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      1 // Copyright 2013 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "base/basictypes.h"
      6 #include "base/bind.h"
      7 #include "base/location.h"
      8 #include "base/memory/scoped_ptr.h"
      9 #include "base/message_loop/message_loop.h"
     10 #include "base/message_loop/message_loop_proxy.h"
     11 #include "base/time/time.h"
     12 #include "testing/gtest/include/gtest/gtest.h"
     13 #include "webkit/browser/fileapi/timed_task_helper.h"
     14 
     15 namespace fileapi {
     16 
     17 namespace {
     18 
     19 class Embedder {
     20  public:
     21   Embedder()
     22       : timer_(base::MessageLoopProxy::current().get()), timer_fired_(false) {}
     23 
     24   void OnTimerFired() {
     25     timer_fired_ = true;
     26   }
     27 
     28   TimedTaskHelper* timer() { return &timer_; }
     29   bool timer_fired() const { return timer_fired_; }
     30 
     31  private:
     32   TimedTaskHelper timer_;
     33   bool timer_fired_;
     34 };
     35 
     36 }  // namespace
     37 
     38 TEST(TimedTaskHelper, FireTimerWhenAlive) {
     39   base::MessageLoop message_loop;
     40   Embedder embedder;
     41 
     42   ASSERT_FALSE(embedder.timer_fired());
     43   ASSERT_FALSE(embedder.timer()->IsRunning());
     44 
     45   embedder.timer()->Start(
     46       FROM_HERE,
     47       base::TimeDelta::FromSeconds(0),
     48       base::Bind(&Embedder::OnTimerFired, base::Unretained(&embedder)));
     49 
     50   ASSERT_TRUE(embedder.timer()->IsRunning());
     51   embedder.timer()->Reset();
     52   ASSERT_TRUE(embedder.timer()->IsRunning());
     53 
     54   base::MessageLoop::current()->RunUntilIdle();
     55 
     56   ASSERT_TRUE(embedder.timer_fired());
     57 }
     58 
     59 TEST(TimedTaskHelper, FireTimerWhenAlreadyDeleted) {
     60   base::MessageLoop message_loop;
     61 
     62   // Run message loop after embedder is already deleted to make sure callback
     63   // doesn't cause a crash for use after free.
     64   {
     65     Embedder embedder;
     66 
     67     ASSERT_FALSE(embedder.timer_fired());
     68     ASSERT_FALSE(embedder.timer()->IsRunning());
     69 
     70     embedder.timer()->Start(
     71         FROM_HERE,
     72         base::TimeDelta::FromSeconds(0),
     73         base::Bind(&Embedder::OnTimerFired, base::Unretained(&embedder)));
     74 
     75     ASSERT_TRUE(embedder.timer()->IsRunning());
     76   }
     77 
     78   // At this point the callback is still in the message queue but
     79   // embedder is gone.
     80   base::MessageLoop::current()->RunUntilIdle();
     81 }
     82 
     83 }  // namespace fileapi
     84