Revert 206507 "Move message_pump to base/message_loop."

trunk/src/base/message_loop/message_pump_glib_unittest.cc

Index: trunk/src/base/message_loop/message_pump_glib_unittest.cc
===================================================================
--- trunk/src/base/message_loop/message_pump_glib_unittest.cc	(revision 206508)
+++ trunk/src/base/message_loop/message_pump_glib_unittest.cc	(working copy)
@@ -1,580 +0,0 @@
-// Copyright (c) 2012 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/message_loop/message_pump_glib.h"
-
-#include <glib.h>
-#include <math.h>
-
-#include <algorithm>
-#include <vector>
-
-#include "base/bind.h"
-#include "base/bind_helpers.h"
-#include "base/callback.h"
-#include "base/memory/ref_counted.h"
-#include "base/message_loop.h"
-#include "base/run_loop.h"
-#include "base/threading/thread.h"
-#include "testing/gtest/include/gtest/gtest.h"
-
-#if defined(TOOLKIT_GTK)
-#include <gtk/gtk.h>
-#endif
-
-namespace base {
-namespace {
-
-// This class injects dummy "events" into the GLib loop. When "handled" these
-// events can run tasks. This is intended to mock gtk events (the corresponding
-// GLib source runs at the same priority).
-class EventInjector {
- public:
-  EventInjector() : processed_events_(0) {
-    source_ = static_cast<Source*>(g_source_new(&SourceFuncs, sizeof(Source)));
-    source_->injector = this;
-    g_source_attach(source_, NULL);
-    g_source_set_can_recurse(source_, TRUE);
-  }
-
-  ~EventInjector() {
-    g_source_destroy(source_);
-    g_source_unref(source_);
-  }
-
-  int HandlePrepare() {
-    // If the queue is empty, block.
-    if (events_.empty())
-      return -1;
-    TimeDelta delta = events_[0].time - Time::NowFromSystemTime();
-    return std::max(0, static_cast<int>(ceil(delta.InMillisecondsF())));
-  }
-
-  bool HandleCheck() {
-    if (events_.empty())
-      return false;
-    return events_[0].time <= Time::NowFromSystemTime();
-  }
-
-  void HandleDispatch() {
-    if (events_.empty())
-      return;
-    Event event = events_[0];
-    events_.erase(events_.begin());
-    ++processed_events_;
-    if (!event.callback.is_null())
-      event.callback.Run();
-    else if (!event.task.is_null())
-      event.task.Run();
-  }
-
-  // Adds an event to the queue. When "handled", executes |callback|.
-  // delay_ms is relative to the last event if any, or to Now() otherwise.
-  void AddEvent(int delay_ms, const Closure& callback) {
-    AddEventHelper(delay_ms, callback, Closure());
-  }
-
-  void AddDummyEvent(int delay_ms) {
-    AddEventHelper(delay_ms, Closure(), Closure());
-  }
-
-  void AddEventAsTask(int delay_ms, const Closure& task) {
-    AddEventHelper(delay_ms, Closure(), task);
-  }
-
-  void Reset() {
-    processed_events_ = 0;
-    events_.clear();
-  }
-
-  int processed_events() const { return processed_events_; }
-
- private:
-  struct Event {
-    Time time;
-    Closure callback;
-    Closure task;
-  };
-
-  struct Source : public GSource {
-    EventInjector* injector;
-  };
-
-  void AddEventHelper(
-      int delay_ms, const Closure& callback, const Closure& task) {
-    Time last_time;
-    if (!events_.empty())
-      last_time = (events_.end()-1)->time;
-    else
-      last_time = Time::NowFromSystemTime();
-
-    Time future = last_time + TimeDelta::FromMilliseconds(delay_ms);
-    EventInjector::Event event = {future, callback, task};
-    events_.push_back(event);
-  }
-
-  static gboolean Prepare(GSource* source, gint* timeout_ms) {
-    *timeout_ms = static_cast<Source*>(source)->injector->HandlePrepare();
-    return FALSE;
-  }
-
-  static gboolean Check(GSource* source) {
-    return static_cast<Source*>(source)->injector->HandleCheck();
-  }
-
-  static gboolean Dispatch(GSource* source,
-                           GSourceFunc unused_func,
-                           gpointer unused_data) {
-    static_cast<Source*>(source)->injector->HandleDispatch();
-    return TRUE;
-  }
-
-  Source* source_;
-  std::vector<Event> events_;
-  int processed_events_;
-  static GSourceFuncs SourceFuncs;
-  DISALLOW_COPY_AND_ASSIGN(EventInjector);
-};
-
-GSourceFuncs EventInjector::SourceFuncs = {
-  EventInjector::Prepare,
-  EventInjector::Check,
-  EventInjector::Dispatch,
-  NULL
-};
-
-void IncrementInt(int *value) {
-  ++*value;
-}
-
-// Checks how many events have been processed by the injector.
-void ExpectProcessedEvents(EventInjector* injector, int count) {
-  EXPECT_EQ(injector->processed_events(), count);
-}
-
-// Posts a task on the current message loop.
-void PostMessageLoopTask(const tracked_objects::Location& from_here,
-                         const Closure& task) {
-  MessageLoop::current()->PostTask(from_here, task);
-}
-
-// Test fixture.
-class MessagePumpGLibTest : public testing::Test {
- public:
-  MessagePumpGLibTest() : loop_(NULL), injector_(NULL) { }
-
-  // Overridden from testing::Test:
-  virtual void SetUp() OVERRIDE {
-    loop_ = new MessageLoop(MessageLoop::TYPE_UI);
-    injector_ = new EventInjector();
-  }
-  virtual void TearDown() OVERRIDE {
-    delete injector_;
-    injector_ = NULL;
-    delete loop_;
-    loop_ = NULL;
-  }
-
-  MessageLoop* loop() const { return loop_; }
-  EventInjector* injector() const { return injector_; }
-
- private:
-  MessageLoop* loop_;
-  EventInjector* injector_;
-  DISALLOW_COPY_AND_ASSIGN(MessagePumpGLibTest);
-};
-
-}  // namespace
-
-TEST_F(MessagePumpGLibTest, TestQuit) {
-  // Checks that Quit works and that the basic infrastructure is working.
-
-  // Quit from a task
-  RunLoop().RunUntilIdle();
-  EXPECT_EQ(0, injector()->processed_events());
-
-  injector()->Reset();
-  // Quit from an event
-  injector()->AddEvent(0, MessageLoop::QuitWhenIdleClosure());
-  loop()->Run();
-  EXPECT_EQ(1, injector()->processed_events());
-}
-
-TEST_F(MessagePumpGLibTest, TestEventTaskInterleave) {
-  // Checks that tasks posted by events are executed before the next event if
-  // the posted task queue is empty.
-  // MessageLoop doesn't make strong guarantees that it is the case, but the
-  // current implementation ensures it and the tests below rely on it.
-  // If changes cause this test to fail, it is reasonable to change it, but
-  // TestWorkWhileWaitingForEvents and TestEventsWhileWaitingForWork have to be
-  // changed accordingly, otherwise they can become flaky.
-  injector()->AddEventAsTask(0, Bind(&DoNothing));
-  Closure check_task =
-      Bind(&ExpectProcessedEvents, Unretained(injector()), 2);
-  Closure posted_task =
-      Bind(&PostMessageLoopTask, FROM_HERE, check_task);
-  injector()->AddEventAsTask(0, posted_task);
-  injector()->AddEventAsTask(0, Bind(&DoNothing));
-  injector()->AddEvent(0, MessageLoop::QuitWhenIdleClosure());
-  loop()->Run();
-  EXPECT_EQ(4, injector()->processed_events());
-
-  injector()->Reset();
-  injector()->AddEventAsTask(0, Bind(&DoNothing));
-  check_task =
-      Bind(&ExpectProcessedEvents, Unretained(injector()), 2);
-  posted_task = Bind(&PostMessageLoopTask, FROM_HERE, check_task);
-  injector()->AddEventAsTask(0, posted_task);
-  injector()->AddEventAsTask(10, Bind(&DoNothing));
-  injector()->AddEvent(0, MessageLoop::QuitWhenIdleClosure());
-  loop()->Run();
-  EXPECT_EQ(4, injector()->processed_events());
-}
-
-TEST_F(MessagePumpGLibTest, TestWorkWhileWaitingForEvents) {
-  int task_count = 0;
-  // Tests that we process tasks while waiting for new events.
-  // The event queue is empty at first.
-  for (int i = 0; i < 10; ++i) {
-    loop()->PostTask(FROM_HERE, Bind(&IncrementInt, &task_count));
-  }
-  // After all the previous tasks have executed, enqueue an event that will
-  // quit.
-  loop()->PostTask(
-      FROM_HERE,
-      Bind(&EventInjector::AddEvent, Unretained(injector()), 0,
-                 MessageLoop::QuitWhenIdleClosure()));
-  loop()->Run();
-  ASSERT_EQ(10, task_count);
-  EXPECT_EQ(1, injector()->processed_events());
-
-  // Tests that we process delayed tasks while waiting for new events.
-  injector()->Reset();
-  task_count = 0;
-  for (int i = 0; i < 10; ++i) {
-    loop()->PostDelayedTask(
-        FROM_HERE,
-        Bind(&IncrementInt, &task_count),
-        TimeDelta::FromMilliseconds(10*i));
-  }
-  // After all the previous tasks have executed, enqueue an event that will
-  // quit.
-  // This relies on the fact that delayed tasks are executed in delay order.
-  // That is verified in message_loop_unittest.cc.
-  loop()->PostDelayedTask(
-      FROM_HERE,
-      Bind(&EventInjector::AddEvent, Unretained(injector()), 10,
-                 MessageLoop::QuitWhenIdleClosure()),
-      TimeDelta::FromMilliseconds(150));
-  loop()->Run();
-  ASSERT_EQ(10, task_count);
-  EXPECT_EQ(1, injector()->processed_events());
-}
-
-TEST_F(MessagePumpGLibTest, TestEventsWhileWaitingForWork) {
-  // Tests that we process events while waiting for work.
-  // The event queue is empty at first.
-  for (int i = 0; i < 10; ++i) {
-    injector()->AddDummyEvent(0);
-  }
-  // After all the events have been processed, post a task that will check that
-  // the events have been processed (note: the task executes after the event
-  // that posted it has been handled, so we expect 11 at that point).
-  Closure check_task =
-      Bind(&ExpectProcessedEvents, Unretained(injector()), 11);
-  Closure posted_task =
-      Bind(&PostMessageLoopTask, FROM_HERE, check_task);
-  injector()->AddEventAsTask(10, posted_task);
-
-  // And then quit (relies on the condition tested by TestEventTaskInterleave).
-  injector()->AddEvent(10, MessageLoop::QuitWhenIdleClosure());
-  loop()->Run();
-
-  EXPECT_EQ(12, injector()->processed_events());
-}
-
-namespace {
-
-// This class is a helper for the concurrent events / posted tasks test below.
-// It will quit the main loop once enough tasks and events have been processed,
-// while making sure there is always work to do and events in the queue.
-class ConcurrentHelper : public RefCounted<ConcurrentHelper>  {
- public:
-  explicit ConcurrentHelper(EventInjector* injector)
-      : injector_(injector),
-        event_count_(kStartingEventCount),
-        task_count_(kStartingTaskCount) {
-  }
-
-  void FromTask() {
-    if (task_count_ > 0) {
-      --task_count_;
-    }
-    if (task_count_ == 0 && event_count_ == 0) {
-        MessageLoop::current()->QuitWhenIdle();
-    } else {
-      MessageLoop::current()->PostTask(
-          FROM_HERE, Bind(&ConcurrentHelper::FromTask, this));
-    }
-  }
-
-  void FromEvent() {
-    if (event_count_ > 0) {
-      --event_count_;
-    }
-    if (task_count_ == 0 && event_count_ == 0) {
-        MessageLoop::current()->QuitWhenIdle();
-    } else {
-      injector_->AddEventAsTask(
-          0, Bind(&ConcurrentHelper::FromEvent, this));
-    }
-  }
-
-  int event_count() const { return event_count_; }
-  int task_count() const { return task_count_; }
-
- private:
-  friend class RefCounted<ConcurrentHelper>;
-
-  ~ConcurrentHelper() {}
-
-  static const int kStartingEventCount = 20;
-  static const int kStartingTaskCount = 20;
-
-  EventInjector* injector_;
-  int event_count_;
-  int task_count_;
-};
-
-}  // namespace
-
-TEST_F(MessagePumpGLibTest, TestConcurrentEventPostedTask) {
-  // Tests that posted tasks don't starve events, nor the opposite.
-  // We use the helper class above. We keep both event and posted task queues
-  // full, the helper verifies that both tasks and events get processed.
-  // If that is not the case, either event_count_ or task_count_ will not get
-  // to 0, and MessageLoop::QuitWhenIdle() will never be called.
-  scoped_refptr<ConcurrentHelper> helper = new ConcurrentHelper(injector());
-
-  // Add 2 events to the queue to make sure it is always full (when we remove
-  // the event before processing it).
-  injector()->AddEventAsTask(
-      0, Bind(&ConcurrentHelper::FromEvent, helper.get()));
-  injector()->AddEventAsTask(
-      0, Bind(&ConcurrentHelper::FromEvent, helper.get()));
-
-  // Similarly post 2 tasks.
-  loop()->PostTask(
-      FROM_HERE, Bind(&ConcurrentHelper::FromTask, helper.get()));
-  loop()->PostTask(
-      FROM_HERE, Bind(&ConcurrentHelper::FromTask, helper.get()));
-
-  loop()->Run();
-  EXPECT_EQ(0, helper->event_count());
-  EXPECT_EQ(0, helper->task_count());
-}
-
-namespace {
-
-void AddEventsAndDrainGLib(EventInjector* injector) {
-  // Add a couple of dummy events
-  injector->AddDummyEvent(0);
-  injector->AddDummyEvent(0);
-  // Then add an event that will quit the main loop.
-  injector->AddEvent(0, MessageLoop::QuitWhenIdleClosure());
-
-  // Post a couple of dummy tasks
-  MessageLoop::current()->PostTask(FROM_HERE, Bind(&DoNothing));
-  MessageLoop::current()->PostTask(FROM_HERE, Bind(&DoNothing));
-
-  // Drain the events
-  while (g_main_context_pending(NULL)) {
-    g_main_context_iteration(NULL, FALSE);
-  }
-}
-
-}  // namespace
-
-TEST_F(MessagePumpGLibTest, TestDrainingGLib) {
-  // Tests that draining events using GLib works.
-  loop()->PostTask(
-      FROM_HERE,
-      Bind(&AddEventsAndDrainGLib, Unretained(injector())));
-  loop()->Run();
-
-  EXPECT_EQ(3, injector()->processed_events());
-}
-
-
-namespace {
-
-#if defined(TOOLKIT_GTK)
-void AddEventsAndDrainGtk(EventInjector* injector) {
-  // Add a couple of dummy events
-  injector->AddDummyEvent(0);
-  injector->AddDummyEvent(0);
-  // Then add an event that will quit the main loop.
-  injector->AddEvent(0, MessageLoop::QuitWhenIdleClosure());
-
-  // Post a couple of dummy tasks
-  MessageLoop::current()->PostTask(FROM_HERE, Bind(&DoNothing));
-  MessageLoop::current()->PostTask(FROM_HERE, Bind(&DoNothing));
-
-  // Drain the events
-  while (gtk_events_pending()) {
-    gtk_main_iteration();
-  }
-}
-#endif
-
-}  // namespace
-
-#if defined(TOOLKIT_GTK)
-TEST_F(MessagePumpGLibTest, TestDrainingGtk) {
-  // Tests that draining events using Gtk works.
-  loop()->PostTask(
-      FROM_HERE,
-      Bind(&AddEventsAndDrainGtk, Unretained(injector())));
-  loop()->Run();
-
-  EXPECT_EQ(3, injector()->processed_events());
-}
-#endif
-
-namespace {
-
-// Helper class that lets us run the GLib message loop.
-class GLibLoopRunner : public RefCounted<GLibLoopRunner> {
- public:
-  GLibLoopRunner() : quit_(false) { }
-
-  void RunGLib() {
-    while (!quit_) {
-      g_main_context_iteration(NULL, TRUE);
-    }
-  }
-
-  void RunLoop() {
-#if defined(TOOLKIT_GTK)
-    while (!quit_) {
-      gtk_main_iteration();
-    }
-#else
-    while (!quit_) {
-      g_main_context_iteration(NULL, TRUE);
-    }
-#endif
-  }
-
-  void Quit() {
-    quit_ = true;
-  }
-
-  void Reset() {
-    quit_ = false;
-  }
-
- private:
-  friend class RefCounted<GLibLoopRunner>;
-
-  ~GLibLoopRunner() {}
-
-  bool quit_;
-};
-
-void TestGLibLoopInternal(EventInjector* injector) {
-  // Allow tasks to be processed from 'native' event loops.
-  MessageLoop::current()->SetNestableTasksAllowed(true);
-  scoped_refptr<GLibLoopRunner> runner = new GLibLoopRunner();
-
-  int task_count = 0;
-  // Add a couple of dummy events
-  injector->AddDummyEvent(0);
-  injector->AddDummyEvent(0);
-  // Post a couple of dummy tasks
-  MessageLoop::current()->PostTask(
-      FROM_HERE, Bind(&IncrementInt, &task_count));
-  MessageLoop::current()->PostTask(
-      FROM_HERE, Bind(&IncrementInt, &task_count));
-  // Delayed events
-  injector->AddDummyEvent(10);
-  injector->AddDummyEvent(10);
-  // Delayed work
-  MessageLoop::current()->PostDelayedTask(
-      FROM_HERE,
-      Bind(&IncrementInt, &task_count),
-      TimeDelta::FromMilliseconds(30));
-  MessageLoop::current()->PostDelayedTask(
-      FROM_HERE,
-      Bind(&GLibLoopRunner::Quit, runner.get()),
-      TimeDelta::FromMilliseconds(40));
-
-  // Run a nested, straight GLib message loop.
-  runner->RunGLib();
-
-  ASSERT_EQ(3, task_count);
-  EXPECT_EQ(4, injector->processed_events());
-  MessageLoop::current()->QuitWhenIdle();
-}
-
-void TestGtkLoopInternal(EventInjector* injector) {
-  // Allow tasks to be processed from 'native' event loops.
-  MessageLoop::current()->SetNestableTasksAllowed(true);
-  scoped_refptr<GLibLoopRunner> runner = new GLibLoopRunner();
-
-  int task_count = 0;
-  // Add a couple of dummy events
-  injector->AddDummyEvent(0);
-  injector->AddDummyEvent(0);
-  // Post a couple of dummy tasks
-  MessageLoop::current()->PostTask(
-      FROM_HERE, Bind(&IncrementInt, &task_count));
-  MessageLoop::current()->PostTask(
-      FROM_HERE, Bind(&IncrementInt, &task_count));
-  // Delayed events
-  injector->AddDummyEvent(10);
-  injector->AddDummyEvent(10);
-  // Delayed work
-  MessageLoop::current()->PostDelayedTask(
-      FROM_HERE,
-      Bind(&IncrementInt, &task_count),
-      TimeDelta::FromMilliseconds(30));
-  MessageLoop::current()->PostDelayedTask(
-      FROM_HERE,
-      Bind(&GLibLoopRunner::Quit, runner.get()),
-      TimeDelta::FromMilliseconds(40));
-
-  // Run a nested, straight Gtk message loop.
-  runner->RunLoop();
-
-  ASSERT_EQ(3, task_count);
-  EXPECT_EQ(4, injector->processed_events());
-  MessageLoop::current()->QuitWhenIdle();
-}
-
-}  // namespace
-
-TEST_F(MessagePumpGLibTest, TestGLibLoop) {
-  // Tests that events and posted tasks are correctly executed if the message
-  // loop is not run by MessageLoop::Run() but by a straight GLib loop.
-  // Note that in this case we don't make strong guarantees about niceness
-  // between events and posted tasks.
-  loop()->PostTask(
-      FROM_HERE,
-      Bind(&TestGLibLoopInternal, Unretained(injector())));
-  loop()->Run();
-}
-
-TEST_F(MessagePumpGLibTest, TestGtkLoop) {
-  // Tests that events and posted tasks are correctly executed if the message
-  // loop is not run by MessageLoop::Run() but by a straight Gtk loop.
-  // Note that in this case we don't make strong guarantees about niceness
-  // between events and posted tasks.
-  loop()->PostTask(
-      FROM_HERE,
-      Bind(&TestGtkLoopInternal, Unretained(injector())));
-  loop()->Run();
-}
-
-}  // namespace base