Revert of C++ readability review

components/timers/alarm_timer_unittest.cc

 // Copyright 2014 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 "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/macros.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/threading/platform_thread.h"
 #include "base/time/time.h"
-#include "components/timers/alarm_timer_chromeos.h"
+#include "components/timers/alarm_timer.h"
 #include "testing/gtest/include/gtest/gtest.h"
 
 // Most of these tests have been lifted right out of timer_unittest.cc with only
 // cosmetic changes (like replacing calls to MessageLoop::current()->Run() with
 // a RunLoop).  We want the AlarmTimer to be a drop-in replacement for the
 // regular Timer so it should pass the same tests as the Timer class.
 //
 // The only new tests are the .*ConcurrentResetAndTimerFired tests, which test
 // that race conditions that can come up in the AlarmTimer::Delegate are
 // properly handled.
 namespace timers {
 namespace {
 // The message loops on which each timer should be tested.
 const base::MessageLoop::Type testing_message_loops[] = {
-    base::MessageLoop::TYPE_DEFAULT,
-    base::MessageLoop::TYPE_IO,
+  base::MessageLoop::TYPE_DEFAULT,
+  base::MessageLoop::TYPE_IO,
 #if !defined(OS_IOS)  // iOS does not allow direct running of the UI loop.
-    base::MessageLoop::TYPE_UI,
+  base::MessageLoop::TYPE_UI,
 #endif
 };
 
 const int kNumTestingMessageLoops = arraysize(testing_message_loops);
 const base::TimeDelta kTenMilliseconds = base::TimeDelta::FromMilliseconds(10);
 
 class OneShotAlarmTimerTester {
  public:
   OneShotAlarmTimerTester(bool* did_run, base::TimeDelta delay)
       : did_run_(did_run),
         delay_(delay),
-        timer_(new timers::OneShotAlarmTimer()) {}
+        timer_(new timers::AlarmTimer(false, false)) {
+  }
   void Start() {
-    timer_->Start(FROM_HERE, delay_, base::Bind(&OneShotAlarmTimerTester::Run,
-                                                base::Unretained(this)));
+    timer_->Start(FROM_HERE,
+                  delay_,
+                  base::Bind(&OneShotAlarmTimerTester::Run,
+                             base::Unretained(this)));
   }
 
  private:
   void Run() {
     *did_run_ = true;
 
     base::MessageLoop::current()->PostTask(
         FROM_HERE, base::MessageLoop::QuitWhenIdleClosure());
   }
 
   bool* did_run_;
   const base::TimeDelta delay_;
-  scoped_ptr<timers::OneShotAlarmTimer> timer_;
+  scoped_ptr<timers::AlarmTimer> timer_;
 
   DISALLOW_COPY_AND_ASSIGN(OneShotAlarmTimerTester);
 };
 
 class OneShotSelfDeletingAlarmTimerTester {
  public:
   OneShotSelfDeletingAlarmTimerTester(bool* did_run, base::TimeDelta delay)
       : did_run_(did_run),
         delay_(delay),
-        timer_(new timers::OneShotAlarmTimer()) {}
+        timer_(new timers::AlarmTimer(false, false)) {
+  }
   void Start() {
-    timer_->Start(FROM_HERE, delay_,
+    timer_->Start(FROM_HERE,
+                  delay_,
                   base::Bind(&OneShotSelfDeletingAlarmTimerTester::Run,
                              base::Unretained(this)));
   }
 
  private:
   void Run() {
     *did_run_ = true;
     timer_.reset();
 
     base::MessageLoop::current()->PostTask(
         FROM_HERE, base::MessageLoop::QuitWhenIdleClosure());
   }
 
   bool* did_run_;
   const base::TimeDelta delay_;
-  scoped_ptr<timers::OneShotAlarmTimer> timer_;
+  scoped_ptr<timers::AlarmTimer> timer_;
 
   DISALLOW_COPY_AND_ASSIGN(OneShotSelfDeletingAlarmTimerTester);
 };
 
 class RepeatingAlarmTimerTester {
  public:
   RepeatingAlarmTimerTester(bool* did_run, base::TimeDelta delay)
       : did_run_(did_run),
         delay_(delay),
         counter_(10),
-        timer_(new timers::RepeatingAlarmTimer()) {}
+        timer_(new timers::AlarmTimer(true, true)) {
+  }
   void Start() {
-    timer_->Start(FROM_HERE, delay_, base::Bind(&RepeatingAlarmTimerTester::Run,
-                                                base::Unretained(this)));
+    timer_->Start(FROM_HERE,
+                  delay_,
+                  base::Bind(&RepeatingAlarmTimerTester::Run,
+                             base::Unretained(this)));
   }
 
  private:
   void Run() {
     if (--counter_ == 0) {
       *did_run_ = true;
       timer_->Stop();
 
       base::MessageLoop::current()->PostTask(
           FROM_HERE, base::MessageLoop::QuitWhenIdleClosure());
     }
   }
 
   bool* did_run_;
   const base::TimeDelta delay_;
   int counter_;
-  scoped_ptr<timers::RepeatingAlarmTimer> timer_;
+  scoped_ptr<timers::AlarmTimer> timer_;
 
   DISALLOW_COPY_AND_ASSIGN(RepeatingAlarmTimerTester);
 };
 
+void RunTest_OneShotAlarmTimer(base::MessageLoop::Type message_loop_type) {
+  base::MessageLoop loop(message_loop_type);
+
+  bool did_run = false;
+  OneShotAlarmTimerTester f(&did_run, kTenMilliseconds);
+  f.Start();
+
+  base::RunLoop().Run();
+
+  EXPECT_TRUE(did_run);
+}
+
+void RunTest_OneShotAlarmTimer_Cancel(
+    base::MessageLoop::Type message_loop_type) {
+  base::MessageLoop loop(message_loop_type);
+
+  bool did_run_a = false;
+  OneShotAlarmTimerTester* a = new OneShotAlarmTimerTester(&did_run_a,
+                                                           kTenMilliseconds);
+
+  // This should run before the timer expires.
+  base::MessageLoop::current()->DeleteSoon(FROM_HERE, a);
+
+  // Now start the timer.
+  a->Start();
+
+  bool did_run_b = false;
+  OneShotAlarmTimerTester b(&did_run_b, kTenMilliseconds);
+  b.Start();
+
+  base::RunLoop().Run();
+
+  EXPECT_FALSE(did_run_a);
+  EXPECT_TRUE(did_run_b);
+}
+
+void RunTest_OneShotSelfDeletingAlarmTimer(
+    base::MessageLoop::Type message_loop_type) {
+  base::MessageLoop loop(message_loop_type);
+
+  bool did_run = false;
+  OneShotSelfDeletingAlarmTimerTester f(&did_run, kTenMilliseconds);
+  f.Start();
+
+  base::RunLoop().Run();
+
+  EXPECT_TRUE(did_run);
+}
+
+void RunTest_RepeatingAlarmTimer(base::MessageLoop::Type message_loop_type,
+                                 const base::TimeDelta& delay) {
+  base::MessageLoop loop(message_loop_type);
+
+  bool did_run = false;
+  RepeatingAlarmTimerTester f(&did_run, delay);
+  f.Start();
+
+  base::RunLoop().Run();
+
+  EXPECT_TRUE(did_run);
+}
+
+void RunTest_RepeatingAlarmTimer_Cancel(
+    base::MessageLoop::Type message_loop_type, const base::TimeDelta& delay) {
+  base::MessageLoop loop(message_loop_type);
+
+  bool did_run_a = false;
+  RepeatingAlarmTimerTester* a = new RepeatingAlarmTimerTester(&did_run_a,
+                                                               delay);
+
+  // This should run before the timer expires.
+  base::MessageLoop::current()->DeleteSoon(FROM_HERE, a);
+
+  // Now start the timer.
+  a->Start();
+
+  bool did_run_b = false;
+  RepeatingAlarmTimerTester b(&did_run_b, delay);
+  b.Start();
+
+  base::RunLoop().Run();
+
+  EXPECT_FALSE(did_run_a);
+  EXPECT_TRUE(did_run_b);
+}
+
 }  // namespace
 
 //-----------------------------------------------------------------------------
 // Each test is run against each type of MessageLoop.  That way we are sure
 // that timers work properly in all configurations.
 
 TEST(AlarmTimerTest, OneShotAlarmTimer) {
   for (int i = 0; i < kNumTestingMessageLoops; i++) {
-    base::MessageLoop loop(testing_message_loops[i]);
-
-    bool did_run = false;
-    OneShotAlarmTimerTester f(&did_run, kTenMilliseconds);
-    f.Start();
-
-    base::RunLoop().Run();
-
-    EXPECT_TRUE(did_run);
+    RunTest_OneShotAlarmTimer(testing_message_loops[i]);
   }
 }
 
 TEST(AlarmTimerTest, OneShotAlarmTimer_Cancel) {
   for (int i = 0; i < kNumTestingMessageLoops; i++) {
-    base::MessageLoop loop(testing_message_loops[i]);
-
-    bool did_run_a = false;
-    OneShotAlarmTimerTester* a =
-        new OneShotAlarmTimerTester(&did_run_a, kTenMilliseconds);
-
-    // This should run before the timer expires.
-    base::MessageLoop::current()->DeleteSoon(FROM_HERE, a);
-
-    // Now start the timer.
-    a->Start();
-
-    bool did_run_b = false;
-    OneShotAlarmTimerTester b(&did_run_b, kTenMilliseconds);
-    b.Start();
-
-    base::RunLoop().Run();
-
-    EXPECT_FALSE(did_run_a);
-    EXPECT_TRUE(did_run_b);
+    RunTest_OneShotAlarmTimer_Cancel(testing_message_loops[i]);
   }
 }
 
 // If underlying timer does not handle this properly, we will crash or fail
 // in full page heap environment.
 TEST(AlarmTimerTest, OneShotSelfDeletingAlarmTimer) {
   for (int i = 0; i < kNumTestingMessageLoops; i++) {
-    base::MessageLoop loop(testing_message_loops[i]);
-
-    bool did_run = false;
-    OneShotSelfDeletingAlarmTimerTester f(&did_run, kTenMilliseconds);
-    f.Start();
-
-    base::RunLoop().Run();
-
-    EXPECT_TRUE(did_run);
+    RunTest_OneShotSelfDeletingAlarmTimer(testing_message_loops[i]);
   }
 }
 
 TEST(AlarmTimerTest, RepeatingAlarmTimer) {
   for (int i = 0; i < kNumTestingMessageLoops; i++) {
-    base::MessageLoop loop(testing_message_loops[i]);
-
-    bool did_run = false;
-    RepeatingAlarmTimerTester f(&did_run, kTenMilliseconds);
-    f.Start();
-
-    base::RunLoop().Run();
-
-    EXPECT_TRUE(did_run);
+    RunTest_RepeatingAlarmTimer(testing_message_loops[i],
+                                kTenMilliseconds);
   }
 }
 
 TEST(AlarmTimerTest, RepeatingAlarmTimer_Cancel) {
   for (int i = 0; i < kNumTestingMessageLoops; i++) {
-    base::MessageLoop loop(testing_message_loops[i]);
-
-    bool did_run_a = false;
-    RepeatingAlarmTimerTester* a =
-        new RepeatingAlarmTimerTester(&did_run_a, kTenMilliseconds);
-
-    // This should run before the timer expires.
-    base::MessageLoop::current()->DeleteSoon(FROM_HERE, a);
-
-    // Now start the timer.
-    a->Start();
-
-    bool did_run_b = false;
-    RepeatingAlarmTimerTester b(&did_run_b, kTenMilliseconds);
-    b.Start();
-
-    base::RunLoop().Run();
-
-    EXPECT_FALSE(did_run_a);
-    EXPECT_TRUE(did_run_b);
+    RunTest_RepeatingAlarmTimer_Cancel(testing_message_loops[i],
+                                       kTenMilliseconds);
   }
 }
 
 TEST(AlarmTimerTest, RepeatingAlarmTimerZeroDelay) {
   for (int i = 0; i < kNumTestingMessageLoops; i++) {
-    base::MessageLoop loop(testing_message_loops[i]);
-
-    bool did_run = false;
-    RepeatingAlarmTimerTester f(&did_run, base::TimeDelta());
-    f.Start();
-
-    base::RunLoop().Run();
-
-    EXPECT_TRUE(did_run);
+    RunTest_RepeatingAlarmTimer(testing_message_loops[i],
+                                base::TimeDelta::FromMilliseconds(0));
   }
 }
 
 TEST(AlarmTimerTest, RepeatingAlarmTimerZeroDelay_Cancel) {
   for (int i = 0; i < kNumTestingMessageLoops; i++) {
-    base::MessageLoop loop(testing_message_loops[i]);
-
-    bool did_run_a = false;
-    RepeatingAlarmTimerTester* a =
-        new RepeatingAlarmTimerTester(&did_run_a, base::TimeDelta());
-
-    // This should run before the timer expires.
-    base::MessageLoop::current()->DeleteSoon(FROM_HERE, a);
-
-    // Now start the timer.
-    a->Start();
-
-    bool did_run_b = false;
-    RepeatingAlarmTimerTester b(&did_run_b, base::TimeDelta());
-    b.Start();
-
-    base::RunLoop().Run();
-
-    EXPECT_FALSE(did_run_a);
-    EXPECT_TRUE(did_run_b);
+    RunTest_RepeatingAlarmTimer_Cancel(testing_message_loops[i],
+                                       base::TimeDelta::FromMilliseconds(0));
   }
 }
 
 TEST(AlarmTimerTest, MessageLoopShutdown) {
   // This test is designed to verify that shutdown of the
   // message loop does not cause crashes if there were pending
   // timers not yet fired.  It may only trigger exceptions
   // if debug heap checking is enabled.
   bool did_run = false;
   {
     OneShotAlarmTimerTester a(&did_run, kTenMilliseconds);
     OneShotAlarmTimerTester b(&did_run, kTenMilliseconds);
     OneShotAlarmTimerTester c(&did_run, kTenMilliseconds);
     OneShotAlarmTimerTester d(&did_run, kTenMilliseconds);
     {
       base::MessageLoop loop;
       a.Start();
       b.Start();
     }  // MessageLoop destructs by falling out of scope.
-  }    // OneShotTimers destruct.  SHOULD NOT CRASH, of course.
+  }  // OneShotTimers destruct.  SHOULD NOT CRASH, of course.
 
   EXPECT_FALSE(did_run);
 }
 
 TEST(AlarmTimerTest, NonRepeatIsRunning) {
   {
     base::MessageLoop loop;
-    timers::OneShotAlarmTimer timer;
+    timers::AlarmTimer timer(false, false);
     EXPECT_FALSE(timer.IsRunning());
     timer.Start(FROM_HERE, base::TimeDelta::FromDays(1),
                 base::Bind(&base::DoNothing));
     EXPECT_TRUE(timer.IsRunning());
     timer.Stop();
     EXPECT_FALSE(timer.IsRunning());
     EXPECT_TRUE(timer.user_task().is_null());
   }
 
   {
-    timers::SimpleAlarmTimer timer;
+    timers::AlarmTimer timer(true, false);
     base::MessageLoop loop;
     EXPECT_FALSE(timer.IsRunning());
     timer.Start(FROM_HERE, base::TimeDelta::FromDays(1),
                 base::Bind(&base::DoNothing));
     EXPECT_TRUE(timer.IsRunning());
     timer.Stop();
     EXPECT_FALSE(timer.IsRunning());
     ASSERT_FALSE(timer.user_task().is_null());
     timer.Reset();
     EXPECT_TRUE(timer.IsRunning());
   }
 }
 
 TEST(AlarmTimerTest, NonRepeatMessageLoopDeath) {
-  timers::OneShotAlarmTimer timer;
+  timers::AlarmTimer timer(false, false);
   {
     base::MessageLoop loop;
     EXPECT_FALSE(timer.IsRunning());
     timer.Start(FROM_HERE, base::TimeDelta::FromDays(1),
                 base::Bind(&base::DoNothing));
     EXPECT_TRUE(timer.IsRunning());
   }
   EXPECT_FALSE(timer.IsRunning());
   EXPECT_TRUE(timer.user_task().is_null());
 }
 
 TEST(AlarmTimerTest, RetainRepeatIsRunning) {
   base::MessageLoop loop;
-  timers::RepeatingAlarmTimer timer(FROM_HERE, base::TimeDelta::FromDays(1),
-                                    base::Bind(&base::DoNothing));
+  timers::AlarmTimer timer(FROM_HERE, base::TimeDelta::FromDays(1),
+                          base::Bind(&base::DoNothing), true);
   EXPECT_FALSE(timer.IsRunning());
   timer.Reset();
   EXPECT_TRUE(timer.IsRunning());
   timer.Stop();
   EXPECT_FALSE(timer.IsRunning());
   timer.Reset();
   EXPECT_TRUE(timer.IsRunning());
 }
 
 TEST(AlarmTimerTest, RetainNonRepeatIsRunning) {
   base::MessageLoop loop;
-  timers::SimpleAlarmTimer timer(FROM_HERE, base::TimeDelta::FromDays(1),
-                                 base::Bind(&base::DoNothing));
+  timers::AlarmTimer timer(FROM_HERE, base::TimeDelta::FromDays(1),
+                          base::Bind(&base::DoNothing), false);
   EXPECT_FALSE(timer.IsRunning());
   timer.Reset();
   EXPECT_TRUE(timer.IsRunning());
   timer.Stop();
   EXPECT_FALSE(timer.IsRunning());
   timer.Reset();
   EXPECT_TRUE(timer.IsRunning());
 }
 
 namespace {
@@ skipping 15 matching lines @@
 void SetCallbackHappened2() {
   g_callback_happened2 = true;
   base::MessageLoop::current()->PostTask(
       FROM_HERE, base::MessageLoop::QuitWhenIdleClosure());
 }
 
 TEST(AlarmTimerTest, ContinuationStopStart) {
   {
     ClearAllCallbackHappened();
     base::MessageLoop loop;
-    timers::OneShotAlarmTimer timer;
+    timers::AlarmTimer timer(false, false);
     timer.Start(FROM_HERE, base::TimeDelta::FromMilliseconds(10),
                 base::Bind(&SetCallbackHappened1));
     timer.Stop();
     timer.Start(FROM_HERE, base::TimeDelta::FromMilliseconds(40),
                 base::Bind(&SetCallbackHappened2));
     base::RunLoop().Run();
     EXPECT_FALSE(g_callback_happened1);
     EXPECT_TRUE(g_callback_happened2);
   }
 }
 
 TEST(AlarmTimerTest, ContinuationReset) {
   {
     ClearAllCallbackHappened();
     base::MessageLoop loop;
-    timers::OneShotAlarmTimer timer;
+    timers::AlarmTimer timer(false, false);
     timer.Start(FROM_HERE, base::TimeDelta::FromMilliseconds(10),
                 base::Bind(&SetCallbackHappened1));
     timer.Reset();
     // Since Reset happened before task ran, the user_task must not be cleared:
     ASSERT_FALSE(timer.user_task().is_null());
     base::RunLoop().Run();
     EXPECT_TRUE(g_callback_happened1);
   }
 }
 
 }  // namespace
 
+
 namespace {
 void TimerRanCallback(bool* did_run) {
   *did_run = true;
 
   base::MessageLoop::current()->PostTask(
       FROM_HERE, base::MessageLoop::QuitWhenIdleClosure());
 }
 
+void RunTest_OneShotTimerConcurrentResetAndTimerFired(
+    base::MessageLoop::Type message_loop_type) {
+  base::MessageLoop loop(message_loop_type);
+
+  timers::AlarmTimer timer(false, false);
+  bool did_run = false;
+
+  timer.Start(
+      FROM_HERE, kTenMilliseconds, base::Bind(&TimerRanCallback, &did_run));
+
+  // Sleep twice as long as the timer to ensure that the timer task gets queued.
+  base::PlatformThread::Sleep(base::TimeDelta::FromMilliseconds(20));
+
+  // Now reset the timer.  This is attempting to simulate the timer firing and
+  // being reset at the same time.  The previously queued task should be
+  // removed.
+  timer.Reset();
+
+  base::RunLoop().RunUntilIdle();
+  EXPECT_FALSE(did_run);
+
+  // If the previous check failed, running the message loop again will hang the
+  // test so we only do it if the callback has not run yet.
+  if (!did_run) {
+    base::RunLoop().Run();
+    EXPECT_TRUE(did_run);
+  }
+}
+
+void RunTest_RepeatingTimerConcurrentResetAndTimerFired(
+    base::MessageLoop::Type message_loop_type) {
+  base::MessageLoop loop(message_loop_type);
+
+  timers::AlarmTimer timer(true, true);
+  bool did_run = false;
+
+  timer.Start(
+      FROM_HERE, kTenMilliseconds, base::Bind(&TimerRanCallback, &did_run));
+
+  // Sleep more that three times as long as the timer duration to ensure that
+  // multiple tasks get queued.
+  base::PlatformThread::Sleep(base::TimeDelta::FromMilliseconds(35));
+
+  // Now reset the timer.  This is attempting to simulate a very busy message
+  // loop where multiple tasks get queued but the timer gets reset before any of
+  // them have a chance to run.
+  timer.Reset();
+
+  base::RunLoop().RunUntilIdle();
+  EXPECT_FALSE(did_run);
+
+  // If the previous check failed, running the message loop again will hang the
+  // test so we only do it if the callback has not run yet.
+  if (!did_run) {
+    base::RunLoop().Run();
+    EXPECT_TRUE(did_run);
+  }
+}
+
 TEST(AlarmTimerTest, OneShotTimerConcurrentResetAndTimerFired) {
   for (int i = 0; i < kNumTestingMessageLoops; i++) {
-    base::MessageLoop loop(testing_message_loops[i]);
-
-    timers::OneShotAlarmTimer timer;
-    bool did_run = false;
-
-    base::RunLoop run_loop;
-
-    timer.SetTimerFiredCallbackForTest(run_loop.QuitClosure());
-    timer.Start(FROM_HERE, kTenMilliseconds,
-                base::Bind(&TimerRanCallback, &did_run));
-
-    // Wait until the timer has fired and a task has been queue in the
-    // MessageLoop.
-    run_loop.Run();
-
-    // Now reset the timer.  This is attempting to simulate the timer firing and
-    // being reset at the same time.  The previously queued task should be
-    // removed.
-    timer.Reset();
-
-    base::RunLoop().RunUntilIdle();
-    EXPECT_FALSE(did_run);
-
-    // If the previous check failed, running the message loop again will hang
-    // the test so we only do it if the callback has not run yet.
-    if (!did_run) {
-      base::RunLoop().Run();
-      EXPECT_TRUE(did_run);
-    }
+    RunTest_OneShotTimerConcurrentResetAndTimerFired(testing_message_loops[i]);
   }
 }
 
 TEST(AlarmTimerTest, RepeatingTimerConcurrentResetAndTimerFired) {
   for (int i = 0; i < kNumTestingMessageLoops; i++) {
-    base::MessageLoop loop(testing_message_loops[i]);
-
-    timers::RepeatingAlarmTimer timer;
-    bool did_run = false;
-
-    base::RunLoop run_loop;
-
-    timer.SetTimerFiredCallbackForTest(run_loop.QuitClosure());
-    timer.Start(FROM_HERE, kTenMilliseconds,
-                base::Bind(&TimerRanCallback, &did_run));
-
-    // Wait until the timer has fired and a task has been queue in the
-    // MessageLoop.
-    run_loop.Run();
-
-    // Now reset the timer.  This is attempting to simulate the timer firing and
-    // being reset at the same time.  The previously queued task should be
-    // removed.
-    timer.Reset();
-
-    base::RunLoop().RunUntilIdle();
-    EXPECT_FALSE(did_run);
-
-    // If the previous check failed, running the message loop again will hang
-    // the test so we only do it if the callback has not run yet.
-    if (!did_run) {
-      base::RunLoop().Run();
-      EXPECT_TRUE(did_run);
-    }
+    RunTest_RepeatingTimerConcurrentResetAndTimerFired(
+        testing_message_loops[i]);
   }
 }
 
 }  // namespace
 
 }  // namespace timers