Split out QuicAlarm creation from QuicConnectionHelper to new QuicAlarmFactory. No behavior change,…

net/quic/quic_chromium_alarm_factory_test.cc

Index: net/quic/quic_chromium_alarm_factory_test.cc
diff --git a/net/quic/quic_chromium_alarm_factory_test.cc b/net/quic/quic_chromium_alarm_factory_test.cc
new file mode 100644
index 0000000000000000000000000000000000000000..d47c98eb34ee8d6372c7cdae3f45ade6cbb62f49
--- /dev/null
+++ b/net/quic/quic_chromium_alarm_factory_test.cc
@@ -0,0 +1,175 @@
+// Copyright (c) 2012 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 "net/quic/quic_chromium_alarm_factory.h"
+
+#include "net/quic/test_tools/mock_clock.h"
+#include "net/quic/test_tools/test_task_runner.h"
+#include "testing/gtest/include/gtest/gtest.h"
+
+namespace net {
+namespace test {
+namespace {
+
+class TestDelegate : public QuicAlarm::Delegate {
+ public:
+  TestDelegate() : fired_(false) {}
+
+  void OnAlarm() override { fired_ = true; }
+
+  bool fired() const { return fired_; }
+  void Clear() { fired_ = false; }
+
+ private:
+  bool fired_;
+};
+
+class QuicChromiumAlarmFactoryTest : public ::testing::Test {
+ protected:
+  QuicChromiumAlarmFactoryTest()
+      : runner_(new TestTaskRunner(&clock_)),
+        alarm_factory_(runner_.get(), &clock_) {}
+
+  scoped_refptr<TestTaskRunner> runner_;
+  QuicChromiumAlarmFactory alarm_factory_;
+  MockClock clock_;
+};
+
+TEST_F(QuicChromiumAlarmFactoryTest, CreateAlarm) {
+  TestDelegate* delegate = new TestDelegate();
+  std::unique_ptr<QuicAlarm> alarm(alarm_factory_.CreateAlarm(delegate));
+
+  QuicTime::Delta delta = QuicTime::Delta::FromMicroseconds(1);
+  alarm->Set(clock_.Now().Add(delta));
+
+  // Verify that the alarm task has been posted.
+  ASSERT_EQ(1u, runner_->GetPostedTasks().size());
+  EXPECT_EQ(base::TimeDelta::FromMicroseconds(delta.ToMicroseconds()),
+            runner_->GetPostedTasks()[0].delay);
+
+  runner_->RunNextTask();
+  EXPECT_EQ(QuicTime::Zero().Add(delta), clock_.Now());
+  EXPECT_TRUE(delegate->fired());
+}
+
+TEST_F(QuicChromiumAlarmFactoryTest, CreateAlarmAndCancel) {
+  TestDelegate* delegate = new TestDelegate();
+  std::unique_ptr<QuicAlarm> alarm(alarm_factory_.CreateAlarm(delegate));
+
+  QuicTime::Delta delta = QuicTime::Delta::FromMicroseconds(1);
+  alarm->Set(clock_.Now().Add(delta));
+  alarm->Cancel();
+
+  // The alarm task should still be posted.
+  ASSERT_EQ(1u, runner_->GetPostedTasks().size());
+  EXPECT_EQ(base::TimeDelta::FromMicroseconds(delta.ToMicroseconds()),
+            runner_->GetPostedTasks()[0].delay);
+
+  runner_->RunNextTask();
+  EXPECT_EQ(QuicTime::Zero().Add(delta), clock_.Now());
+  EXPECT_FALSE(delegate->fired());
+}
+
+TEST_F(QuicChromiumAlarmFactoryTest, CreateAlarmAndReset) {
+  TestDelegate* delegate = new TestDelegate();
+  std::unique_ptr<QuicAlarm> alarm(alarm_factory_.CreateAlarm(delegate));
+
+  QuicTime::Delta delta = QuicTime::Delta::FromMicroseconds(1);
+  alarm->Set(clock_.Now().Add(delta));
+  alarm->Cancel();
+  QuicTime::Delta new_delta = QuicTime::Delta::FromMicroseconds(3);
+  alarm->Set(clock_.Now().Add(new_delta));
+
+  // The alarm task should still be posted.
+  ASSERT_EQ(1u, runner_->GetPostedTasks().size());
+  EXPECT_EQ(base::TimeDelta::FromMicroseconds(delta.ToMicroseconds()),
+            runner_->GetPostedTasks()[0].delay);
+
+  runner_->RunNextTask();
+  EXPECT_EQ(QuicTime::Zero().Add(delta), clock_.Now());
+  EXPECT_FALSE(delegate->fired());
+
+  // The alarm task should be posted again.
+  ASSERT_EQ(1u, runner_->GetPostedTasks().size());
+
+  runner_->RunNextTask();
+  EXPECT_EQ(QuicTime::Zero().Add(new_delta), clock_.Now());
+  EXPECT_TRUE(delegate->fired());
+}
+
+TEST_F(QuicChromiumAlarmFactoryTest, CreateAlarmAndResetEarlier) {
+  TestDelegate* delegate = new TestDelegate();
+  std::unique_ptr<QuicAlarm> alarm(alarm_factory_.CreateAlarm(delegate));
+
+  QuicTime::Delta delta = QuicTime::Delta::FromMicroseconds(3);
+  alarm->Set(clock_.Now().Add(delta));
+  alarm->Cancel();
+  QuicTime::Delta new_delta = QuicTime::Delta::FromMicroseconds(1);
+  alarm->Set(clock_.Now().Add(new_delta));
+
+  // Both alarm tasks will be posted.
+  ASSERT_EQ(2u, runner_->GetPostedTasks().size());
+
+  // The earlier task will execute and will fire the alarm->
+  runner_->RunNextTask();
+  EXPECT_EQ(QuicTime::Zero().Add(new_delta), clock_.Now());
+  EXPECT_TRUE(delegate->fired());
+  delegate->Clear();
+
+  // The latter task is still posted.
+  ASSERT_EQ(1u, runner_->GetPostedTasks().size());
+
+  // When the latter task is executed, the weak ptr will be invalid and
+  // the alarm will not fire.
+  runner_->RunNextTask();
+  EXPECT_EQ(QuicTime::Zero().Add(delta), clock_.Now());
+  EXPECT_FALSE(delegate->fired());
+}
+
+TEST_F(QuicChromiumAlarmFactoryTest, CreateAlarmAndUpdate) {
+  TestDelegate* delegate = new TestDelegate();
+  std::unique_ptr<QuicAlarm> alarm(alarm_factory_.CreateAlarm(delegate));
+
+  QuicTime start = clock_.Now();
+  QuicTime::Delta delta = QuicTime::Delta::FromMicroseconds(1);
+  alarm->Set(clock_.Now().Add(delta));
+  QuicTime::Delta new_delta = QuicTime::Delta::FromMicroseconds(3);
+  alarm->Update(clock_.Now().Add(new_delta),
+                QuicTime::Delta::FromMicroseconds(1));
+
+  // The alarm task should still be posted.
+  ASSERT_EQ(1u, runner_->GetPostedTasks().size());
+  EXPECT_EQ(base::TimeDelta::FromMicroseconds(delta.ToMicroseconds()),
+            runner_->GetPostedTasks()[0].delay);
+
+  runner_->RunNextTask();
+  EXPECT_EQ(QuicTime::Zero().Add(delta), clock_.Now());
+  EXPECT_FALSE(delegate->fired());
+
+  // Move the alarm forward 1us and ensure it doesn't move forward.
+  alarm->Update(clock_.Now().Add(new_delta),
+                QuicTime::Delta::FromMicroseconds(2));
+
+  ASSERT_EQ(1u, runner_->GetPostedTasks().size());
+  EXPECT_EQ(base::TimeDelta::FromMicroseconds(
+                new_delta.Subtract(delta).ToMicroseconds()),
+            runner_->GetPostedTasks()[0].delay);
+  runner_->RunNextTask();
+  EXPECT_EQ(start.Add(new_delta), clock_.Now());
+  EXPECT_TRUE(delegate->fired());
+
+  // Set the alarm via an update call.
+  new_delta = QuicTime::Delta::FromMicroseconds(5);
+  alarm->Update(clock_.Now().Add(new_delta),
+                QuicTime::Delta::FromMicroseconds(1));
+  EXPECT_TRUE(alarm->IsSet());
+
+  // Update it with an uninitialized time and ensure it's cancelled.
+  alarm->Update(QuicTime::Zero(), QuicTime::Delta::FromMicroseconds(1));
+  EXPECT_FALSE(alarm->IsSet());
+}
+
+}  // namespace
+}  // namespace test
+}  // namespace net