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message_loop_unittest.cc
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// Copyright 2013 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 <stddef.h>
#include <stdint.h>
#include <vector>
#include "base/bind.h"
#include "base/bind_helpers.h"
#include "base/compiler_specific.h"
#include "base/logging.h"
#include "base/macros.h"
#include "base/memory/ptr_util.h"
#include "base/memory/ref_counted.h"
#include "base/message_loop/message_loop_current.h"
#include "base/message_loop/message_pump_for_io.h"
#include "base/pending_task.h"
#include "base/posix/eintr_wrapper.h"
#include "base/run_loop.h"
#include "base/single_thread_task_runner.h"
#include "base/synchronization/waitable_event.h"
#include "base/task/task_scheduler/task_scheduler.h"
#include "base/test/bind_test_util.h"
#include "base/test/gtest_util.h"
#include "base/test/metrics/histogram_tester.h"
#include "base/test/test_simple_task_runner.h"
#include "base/test/test_timeouts.h"
#include "base/threading/platform_thread.h"
#include "base/threading/sequence_local_storage_slot.h"
#include "base/threading/thread.h"
#include "base/threading/thread_task_runner_handle.h"
#include "build/build_config.h"
#include "testing/gtest/include/gtest/gtest.h"
#if defined(OS_ANDROID)
#include "base/android/java_handler_thread.h"
#include "base/android/jni_android.h"
#include "base/test/android/java_handler_thread_helpers.h"
#endif
#if defined(OS_WIN)
#include "base/message_loop/message_pump_win.h"
#include "base/process/memory.h"
#include "base/strings/string16.h"
#include "base/win/current_module.h"
#include "base/win/message_window.h"
#include "base/win/scoped_handle.h"
#endif
namespace base {
// TODO(darin): Platform-specific MessageLoop tests should be grouped together
// to avoid chopping this file up with so many #ifdefs.
namespace {
class Foo : public RefCounted<Foo> {
public:
Foo() : test_count_(0) {}
void Test0() { ++test_count_; }
void Test1ConstRef(const std::string& a) {
++test_count_;
result_.append(a);
}
void Test1Ptr(std::string* a) {
++test_count_;
result_.append(*a);
}
void Test1Int(int a) { test_count_ += a; }
void Test2Ptr(std::string* a, std::string* b) {
++test_count_;
result_.append(*a);
result_.append(*b);
}
void Test2Mixed(const std::string& a, std::string* b) {
++test_count_;
result_.append(a);
result_.append(*b);
}
int test_count() const { return test_count_; }
const std::string& result() const { return result_; }
private:
friend class RefCounted<Foo>;
~Foo() = default;
int test_count_;
std::string result_;
DISALLOW_COPY_AND_ASSIGN(Foo);
};
// This function runs slowly to simulate a large amount of work being done.
static void SlowFunc(TimeDelta pause, int* quit_counter) {
PlatformThread::Sleep(pause);
if (--(*quit_counter) == 0)
RunLoop::QuitCurrentWhenIdleDeprecated();
}
// This function records the time when Run was called in a Time object, which is
// useful for building a variety of MessageLoop tests.
static void RecordRunTimeFunc(TimeTicks* run_time, int* quit_counter) {
*run_time = TimeTicks::Now();
// Cause our Run function to take some time to execute. As a result we can
// count on subsequent RecordRunTimeFunc()s running at a future time,
// without worry about the resolution of our system clock being an issue.
SlowFunc(TimeDelta::FromMilliseconds(10), quit_counter);
}
enum TaskType {
MESSAGEBOX,
ENDDIALOG,
RECURSIVE,
TIMEDMESSAGELOOP,
QUITMESSAGELOOP,
ORDERED,
PUMPS,
SLEEP,
RUNS,
};
// Saves the order in which the tasks executed.
struct TaskItem {
TaskItem(TaskType t, int c, bool s) : type(t), cookie(c), start(s) {}
TaskType type;
int cookie;
bool start;
bool operator==(const TaskItem& other) const {
return type == other.type && cookie == other.cookie && start == other.start;
}
};
std::ostream& operator<<(std::ostream& os, TaskType type) {
switch (type) {
case MESSAGEBOX:
os << "MESSAGEBOX";
break;
case ENDDIALOG:
os << "ENDDIALOG";
break;
case RECURSIVE:
os << "RECURSIVE";
break;
case TIMEDMESSAGELOOP:
os << "TIMEDMESSAGELOOP";
break;
case QUITMESSAGELOOP:
os << "QUITMESSAGELOOP";
break;
case ORDERED:
os << "ORDERED";
break;
case PUMPS:
os << "PUMPS";
break;
case SLEEP:
os << "SLEEP";
break;
default:
NOTREACHED();
os << "Unknown TaskType";
break;
}
return os;
}
std::ostream& operator<<(std::ostream& os, const TaskItem& item) {
if (item.start)
return os << item.type << " " << item.cookie << " starts";
return os << item.type << " " << item.cookie << " ends";
}
class TaskList {
public:
void RecordStart(TaskType type, int cookie) {
TaskItem item(type, cookie, true);
DVLOG(1) << item;
task_list_.push_back(item);
}
void RecordEnd(TaskType type, int cookie) {
TaskItem item(type, cookie, false);
DVLOG(1) << item;
task_list_.push_back(item);
}
size_t Size() { return task_list_.size(); }
TaskItem Get(int n) { return task_list_[n]; }
private:
std::vector<TaskItem> task_list_;
};
class DummyTaskObserver : public MessageLoop::TaskObserver {
public:
explicit DummyTaskObserver(int num_tasks)
: num_tasks_started_(0), num_tasks_processed_(0), num_tasks_(num_tasks) {}
DummyTaskObserver(int num_tasks, int num_tasks_started)
: num_tasks_started_(num_tasks_started),
num_tasks_processed_(0),
num_tasks_(num_tasks) {}
~DummyTaskObserver() override = default;
void WillProcessTask(const PendingTask& pending_task) override {
num_tasks_started_++;
EXPECT_LE(num_tasks_started_, num_tasks_);
EXPECT_EQ(num_tasks_started_, num_tasks_processed_ + 1);
}
void DidProcessTask(const PendingTask& pending_task) override {
num_tasks_processed_++;
EXPECT_LE(num_tasks_started_, num_tasks_);
EXPECT_EQ(num_tasks_started_, num_tasks_processed_);
}
int num_tasks_started() const { return num_tasks_started_; }
int num_tasks_processed() const { return num_tasks_processed_; }
private:
int num_tasks_started_;
int num_tasks_processed_;
const int num_tasks_;
DISALLOW_COPY_AND_ASSIGN(DummyTaskObserver);
};
void RecursiveFunc(TaskList* order, int cookie, int depth, bool is_reentrant) {
order->RecordStart(RECURSIVE, cookie);
if (depth > 0) {
if (is_reentrant)
MessageLoopCurrent::Get()->SetNestableTasksAllowed(true);
ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE,
BindOnce(&RecursiveFunc, order, cookie, depth - 1, is_reentrant));
}
order->RecordEnd(RECURSIVE, cookie);
}
void QuitFunc(TaskList* order, int cookie) {
order->RecordStart(QUITMESSAGELOOP, cookie);
RunLoop::QuitCurrentWhenIdleDeprecated();
order->RecordEnd(QUITMESSAGELOOP, cookie);
}
void PostNTasks(int posts_remaining) {
if (posts_remaining > 1) {
ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, BindOnce(&PostNTasks, posts_remaining - 1));
}
}
class MessageLoopTest : public ::testing::Test {};
#if defined(OS_ANDROID)
void DoNotRun() {
ASSERT_TRUE(false);
}
void RunTest_AbortDontRunMoreTasks(bool delayed, bool init_java_first) {
WaitableEvent test_done_event(WaitableEvent::ResetPolicy::MANUAL,
WaitableEvent::InitialState::NOT_SIGNALED);
std::unique_ptr<android::JavaHandlerThread> java_thread;
if (init_java_first) {
java_thread = android::JavaHandlerThreadHelpers::CreateJavaFirst();
} else {
java_thread = std::make_unique<android::JavaHandlerThread>(
"JavaHandlerThreadForTesting from AbortDontRunMoreTasks");
}
java_thread->Start();
java_thread->ListenForUncaughtExceptionsForTesting();
auto target =
BindOnce(&android::JavaHandlerThreadHelpers::ThrowExceptionAndAbort,
&test_done_event);
if (delayed) {
java_thread->message_loop()->task_runner()->PostDelayedTask(
FROM_HERE, std::move(target), TimeDelta::FromMilliseconds(10));
} else {
java_thread->message_loop()->task_runner()->PostTask(FROM_HERE,
std::move(target));
java_thread->message_loop()->task_runner()->PostTask(FROM_HERE,
BindOnce(&DoNotRun));
}
test_done_event.Wait();
java_thread->Stop();
android::ScopedJavaLocalRef<jthrowable> exception =
java_thread->GetUncaughtExceptionIfAny();
ASSERT_TRUE(
android::JavaHandlerThreadHelpers::IsExceptionTestException(exception));
}
TEST_F(MessageLoopTest, JavaExceptionAbort) {
constexpr bool delayed = false;
constexpr bool init_java_first = false;
RunTest_AbortDontRunMoreTasks(delayed, init_java_first);
}
TEST_F(MessageLoopTest, DelayedJavaExceptionAbort) {
constexpr bool delayed = true;
constexpr bool init_java_first = false;
RunTest_AbortDontRunMoreTasks(delayed, init_java_first);
}
TEST_F(MessageLoopTest, JavaExceptionAbortInitJavaFirst) {
constexpr bool delayed = false;
constexpr bool init_java_first = true;
RunTest_AbortDontRunMoreTasks(delayed, init_java_first);
}
TEST_F(MessageLoopTest, RunTasksWhileShuttingDownJavaThread) {
const int kNumPosts = 6;
DummyTaskObserver observer(kNumPosts, 1);
auto java_thread = std::make_unique<android::JavaHandlerThread>("test");
java_thread->Start();
java_thread->message_loop()->task_runner()->PostTask(
FROM_HERE,
BindOnce(
[](android::JavaHandlerThread* java_thread,
DummyTaskObserver* observer, int num_posts) {
java_thread->message_loop()->AddTaskObserver(observer);
ThreadTaskRunnerHandle::Get()->PostDelayedTask(
FROM_HERE, BindOnce([]() { ADD_FAILURE(); }),
TimeDelta::FromDays(1));
java_thread->StopMessageLoopForTesting();
PostNTasks(num_posts);
},
Unretained(java_thread.get()), Unretained(&observer), kNumPosts));
java_thread->JoinForTesting();
java_thread.reset();
EXPECT_EQ(kNumPosts, observer.num_tasks_started());
EXPECT_EQ(kNumPosts, observer.num_tasks_processed());
}
#endif // defined(OS_ANDROID)
#if defined(OS_WIN)
void SubPumpFunc(OnceClosure on_done) {
MessageLoopCurrent::ScopedNestableTaskAllower allow_nestable_tasks;
MSG msg;
while (::GetMessage(&msg, NULL, 0, 0)) {
::TranslateMessage(&msg);
::DispatchMessage(&msg);
}
std::move(on_done).Run();
}
const wchar_t kMessageBoxTitle[] = L"MessageLoop Unit Test";
// MessageLoop implicitly start a "modal message loop". Modal dialog boxes,
// common controls (like OpenFile) and StartDoc printing function can cause
// implicit message loops.
void MessageBoxFunc(TaskList* order, int cookie, bool is_reentrant) {
order->RecordStart(MESSAGEBOX, cookie);
if (is_reentrant)
MessageLoopCurrent::Get()->SetNestableTasksAllowed(true);
MessageBox(NULL, L"Please wait...", kMessageBoxTitle, MB_OK);
order->RecordEnd(MESSAGEBOX, cookie);
}
// Will end the MessageBox.
void EndDialogFunc(TaskList* order, int cookie) {
order->RecordStart(ENDDIALOG, cookie);
HWND window = GetActiveWindow();
if (window != NULL) {
EXPECT_NE(EndDialog(window, IDCONTINUE), 0);
// Cheap way to signal that the window wasn't found if RunEnd() isn't
// called.
order->RecordEnd(ENDDIALOG, cookie);
}
}
void RecursiveFuncWin(scoped_refptr<SingleThreadTaskRunner> task_runner,
HANDLE event,
bool expect_window,
TaskList* order,
bool is_reentrant) {
task_runner->PostTask(FROM_HERE,
BindOnce(&RecursiveFunc, order, 1, 2, is_reentrant));
task_runner->PostTask(FROM_HERE,
BindOnce(&MessageBoxFunc, order, 2, is_reentrant));
task_runner->PostTask(FROM_HERE,
BindOnce(&RecursiveFunc, order, 3, 2, is_reentrant));
// The trick here is that for recursive task processing, this task will be
// ran _inside_ the MessageBox message loop, dismissing the MessageBox
// without a chance.
// For non-recursive task processing, this will be executed _after_ the
// MessageBox will have been dismissed by the code below, where
// expect_window_ is true.
task_runner->PostTask(FROM_HERE, BindOnce(&EndDialogFunc, order, 4));
task_runner->PostTask(FROM_HERE, BindOnce(&QuitFunc, order, 5));
// Enforce that every tasks are sent before starting to run the main thread
// message loop.
ASSERT_TRUE(SetEvent(event));
// Poll for the MessageBox. Don't do this at home! At the speed we do it,
// you will never realize one MessageBox was shown.
for (; expect_window;) {
HWND window = FindWindow(L"#32770", kMessageBoxTitle);
if (window) {
// Dismiss it.
for (;;) {
HWND button = FindWindowEx(window, NULL, L"Button", NULL);
if (button != NULL) {
EXPECT_EQ(0, SendMessage(button, WM_LBUTTONDOWN, 0, 0));
EXPECT_EQ(0, SendMessage(button, WM_LBUTTONUP, 0, 0));
break;
}
}
break;
}
}
}
#endif // defined(OS_WIN)
void PostNTasksThenQuit(int posts_remaining) {
if (posts_remaining > 1) {
ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, BindOnce(&PostNTasksThenQuit, posts_remaining - 1));
} else {
RunLoop::QuitCurrentWhenIdleDeprecated();
}
}
#if defined(OS_WIN)
class TestIOHandler : public MessagePumpForIO::IOHandler {
public:
TestIOHandler(const wchar_t* name, HANDLE signal, bool wait);
void OnIOCompleted(MessagePumpForIO::IOContext* context,
DWORD bytes_transfered,
DWORD error) override;
void Init();
void WaitForIO();
OVERLAPPED* context() { return &context_.overlapped; }
DWORD size() { return sizeof(buffer_); }
private:
char buffer_[48];
MessagePumpForIO::IOContext context_;
HANDLE signal_;
win::ScopedHandle file_;
bool wait_;
};
TestIOHandler::TestIOHandler(const wchar_t* name, HANDLE signal, bool wait)
: signal_(signal), wait_(wait) {
memset(buffer_, 0, sizeof(buffer_));
file_.Set(CreateFile(name, GENERIC_READ, 0, NULL, OPEN_EXISTING,
FILE_FLAG_OVERLAPPED, NULL));
EXPECT_TRUE(file_.IsValid());
}
void TestIOHandler::Init() {
MessageLoopCurrentForIO::Get()->RegisterIOHandler(file_.Get(), this);
DWORD read;
EXPECT_FALSE(ReadFile(file_.Get(), buffer_, size(), &read, context()));
EXPECT_EQ(static_cast<DWORD>(ERROR_IO_PENDING), GetLastError());
if (wait_)
WaitForIO();
}
void TestIOHandler::OnIOCompleted(MessagePumpForIO::IOContext* context,
DWORD bytes_transfered,
DWORD error) {
ASSERT_TRUE(context == &context_);
ASSERT_TRUE(SetEvent(signal_));
}
void TestIOHandler::WaitForIO() {
EXPECT_TRUE(MessageLoopCurrentForIO::Get()->WaitForIOCompletion(300, this));
EXPECT_TRUE(MessageLoopCurrentForIO::Get()->WaitForIOCompletion(400, this));
}
void RunTest_IOHandler() {
win::ScopedHandle callback_called(CreateEvent(NULL, TRUE, FALSE, NULL));
ASSERT_TRUE(callback_called.IsValid());
const wchar_t* kPipeName = L"\\\\.\\pipe\\iohandler_pipe";
win::ScopedHandle server(
CreateNamedPipe(kPipeName, PIPE_ACCESS_OUTBOUND, 0, 1, 0, 0, 0, NULL));
ASSERT_TRUE(server.IsValid());
Thread thread("IOHandler test");
Thread::Options options;
options.message_loop_type = MessageLoop::TYPE_IO;
ASSERT_TRUE(thread.StartWithOptions(options));
TestIOHandler handler(kPipeName, callback_called.Get(), false);
thread.task_runner()->PostTask(
FROM_HERE, BindOnce(&TestIOHandler::Init, Unretained(&handler)));
// Make sure the thread runs and sleeps for lack of work.
PlatformThread::Sleep(TimeDelta::FromMilliseconds(100));
const char buffer[] = "Hello there!";
DWORD written;
EXPECT_TRUE(WriteFile(server.Get(), buffer, sizeof(buffer), &written, NULL));
DWORD result = WaitForSingleObject(callback_called.Get(), 1000);
EXPECT_EQ(WAIT_OBJECT_0, result);
thread.Stop();
}
void RunTest_WaitForIO() {
win::ScopedHandle callback1_called(CreateEvent(NULL, TRUE, FALSE, NULL));
win::ScopedHandle callback2_called(CreateEvent(NULL, TRUE, FALSE, NULL));
ASSERT_TRUE(callback1_called.IsValid());
ASSERT_TRUE(callback2_called.IsValid());
const wchar_t* kPipeName1 = L"\\\\.\\pipe\\iohandler_pipe1";
const wchar_t* kPipeName2 = L"\\\\.\\pipe\\iohandler_pipe2";
win::ScopedHandle server1(
CreateNamedPipe(kPipeName1, PIPE_ACCESS_OUTBOUND, 0, 1, 0, 0, 0, NULL));
win::ScopedHandle server2(
CreateNamedPipe(kPipeName2, PIPE_ACCESS_OUTBOUND, 0, 1, 0, 0, 0, NULL));
ASSERT_TRUE(server1.IsValid());
ASSERT_TRUE(server2.IsValid());
Thread thread("IOHandler test");
Thread::Options options;
options.message_loop_type = MessageLoop::TYPE_IO;
ASSERT_TRUE(thread.StartWithOptions(options));
TestIOHandler handler1(kPipeName1, callback1_called.Get(), false);
TestIOHandler handler2(kPipeName2, callback2_called.Get(), true);
thread.task_runner()->PostTask(
FROM_HERE, BindOnce(&TestIOHandler::Init, Unretained(&handler1)));
// TODO(ajwong): Do we really need such long Sleeps in this function?
// Make sure the thread runs and sleeps for lack of work.
TimeDelta delay = TimeDelta::FromMilliseconds(100);
PlatformThread::Sleep(delay);
thread.task_runner()->PostTask(
FROM_HERE, BindOnce(&TestIOHandler::Init, Unretained(&handler2)));
PlatformThread::Sleep(delay);
// At this time handler1 is waiting to be called, and the thread is waiting
// on the Init method of handler2, filtering only handler2 callbacks.
const char buffer[] = "Hello there!";
DWORD written;
EXPECT_TRUE(WriteFile(server1.Get(), buffer, sizeof(buffer), &written, NULL));
PlatformThread::Sleep(2 * delay);
EXPECT_EQ(static_cast<DWORD>(WAIT_TIMEOUT),
WaitForSingleObject(callback1_called.Get(), 0))
<< "handler1 has not been called";
EXPECT_TRUE(WriteFile(server2.Get(), buffer, sizeof(buffer), &written, NULL));
HANDLE objects[2] = {callback1_called.Get(), callback2_called.Get()};
DWORD result = WaitForMultipleObjects(2, objects, TRUE, 1000);
EXPECT_EQ(WAIT_OBJECT_0, result);
thread.Stop();
}
#endif // defined(OS_WIN)
} // namespace
//-----------------------------------------------------------------------------
// Each test is run against each type of MessageLoop. That way we are sure
// that message loops work properly in all configurations. Of course, in some
// cases, a unit test may only be for a particular type of loop.
class MessageLoopTypedTest
: public ::testing::TestWithParam<MessageLoop::Type> {
public:
MessageLoopTypedTest() = default;
~MessageLoopTypedTest() = default;
static std::string ParamInfoToString(
::testing::TestParamInfo<MessageLoop::Type> param_info) {
switch (param_info.param) {
case MessageLoop::TYPE_DEFAULT:
return "default_pump";
case MessageLoop::TYPE_IO:
return "IO_pump";
case MessageLoop::TYPE_UI:
return "UI_pump";
case MessageLoop::TYPE_CUSTOM:
#if defined(OS_ANDROID)
case MessageLoop::TYPE_JAVA:
#endif // defined(OS_ANDROID)
break;
}
NOTREACHED();
return "";
}
std::unique_ptr<MessageLoop> CreateMessageLoop() {
auto message_loop = base::WrapUnique(new MessageLoop(GetParam(), nullptr));
message_loop->BindToCurrentThread();
return message_loop;
}
private:
DISALLOW_COPY_AND_ASSIGN(MessageLoopTypedTest);
};
TEST_P(MessageLoopTypedTest, PostTask) {
auto loop = CreateMessageLoop();
// Add tests to message loop
scoped_refptr<Foo> foo(new Foo());
std::string a("a"), b("b"), c("c"), d("d");
ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
BindOnce(&Foo::Test0, foo));
ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, BindOnce(&Foo::Test1ConstRef, foo, a));
ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
BindOnce(&Foo::Test1Ptr, foo, &b));
ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
BindOnce(&Foo::Test1Int, foo, 100));
ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, BindOnce(&Foo::Test2Ptr, foo, &a, &c));
ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, BindOnce(&Foo::Test2Mixed, foo, a, &d));
// After all tests, post a message that will shut down the message loop
ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, BindOnce(&RunLoop::QuitCurrentWhenIdleDeprecated));
// Now kick things off
RunLoop().Run();
EXPECT_EQ(foo->test_count(), 105);
EXPECT_EQ(foo->result(), "abacad");
}
TEST_P(MessageLoopTypedTest, PostDelayedTask_Basic) {
auto loop = CreateMessageLoop();
// Test that PostDelayedTask results in a delayed task.
const TimeDelta kDelay = TimeDelta::FromMilliseconds(100);
int num_tasks = 1;
TimeTicks run_time;
TimeTicks time_before_run = TimeTicks::Now();
loop->task_runner()->PostDelayedTask(
FROM_HERE, BindOnce(&RecordRunTimeFunc, &run_time, &num_tasks), kDelay);
RunLoop().Run();
TimeTicks time_after_run = TimeTicks::Now();
EXPECT_EQ(0, num_tasks);
EXPECT_LT(kDelay, time_after_run - time_before_run);
}
TEST_P(MessageLoopTypedTest, PostDelayedTask_InDelayOrder) {
auto loop = CreateMessageLoop();
// Test that two tasks with different delays run in the right order.
int num_tasks = 2;
TimeTicks run_time1, run_time2;
loop->task_runner()->PostDelayedTask(
FROM_HERE, BindOnce(&RecordRunTimeFunc, &run_time1, &num_tasks),
TimeDelta::FromMilliseconds(200));
// If we get a large pause in execution (due to a context switch) here, this
// test could fail.
loop->task_runner()->PostDelayedTask(
FROM_HERE, BindOnce(&RecordRunTimeFunc, &run_time2, &num_tasks),
TimeDelta::FromMilliseconds(10));
RunLoop().Run();
EXPECT_EQ(0, num_tasks);
EXPECT_TRUE(run_time2 < run_time1);
}
TEST_P(MessageLoopTypedTest, PostDelayedTask_InPostOrder) {
auto loop = CreateMessageLoop();
// Test that two tasks with the same delay run in the order in which they
// were posted.
//
// NOTE: This is actually an approximate test since the API only takes a
// "delay" parameter, so we are not exactly simulating two tasks that get
// posted at the exact same time. It would be nice if the API allowed us to
// specify the desired run time.
const TimeDelta kDelay = TimeDelta::FromMilliseconds(100);
int num_tasks = 2;
TimeTicks run_time1, run_time2;
loop->task_runner()->PostDelayedTask(
FROM_HERE, BindOnce(&RecordRunTimeFunc, &run_time1, &num_tasks), kDelay);
loop->task_runner()->PostDelayedTask(
FROM_HERE, BindOnce(&RecordRunTimeFunc, &run_time2, &num_tasks), kDelay);
RunLoop().Run();
EXPECT_EQ(0, num_tasks);
EXPECT_TRUE(run_time1 < run_time2);
}
TEST_P(MessageLoopTypedTest, PostDelayedTask_InPostOrder_2) {
auto loop = CreateMessageLoop();
// Test that a delayed task still runs after a normal tasks even if the
// normal tasks take a long time to run.
const TimeDelta kPause = TimeDelta::FromMilliseconds(50);
int num_tasks = 2;
TimeTicks run_time;
loop->task_runner()->PostTask(FROM_HERE,
BindOnce(&SlowFunc, kPause, &num_tasks));
loop->task_runner()->PostDelayedTask(
FROM_HERE, BindOnce(&RecordRunTimeFunc, &run_time, &num_tasks),
TimeDelta::FromMilliseconds(10));
TimeTicks time_before_run = TimeTicks::Now();
RunLoop().Run();
TimeTicks time_after_run = TimeTicks::Now();
EXPECT_EQ(0, num_tasks);
EXPECT_LT(kPause, time_after_run - time_before_run);
}
TEST_P(MessageLoopTypedTest, PostDelayedTask_InPostOrder_3) {
auto loop = CreateMessageLoop();
// Test that a delayed task still runs after a pile of normal tasks. The key
// difference between this test and the previous one is that here we return
// the MessageLoop a lot so we give the MessageLoop plenty of opportunities
// to maybe run the delayed task. It should know not to do so until the
// delayed task's delay has passed.
int num_tasks = 11;
TimeTicks run_time1, run_time2;
// Clutter the ML with tasks.
for (int i = 1; i < num_tasks; ++i)
loop->task_runner()->PostTask(
FROM_HERE, BindOnce(&RecordRunTimeFunc, &run_time1, &num_tasks));
loop->task_runner()->PostDelayedTask(
FROM_HERE, BindOnce(&RecordRunTimeFunc, &run_time2, &num_tasks),
TimeDelta::FromMilliseconds(1));
RunLoop().Run();
EXPECT_EQ(0, num_tasks);
EXPECT_TRUE(run_time2 > run_time1);
}
TEST_P(MessageLoopTypedTest, PostDelayedTask_SharedTimer) {
auto loop = CreateMessageLoop();
// Test that the interval of the timer, used to run the next delayed task, is
// set to a value corresponding to when the next delayed task should run.
// By setting num_tasks to 1, we ensure that the first task to run causes the
// run loop to exit.
int num_tasks = 1;
TimeTicks run_time1, run_time2;
loop->task_runner()->PostDelayedTask(
FROM_HERE, BindOnce(&RecordRunTimeFunc, &run_time1, &num_tasks),
TimeDelta::FromSeconds(1000));
loop->task_runner()->PostDelayedTask(
FROM_HERE, BindOnce(&RecordRunTimeFunc, &run_time2, &num_tasks),
TimeDelta::FromMilliseconds(10));
TimeTicks start_time = TimeTicks::Now();
RunLoop().Run();
EXPECT_EQ(0, num_tasks);
// Ensure that we ran in far less time than the slower timer.
TimeDelta total_time = TimeTicks::Now() - start_time;
EXPECT_GT(5000, total_time.InMilliseconds());
// In case both timers somehow run at nearly the same time, sleep a little
// and then run all pending to force them both to have run. This is just
// encouraging flakiness if there is any.
PlatformThread::Sleep(TimeDelta::FromMilliseconds(100));
RunLoop().RunUntilIdle();
EXPECT_TRUE(run_time1.is_null());
EXPECT_FALSE(run_time2.is_null());
}
namespace {
// This is used to inject a test point for recording the destructor calls for
// Closure objects send to MessageLoop::PostTask(). It is awkward usage since we
// are trying to hook the actual destruction, which is not a common operation.
class RecordDeletionProbe : public RefCounted<RecordDeletionProbe> {
public:
RecordDeletionProbe(RecordDeletionProbe* post_on_delete, bool* was_deleted)
: post_on_delete_(post_on_delete), was_deleted_(was_deleted) {}
void Run() {}
private:
friend class RefCounted<RecordDeletionProbe>;
~RecordDeletionProbe() {
*was_deleted_ = true;
if (post_on_delete_.get())
ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, BindOnce(&RecordDeletionProbe::Run, post_on_delete_));
}
scoped_refptr<RecordDeletionProbe> post_on_delete_;
bool* was_deleted_;
};
} // namespace
/* TODO(darin): MessageLoop does not support deleting all tasks in the */
/* destructor. */
/* Fails, http://crbug.com/50272. */
TEST_P(MessageLoopTypedTest, DISABLED_EnsureDeletion) {
bool a_was_deleted = false;
bool b_was_deleted = false;
{
auto loop = CreateMessageLoop();
loop->task_runner()->PostTask(
FROM_HERE, BindOnce(&RecordDeletionProbe::Run,
new RecordDeletionProbe(nullptr, &a_was_deleted)));
// TODO(ajwong): Do we really need 1000ms here?
loop->task_runner()->PostDelayedTask(
FROM_HERE,
BindOnce(&RecordDeletionProbe::Run,
new RecordDeletionProbe(nullptr, &b_was_deleted)),
TimeDelta::FromMilliseconds(1000));
}
EXPECT_TRUE(a_was_deleted);
EXPECT_TRUE(b_was_deleted);
}
/* TODO(darin): MessageLoop does not support deleting all tasks in the */
/* destructor. */
/* Fails, http://crbug.com/50272. */
TEST_P(MessageLoopTypedTest, DISABLED_EnsureDeletion_Chain) {
bool a_was_deleted = false;
bool b_was_deleted = false;
bool c_was_deleted = false;
{
auto loop = CreateMessageLoop();
// The scoped_refptr for each of the below is held either by the chained
// RecordDeletionProbe, or the bound RecordDeletionProbe::Run() callback.
RecordDeletionProbe* a = new RecordDeletionProbe(nullptr, &a_was_deleted);
RecordDeletionProbe* b = new RecordDeletionProbe(a, &b_was_deleted);
RecordDeletionProbe* c = new RecordDeletionProbe(b, &c_was_deleted);
loop->task_runner()->PostTask(FROM_HERE,
BindOnce(&RecordDeletionProbe::Run, c));
}
EXPECT_TRUE(a_was_deleted);
EXPECT_TRUE(b_was_deleted);
EXPECT_TRUE(c_was_deleted);
}
namespace {
void NestingFunc(int* depth) {
if (*depth > 0) {
*depth -= 1;
ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
BindOnce(&NestingFunc, depth));
MessageLoopCurrent::Get()->SetNestableTasksAllowed(true);
RunLoop().Run();
}
base::RunLoop::QuitCurrentWhenIdleDeprecated();
}
} // namespace
TEST_P(MessageLoopTypedTest, Nesting) {
auto loop = CreateMessageLoop();
int depth = 50;
ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
BindOnce(&NestingFunc, &depth));
RunLoop().Run();
EXPECT_EQ(depth, 0);
}
TEST_P(MessageLoopTypedTest, RecursiveDenial1) {
auto loop = CreateMessageLoop();
EXPECT_TRUE(MessageLoopCurrent::Get()->NestableTasksAllowed());
TaskList order;
ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, BindOnce(&RecursiveFunc, &order, 1, 2, false));
ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, BindOnce(&RecursiveFunc, &order, 2, 2, false));
ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
BindOnce(&QuitFunc, &order, 3));
RunLoop().Run();
// FIFO order.
ASSERT_EQ(14U, order.Size());
EXPECT_EQ(order.Get(0), TaskItem(RECURSIVE, 1, true));
EXPECT_EQ(order.Get(1), TaskItem(RECURSIVE, 1, false));
EXPECT_EQ(order.Get(2), TaskItem(RECURSIVE, 2, true));
EXPECT_EQ(order.Get(3), TaskItem(RECURSIVE, 2, false));
EXPECT_EQ(order.Get(4), TaskItem(QUITMESSAGELOOP, 3, true));
EXPECT_EQ(order.Get(5), TaskItem(QUITMESSAGELOOP, 3, false));
EXPECT_EQ(order.Get(6), TaskItem(RECURSIVE, 1, true));
EXPECT_EQ(order.Get(7), TaskItem(RECURSIVE, 1, false));
EXPECT_EQ(order.Get(8), TaskItem(RECURSIVE, 2, true));
EXPECT_EQ(order.Get(9), TaskItem(RECURSIVE, 2, false));
EXPECT_EQ(order.Get(10), TaskItem(RECURSIVE, 1, true));
EXPECT_EQ(order.Get(11), TaskItem(RECURSIVE, 1, false));
EXPECT_EQ(order.Get(12), TaskItem(RECURSIVE, 2, true));
EXPECT_EQ(order.Get(13), TaskItem(RECURSIVE, 2, false));
}
namespace {
void OrderedFunc(TaskList* order, int cookie) {
order->RecordStart(ORDERED, cookie);
order->RecordEnd(ORDERED, cookie);
}
} // namespace
TEST_P(MessageLoopTypedTest, RecursiveSupport1) {
auto loop = CreateMessageLoop();
TaskList order;
ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, BindOnce(&RecursiveFunc, &order, 1, 2, true));
ThreadTaskRunnerHandle::Get()->PostTask(
FROM_HERE, BindOnce(&RecursiveFunc, &order, 2, 2, true));
ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
BindOnce(&QuitFunc, &order, 3));
RunLoop().Run();
// FIFO order.
ASSERT_EQ(14U, order.Size());
EXPECT_EQ(order.Get(0), TaskItem(RECURSIVE, 1, true));
EXPECT_EQ(order.Get(1), TaskItem(RECURSIVE, 1, false));
EXPECT_EQ(order.Get(2), TaskItem(RECURSIVE, 2, true));
EXPECT_EQ(order.Get(3), TaskItem(RECURSIVE, 2, false));
EXPECT_EQ(order.Get(4), TaskItem(QUITMESSAGELOOP, 3, true));
EXPECT_EQ(order.Get(5), TaskItem(QUITMESSAGELOOP, 3, false));
EXPECT_EQ(order.Get(6), TaskItem(RECURSIVE, 1, true));
EXPECT_EQ(order.Get(7), TaskItem(RECURSIVE, 1, false));
EXPECT_EQ(order.Get(8), TaskItem(RECURSIVE, 2, true));
EXPECT_EQ(order.Get(9), TaskItem(RECURSIVE, 2, false));
EXPECT_EQ(order.Get(10), TaskItem(RECURSIVE, 1, true));
EXPECT_EQ(order.Get(11), TaskItem(RECURSIVE, 1, false));
EXPECT_EQ(order.Get(12), TaskItem(RECURSIVE, 2, true));
EXPECT_EQ(order.Get(13), TaskItem(RECURSIVE, 2, false));
}
// Tests that non nestable tasks run in FIFO if there are no nested loops.
TEST_P(MessageLoopTypedTest, NonNestableWithNoNesting) {
auto loop = CreateMessageLoop();
TaskList order;
ThreadTaskRunnerHandle::Get()->PostNonNestableTask(
FROM_HERE, BindOnce(&OrderedFunc, &order, 1));
ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
BindOnce(&OrderedFunc, &order, 2));
ThreadTaskRunnerHandle::Get()->PostTask(FROM_HERE,
BindOnce(&QuitFunc, &order, 3));
RunLoop().Run();
// FIFO order.
ASSERT_EQ(6U, order.Size());
EXPECT_EQ(order.Get(0), TaskItem(ORDERED, 1, true));
EXPECT_EQ(order.Get(1), TaskItem(ORDERED, 1, false));
EXPECT_EQ(order.Get(2), TaskItem(ORDERED, 2, true));
EXPECT_EQ(order.Get(3), TaskItem(ORDERED, 2, false));
EXPECT_EQ(order.Get(4), TaskItem(QUITMESSAGELOOP, 3, true));