base/message_loop/message_pump_io_ios_unittest.cc

   1 // Copyright 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_loop/message_pump_io_ios.h"
   6
   7 #include <unistd.h>
   8
   9 #include "base/message_loop/message_loop.h"
  10 #include "base/posix/eintr_wrapper.h"
  11 #include "base/threading/thread.h"
  12 #include "testing/gtest/include/gtest/gtest.h"
  13
  14 namespace base {
  15
  16 class MessagePumpIOSForIOTest : public testing::Test {
  17  protected:
  18   MessagePumpIOSForIOTest()
  19       : ui_loop_(MessageLoop::TYPE_UI),
  20         io_thread_("MessagePumpIOSForIOTestIOThread") {}
  21   ~MessagePumpIOSForIOTest() override {}
  22
  23   void SetUp() override {
  24     Thread::Options options(MessageLoop::TYPE_IO, 0);
  25     ASSERT_TRUE(io_thread_.StartWithOptions(options));
  26     ASSERT_EQ(MessageLoop::TYPE_IO, io_thread_.message_loop()->type());
  27     int ret = pipe(pipefds_);
  28     ASSERT_EQ(0, ret);
  29     ret = pipe(alternate_pipefds_);
  30     ASSERT_EQ(0, ret);
  31   }
  32
  33   void TearDown() override {
  34     if (IGNORE_EINTR(close(pipefds_[0])) < 0)
  35       PLOG(ERROR) << "close";
  36     if (IGNORE_EINTR(close(pipefds_[1])) < 0)
  37       PLOG(ERROR) << "close";
  38   }
  39
  40   MessageLoop* ui_loop() { return &ui_loop_; }
  41   MessageLoopForIO* io_loop() const {
  42     return static_cast<MessageLoopForIO*>(io_thread_.message_loop());
  43   }
  44
  45   void HandleFdIOEvent(MessageLoopForIO::FileDescriptorWatcher* watcher) {
  46     MessagePumpIOSForIO::HandleFdIOEvent(watcher->fdref_,
  47         kCFFileDescriptorReadCallBack | kCFFileDescriptorWriteCallBack,
  48         watcher);
  49   }
  50
  51   int pipefds_[2];
  52   int alternate_pipefds_[2];
  53
  54  private:
  55   MessageLoop ui_loop_;
  56   Thread io_thread_;
  57
  58   DISALLOW_COPY_AND_ASSIGN(MessagePumpIOSForIOTest);
  59 };
  60
  61 namespace {
  62
  63 // Concrete implementation of MessagePumpIOSForIO::Watcher that does
  64 // nothing useful.
  65 class StupidWatcher : public MessagePumpIOSForIO::Watcher {
  66  public:
  67   ~StupidWatcher() override {}
  68
  69   // base:MessagePumpIOSForIO::Watcher interface
  70   void OnFileCanReadWithoutBlocking(int fd) override {}
  71   void OnFileCanWriteWithoutBlocking(int fd) override {}
  72 };
  73
  74 #if GTEST_HAS_DEATH_TEST && !defined(NDEBUG)
  75
  76 // Test to make sure that we catch calling WatchFileDescriptor off of the
  77 //  wrong thread.
  78 TEST_F(MessagePumpIOSForIOTest, TestWatchingFromBadThread) {
  79   MessagePumpIOSForIO::FileDescriptorWatcher watcher;
  80   StupidWatcher delegate;
  81
  82   ASSERT_DEBUG_DEATH(io_loop()->WatchFileDescriptor(
  83       STDOUT_FILENO, false, MessageLoopForIO::WATCH_READ, &watcher, &delegate),
  84       "Check failed: "
  85       "watch_file_descriptor_caller_checker_.CalledOnValidThread\\(\\)");
  86 }
  87
  88 #endif  // GTEST_HAS_DEATH_TEST && !defined(NDEBUG)
  89
  90 class BaseWatcher : public MessagePumpIOSForIO::Watcher {
  91  public:
  92   BaseWatcher(MessagePumpIOSForIO::FileDescriptorWatcher* controller)
  93       : controller_(controller) {
  94     DCHECK(controller_);
  95   }
  96   ~BaseWatcher() override {}
  97
  98   // MessagePumpIOSForIO::Watcher interface
  99   void OnFileCanReadWithoutBlocking(int /* fd */) override { NOTREACHED(); }
 100
 101   void OnFileCanWriteWithoutBlocking(int /* fd */) override { NOTREACHED(); }
 102
 103  protected:
 104   MessagePumpIOSForIO::FileDescriptorWatcher* controller_;
 105 };
 106
 107 class DeleteWatcher : public BaseWatcher {
 108  public:
 109   explicit DeleteWatcher(
 110       MessagePumpIOSForIO::FileDescriptorWatcher* controller)
 111       : BaseWatcher(controller) {}
 112
 113   ~DeleteWatcher() override { DCHECK(!controller_); }
 114
 115   void OnFileCanWriteWithoutBlocking(int /* fd */) override {
 116     DCHECK(controller_);
 117     delete controller_;
 118     controller_ = NULL;
 119   }
 120 };
 121
 122 TEST_F(MessagePumpIOSForIOTest, DeleteWatcher) {
 123   scoped_ptr<MessagePumpIOSForIO> pump(new MessagePumpIOSForIO);
 124   MessagePumpIOSForIO::FileDescriptorWatcher* watcher =
 125       new MessagePumpIOSForIO::FileDescriptorWatcher;
 126   DeleteWatcher delegate(watcher);
 127   pump->WatchFileDescriptor(pipefds_[1],
 128       false, MessagePumpIOSForIO::WATCH_READ_WRITE, watcher, &delegate);
 129
 130   // Spoof a callback.
 131   HandleFdIOEvent(watcher);
 132 }
 133
 134 class StopWatcher : public BaseWatcher {
 135  public:
 136   StopWatcher(MessagePumpIOSForIO::FileDescriptorWatcher* controller,
 137               MessagePumpIOSForIO* pump,
 138               int fd_to_start_watching = -1)
 139       : BaseWatcher(controller),
 140         pump_(pump),
 141         fd_to_start_watching_(fd_to_start_watching) {}
 142
 143   ~StopWatcher() override {}
 144
 145   void OnFileCanWriteWithoutBlocking(int /* fd */) override {
 146     controller_->StopWatchingFileDescriptor();
 147     if (fd_to_start_watching_ >= 0) {
 148       pump_->WatchFileDescriptor(fd_to_start_watching_,
 149           false, MessagePumpIOSForIO::WATCH_READ_WRITE, controller_, this);
 150     }
 151   }
 152
 153  private:
 154   MessagePumpIOSForIO* pump_;
 155   int fd_to_start_watching_;
 156 };
 157
 158 TEST_F(MessagePumpIOSForIOTest, StopWatcher) {
 159   scoped_ptr<MessagePumpIOSForIO> pump(new MessagePumpIOSForIO);
 160   MessagePumpIOSForIO::FileDescriptorWatcher watcher;
 161   StopWatcher delegate(&watcher, pump.get());
 162   pump->WatchFileDescriptor(pipefds_[1],
 163       false, MessagePumpIOSForIO::WATCH_READ_WRITE, &watcher, &delegate);
 164
 165   // Spoof a callback.
 166   HandleFdIOEvent(&watcher);
 167 }
 168
 169 TEST_F(MessagePumpIOSForIOTest, StopWatcherAndWatchSomethingElse) {
 170   scoped_ptr<MessagePumpIOSForIO> pump(new MessagePumpIOSForIO);
 171   MessagePumpIOSForIO::FileDescriptorWatcher watcher;
 172   StopWatcher delegate(&watcher, pump.get(), alternate_pipefds_[1]);
 173   pump->WatchFileDescriptor(pipefds_[1],
 174       false, MessagePumpIOSForIO::WATCH_READ_WRITE, &watcher, &delegate);
 175
 176   // Spoof a callback.
 177   HandleFdIOEvent(&watcher);
 178 }
 179
 180 }  // namespace
 181
 182 }  // namespace base