Home | History | Annotate | Download | only in win 
      1 // Copyright (c) 2011 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/win/object_watcher.h"
      6 
      7 #include <process.h>
      8 
      9 #include "base/message_loop/message_loop.h"
     10 #include "base/run_loop.h"
     11 #include "testing/gtest/include/gtest/gtest.h"
     12 
     13 namespace base {
     14 namespace win {
     15 
     16 namespace {
     17 
     18 class QuitDelegate : public ObjectWatcher::Delegate {
     19  public:
     20   virtual void OnObjectSignaled(HANDLE object) {
     21     MessageLoop::current()->QuitWhenIdle();
     22   }
     23 };
     24 
     25 class DecrementCountDelegate : public ObjectWatcher::Delegate {
     26  public:
     27   explicit DecrementCountDelegate(int* counter) : counter_(counter) {
     28   }
     29   virtual void OnObjectSignaled(HANDLE object) {
     30     --(*counter_);
     31   }
     32  private:
     33   int* counter_;
     34 };
     35 
     36 void RunTest_BasicSignal(MessageLoop::Type message_loop_type) {
     37   MessageLoop message_loop(message_loop_type);
     38 
     39   ObjectWatcher watcher;
     40   EXPECT_EQ(NULL, watcher.GetWatchedObject());
     41 
     42   // A manual-reset event that is not yet signaled.
     43   HANDLE event = CreateEvent(NULL, TRUE, FALSE, NULL);
     44 
     45   QuitDelegate delegate;
     46   bool ok = watcher.StartWatching(event, &delegate);
     47   EXPECT_TRUE(ok);
     48   EXPECT_EQ(event, watcher.GetWatchedObject());
     49 
     50   SetEvent(event);
     51 
     52   MessageLoop::current()->Run();
     53 
     54   EXPECT_EQ(NULL, watcher.GetWatchedObject());
     55   CloseHandle(event);
     56 }
     57 
     58 void RunTest_BasicCancel(MessageLoop::Type message_loop_type) {
     59   MessageLoop message_loop(message_loop_type);
     60 
     61   ObjectWatcher watcher;
     62 
     63   // A manual-reset event that is not yet signaled.
     64   HANDLE event = CreateEvent(NULL, TRUE, FALSE, NULL);
     65 
     66   QuitDelegate delegate;
     67   bool ok = watcher.StartWatching(event, &delegate);
     68   EXPECT_TRUE(ok);
     69 
     70   watcher.StopWatching();
     71 
     72   CloseHandle(event);
     73 }
     74 
     75 void RunTest_CancelAfterSet(MessageLoop::Type message_loop_type) {
     76   MessageLoop message_loop(message_loop_type);
     77 
     78   ObjectWatcher watcher;
     79 
     80   int counter = 1;
     81   DecrementCountDelegate delegate(&counter);
     82 
     83   // A manual-reset event that is not yet signaled.
     84   HANDLE event = CreateEvent(NULL, TRUE, FALSE, NULL);
     85 
     86   bool ok = watcher.StartWatching(event, &delegate);
     87   EXPECT_TRUE(ok);
     88 
     89   SetEvent(event);
     90 
     91   // Let the background thread do its business
     92   Sleep(30);
     93 
     94   watcher.StopWatching();
     95 
     96   RunLoop().RunUntilIdle();
     97 
     98   // Our delegate should not have fired.
     99   EXPECT_EQ(1, counter);
    100 
    101   CloseHandle(event);
    102 }
    103 
    104 void RunTest_SignalBeforeWatch(MessageLoop::Type message_loop_type) {
    105   MessageLoop message_loop(message_loop_type);
    106 
    107   ObjectWatcher watcher;
    108 
    109   // A manual-reset event that is signaled before we begin watching.
    110   HANDLE event = CreateEvent(NULL, TRUE, TRUE, NULL);
    111 
    112   QuitDelegate delegate;
    113   bool ok = watcher.StartWatching(event, &delegate);
    114   EXPECT_TRUE(ok);
    115 
    116   MessageLoop::current()->Run();
    117 
    118   EXPECT_EQ(NULL, watcher.GetWatchedObject());
    119   CloseHandle(event);
    120 }
    121 
    122 void RunTest_OutlivesMessageLoop(MessageLoop::Type message_loop_type) {
    123   // Simulate a MessageLoop that dies before an ObjectWatcher.  This ordinarily
    124   // doesn't happen when people use the Thread class, but it can happen when
    125   // people use the Singleton pattern or atexit.
    126   HANDLE event = CreateEvent(NULL, TRUE, FALSE, NULL);  // not signaled
    127   {
    128     ObjectWatcher watcher;
    129     {
    130       MessageLoop message_loop(message_loop_type);
    131 
    132       QuitDelegate delegate;
    133       watcher.StartWatching(event, &delegate);
    134     }
    135   }
    136   CloseHandle(event);
    137 }
    138 
    139 }  // namespace
    140 
    141 //-----------------------------------------------------------------------------
    142 
    143 TEST(ObjectWatcherTest, BasicSignal) {
    144   RunTest_BasicSignal(MessageLoop::TYPE_DEFAULT);
    145   RunTest_BasicSignal(MessageLoop::TYPE_IO);
    146   RunTest_BasicSignal(MessageLoop::TYPE_UI);
    147 }
    148 
    149 TEST(ObjectWatcherTest, BasicCancel) {
    150   RunTest_BasicCancel(MessageLoop::TYPE_DEFAULT);
    151   RunTest_BasicCancel(MessageLoop::TYPE_IO);
    152   RunTest_BasicCancel(MessageLoop::TYPE_UI);
    153 }
    154 
    155 TEST(ObjectWatcherTest, CancelAfterSet) {
    156   RunTest_CancelAfterSet(MessageLoop::TYPE_DEFAULT);
    157   RunTest_CancelAfterSet(MessageLoop::TYPE_IO);
    158   RunTest_CancelAfterSet(MessageLoop::TYPE_UI);
    159 }
    160 
    161 TEST(ObjectWatcherTest, SignalBeforeWatch) {
    162   RunTest_SignalBeforeWatch(MessageLoop::TYPE_DEFAULT);
    163   RunTest_SignalBeforeWatch(MessageLoop::TYPE_IO);
    164   RunTest_SignalBeforeWatch(MessageLoop::TYPE_UI);
    165 }
    166 
    167 TEST(ObjectWatcherTest, OutlivesMessageLoop) {
    168   RunTest_OutlivesMessageLoop(MessageLoop::TYPE_DEFAULT);
    169   RunTest_OutlivesMessageLoop(MessageLoop::TYPE_IO);
    170   RunTest_OutlivesMessageLoop(MessageLoop::TYPE_UI);
    171 }
    172 
    173 }  // namespace win
    174 }  // namespace base
    175