base/message_pump_libevent_unittest.cc

   1 // Copyright (c) 2012 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/message_pump_libevent.h"
   6
   7 #include <unistd.h>
   8
   9 #include "base/eintr_wrapper.h"
  10 #include "base/message_loop.h"
  11 #include "base/threading/thread.h"
  12 #include "testing/gtest/include/gtest/gtest.h"
  13
  14 #if defined(USE_SYSTEM_LIBEVENT)
  15 #include <event.h>
  16 #else
  17 #include "third_party/libevent/event.h"
  18 #endif
  19
  20 namespace base {
  21
  22 class MessagePumpLibeventTest : public testing::Test {
  23  protected:
  24   MessagePumpLibeventTest()
  25       : ui_loop_(MessageLoop::TYPE_UI),
  26         io_thread_("MessagePumpLibeventTestIOThread") {}
  27   virtual ~MessagePumpLibeventTest() {}
  28
  29   virtual void SetUp() OVERRIDE {
  30     Thread::Options options(MessageLoop::TYPE_IO, 0);
  31     ASSERT_TRUE(io_thread_.StartWithOptions(options));
  32     ASSERT_EQ(MessageLoop::TYPE_IO, io_thread_.message_loop()->type());
  33     int err = pipe(pipefds_);
  34     ASSERT_EQ(0, err);
  35   }
  36
  37   virtual void TearDown() OVERRIDE {
  38     if (HANDLE_EINTR(close(pipefds_[0])) < 0)
  39       PLOG(ERROR) << "close";
  40     if (HANDLE_EINTR(close(pipefds_[1])) < 0)
  41       PLOG(ERROR) << "close";
  42   }
  43
  44   MessageLoop* ui_loop() { return &ui_loop_; }
  45   MessageLoopForIO* io_loop() const {
  46     return static_cast<MessageLoopForIO*>(io_thread_.message_loop());
  47   }
  48
  49   void OnLibeventNotification(
  50       MessagePumpLibevent* pump,
  51       MessagePumpLibevent::FileDescriptorWatcher* controller) {
  52     pump->OnLibeventNotification(0, EV_WRITE | EV_READ, controller);
  53   }
  54
  55   MessageLoop ui_loop_;
  56   Thread io_thread_;
  57   int pipefds_[2];
  58 };
  59
  60 namespace {
  61
  62 // Concrete implementation of MessagePumpLibevent::Watcher that does
  63 // nothing useful.
  64 class StupidWatcher : public MessagePumpLibevent::Watcher {
  65  public:
  66   virtual ~StupidWatcher() {}
  67
  68   // base:MessagePumpLibevent::Watcher interface
  69   virtual void OnFileCanReadWithoutBlocking(int fd) OVERRIDE {}
  70   virtual void OnFileCanWriteWithoutBlocking(int fd) OVERRIDE {}
  71 };
  72
  73 #if GTEST_HAS_DEATH_TEST && !defined(NDEBUG)
  74
  75 // Test to make sure that we catch calling WatchFileDescriptor off of the
  76 // wrong thread.
  77 TEST_F(MessagePumpLibeventTest, TestWatchingFromBadThread) {
  78   MessagePumpLibevent::FileDescriptorWatcher watcher;
  79   StupidWatcher delegate;
  80
  81   ASSERT_DEATH(io_loop()->WatchFileDescriptor(
  82       STDOUT_FILENO, false, MessageLoopForIO::WATCH_READ, &watcher, &delegate),
  83       "Check failed: "
  84       "watch_file_descriptor_caller_checker_.CalledOnValidThread()");
  85 }
  86
  87 #endif  // GTEST_HAS_DEATH_TEST && !defined(NDEBUG)
  88
  89 class BaseWatcher : public MessagePumpLibevent::Watcher {
  90  public:
  91   BaseWatcher(MessagePumpLibevent::FileDescriptorWatcher* controller)
  92       : controller_(controller) {
  93     DCHECK(controller_);
  94   }
  95   virtual ~BaseWatcher() {}
  96
  97   // base:MessagePumpLibevent::Watcher interface
  98   virtual void OnFileCanReadWithoutBlocking(int /* fd */) OVERRIDE {
  99     NOTREACHED();
 100   }
 101
 102   virtual void OnFileCanWriteWithoutBlocking(int /* fd */) OVERRIDE {
 103     NOTREACHED();
 104   }
 105
 106  protected:
 107   MessagePumpLibevent::FileDescriptorWatcher* controller_;
 108 };
 109
 110 class DeleteWatcher : public BaseWatcher {
 111  public:
 112   explicit DeleteWatcher(
 113       MessagePumpLibevent::FileDescriptorWatcher* controller)
 114       : BaseWatcher(controller) {}
 115
 116   virtual ~DeleteWatcher() {
 117     DCHECK(!controller_);
 118   }
 119
 120   virtual void OnFileCanWriteWithoutBlocking(int /* fd */) OVERRIDE {
 121     DCHECK(controller_);
 122     delete controller_;
 123     controller_ = NULL;
 124   }
 125 };
 126
 127 TEST_F(MessagePumpLibeventTest, DeleteWatcher) {
 128   scoped_refptr<MessagePumpLibevent> pump(new MessagePumpLibevent);
 129   MessagePumpLibevent::FileDescriptorWatcher* watcher =
 130       new MessagePumpLibevent::FileDescriptorWatcher;
 131   DeleteWatcher delegate(watcher);
 132   pump->WatchFileDescriptor(pipefds_[1],
 133       false, MessagePumpLibevent::WATCH_READ_WRITE, watcher, &delegate);
 134
 135   // Spoof a libevent notification.
 136   OnLibeventNotification(pump, watcher);
 137 }
 138
 139 class StopWatcher : public BaseWatcher {
 140  public:
 141   explicit StopWatcher(
 142       MessagePumpLibevent::FileDescriptorWatcher* controller)
 143       : BaseWatcher(controller) {}
 144
 145   virtual ~StopWatcher() {}
 146
 147   virtual void OnFileCanWriteWithoutBlocking(int /* fd */) OVERRIDE {
 148     controller_->StopWatchingFileDescriptor();
 149   }
 150 };
 151
 152 TEST_F(MessagePumpLibeventTest, StopWatcher) {
 153   scoped_refptr<MessagePumpLibevent> pump(new MessagePumpLibevent);
 154   MessagePumpLibevent::FileDescriptorWatcher watcher;
 155   StopWatcher delegate(&watcher);
 156   pump->WatchFileDescriptor(pipefds_[1],
 157       false, MessagePumpLibevent::WATCH_READ_WRITE, &watcher, &delegate);
 158
 159   // Spoof a libevent notification.
 160   OnLibeventNotification(pump, &watcher);
 161 }
 162
 163 }  // namespace
 164
 165 }  // namespace base