@webrtc.org>
Reviewed-by: Artem Titov <titovartem@webrtc.org>
Reviewed-by: Steve Anton <steveanton@webrtc.org>
Commit-Queue: Bjorn Mellem <mellem@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29879}
diff --git a/api/test/create_time_controller_unittest.cc b/api/test/create_time_controller_unittest.cc
new file mode 100644
index 0000000..e39a453
--- /dev/null
+++ b/api/test/create_time_controller_unittest.cc
@@ -0,0 +1,76 @@
+/*
+ * Copyright 2019 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/test/create_time_controller.h"
+
+#include "api/test/time_controller.h"
+#include "api/units/time_delta.h"
+#include "api/units/timestamp.h"
+#include "test/gmock.h"
+#include "test/gtest.h"
+
+namespace webrtc {
+namespace {
+
+class FakeAlarm : public ControlledAlarmClock {
+ public:
+ explicit FakeAlarm(Timestamp start_time);
+
+ Clock* GetClock() override;
+ bool ScheduleAlarmAt(Timestamp deadline) override;
+ void SetCallback(std::function<void()> callback) override;
+ void Sleep(TimeDelta duration) override;
+
+ private:
+ SimulatedClock clock_;
+ Timestamp deadline_;
+ std::function<void()> callback_;
+};
+
+FakeAlarm::FakeAlarm(Timestamp start_time)
+ : clock_(start_time),
+ deadline_(Timestamp::PlusInfinity()),
+ callback_([] {}) {}
+
+Clock* FakeAlarm::GetClock() {
+ return &clock_;
+}
+
+bool FakeAlarm::ScheduleAlarmAt(Timestamp deadline) {
+ if (deadline < deadline_) {
+ deadline_ = deadline;
+ return true;
+ }
+ return false;
+}
+
+void FakeAlarm::SetCallback(std::function<void()> callback) {
+ callback_ = callback;
+}
+
+void FakeAlarm::Sleep(TimeDelta duration) {
+ Timestamp end_time = clock_.CurrentTime() + duration;
+
+ while (deadline_ <= end_time) {
+ clock_.AdvanceTime(deadline_ - clock_.CurrentTime());
+ deadline_ = Timestamp::PlusInfinity();
+ callback_();
+ }
+
+ clock_.AdvanceTime(end_time - clock_.CurrentTime());
+}
+
+TEST(CreateTimeControllerTest, CreatesNonNullController) {
+ FakeAlarm alarm(Timestamp::ms(100));
+ EXPECT_NE(CreateTimeController(&alarm), nullptr);
+}
+
+} // namespace
+} // namespace webrtc