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// 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 "content/public/test/test_utils.h"
#include "base/bind.h"
#include "base/lazy_instance.h"
#include "base/message_loop.h"
#include "base/run_loop.h"
#include "base/utf_string_conversions.h"
#include "base/values.h"
#include "content/public/browser/notification_service.h"
#include "content/public/browser/render_view_host.h"
#include "content/public/test/test_launcher.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace content {
namespace {
base::LazyInstance<std::vector<RunMessageLoopHook> >::Leaky
g_pre_run_message_loop_hooks = LAZY_INSTANCE_INITIALIZER;
base::LazyInstance<std::vector<RunMessageLoopHook> >::Leaky
g_post_run_message_loop_hooks = LAZY_INSTANCE_INITIALIZER;
// Number of times to repost a Quit task so that the MessageLoop finishes up
// pending tasks and tasks posted by those pending tasks without risking the
// potential hang behavior of MessageLoop::QuitWhenIdle.
// The criteria for choosing this number: it should be high enough to make the
// quit act like QuitWhenIdle, while taking into account that any page which is
// animating may be rendering another frame for each quit deferral. For an
// animating page, the potential delay to quitting the RunLoop would be
// kNumQuitDeferrals * frame_render_time. Some perf tests run slow, such as
// 200ms/frame.
static const int kNumQuitDeferrals = 10;
static void DeferredQuitRunLoop(const base::Closure& quit_task,
int num_quit_deferrals) {
if (num_quit_deferrals <= 0) {
quit_task.Run();
} else {
base::MessageLoop::current()->PostTask(
FROM_HERE,
base::Bind(&DeferredQuitRunLoop, quit_task, num_quit_deferrals - 1));
}
}
void RunAllPendingMessageAndSendQuit(BrowserThread::ID thread_id,
const base::Closure& quit_task) {
RunAllPendingInMessageLoop();
BrowserThread::PostTask(thread_id, FROM_HERE, quit_task);
}
// Class used handle result callbacks for ExecuteScriptAndGetValue.
class ScriptCallback {
public:
ScriptCallback() { }
virtual ~ScriptCallback() { }
void ResultCallback(const base::Value* result);
scoped_ptr<base::Value> result() { return result_.Pass(); }
private:
scoped_ptr<base::Value> result_;
DISALLOW_COPY_AND_ASSIGN(ScriptCallback);
};
void ScriptCallback::ResultCallback(const base::Value* result) {
if (result)
result_.reset(result->DeepCopy());
base::MessageLoop::current()->Quit();
}
} // namespace
void RunMessageLoop() {
base::RunLoop run_loop;
RunThisRunLoop(&run_loop);
}
void RunThisRunLoop(base::RunLoop* run_loop) {
base::MessageLoop::ScopedNestableTaskAllower allow(
base::MessageLoop::current());
for (size_t i = 0; i < g_pre_run_message_loop_hooks.Get().size(); i++)
g_pre_run_message_loop_hooks.Get()[i].Run(run_loop);
run_loop->Run();
for (size_t i = 0; i < g_pre_run_message_loop_hooks.Get().size(); i++)
g_post_run_message_loop_hooks.Get()[i].Run(run_loop);
}
void AddPreRunMessageLoopHook(const RunMessageLoopHook& hook) {
g_pre_run_message_loop_hooks.Get().push_back(hook);
}
void AddPostRunMessageLoopHook(const RunMessageLoopHook& hook) {
g_post_run_message_loop_hooks.Get().push_back(hook);
}
void RunAllPendingInMessageLoop() {
base::MessageLoop::current()->PostTask(
FROM_HERE, base::MessageLoop::QuitWhenIdleClosure());
RunMessageLoop();
}
void RunAllPendingInMessageLoop(BrowserThread::ID thread_id) {
if (BrowserThread::CurrentlyOn(thread_id)) {
RunAllPendingInMessageLoop();
return;
}
BrowserThread::ID current_thread_id;
if (!BrowserThread::GetCurrentThreadIdentifier(¤t_thread_id)) {
NOTREACHED();
return;
}
base::RunLoop run_loop;
BrowserThread::PostTask(thread_id, FROM_HERE,
base::Bind(&RunAllPendingMessageAndSendQuit, current_thread_id,
run_loop.QuitClosure()));
RunThisRunLoop(&run_loop);
}
base::Closure GetQuitTaskForRunLoop(base::RunLoop* run_loop) {
return base::Bind(&DeferredQuitRunLoop, run_loop->QuitClosure(),
kNumQuitDeferrals);
}
scoped_ptr<base::Value> ExecuteScriptAndGetValue(
RenderViewHost* render_view_host,
const std::string& script) {
ScriptCallback observer;
render_view_host->ExecuteJavascriptInWebFrameCallbackResult(
string16(), // frame_xpath,
UTF8ToUTF16(script),
base::Bind(&ScriptCallback::ResultCallback, base::Unretained(&observer)));
base::MessageLoop* loop = base::MessageLoop::current();
loop->Run();
return observer.result().Pass();
}
MessageLoopRunner::MessageLoopRunner()
: loop_running_(false),
quit_closure_called_(false) {
}
MessageLoopRunner::~MessageLoopRunner() {
}
void MessageLoopRunner::Run() {
// Do not run the message loop if our quit closure has already been called.
// This helps in scenarios where the closure has a chance to run before
// we Run explicitly.
if (quit_closure_called_)
return;
loop_running_ = true;
RunThisRunLoop(&run_loop_);
}
base::Closure MessageLoopRunner::QuitClosure() {
return base::Bind(&MessageLoopRunner::Quit, this);
}
void MessageLoopRunner::Quit() {
quit_closure_called_ = true;
// Only run the quit task if we are running the message loop.
if (loop_running_) {
GetQuitTaskForRunLoop(&run_loop_).Run();
loop_running_ = false;
}
}
WindowedNotificationObserver::WindowedNotificationObserver(
int notification_type,
const NotificationSource& source)
: seen_(false),
running_(false),
source_(NotificationService::AllSources()) {
registrar_.Add(this, notification_type, source);
}
WindowedNotificationObserver::~WindowedNotificationObserver() {}
void WindowedNotificationObserver::Wait() {
if (seen_)
return;
running_ = true;
message_loop_runner_ = new MessageLoopRunner;
message_loop_runner_->Run();
EXPECT_TRUE(seen_);
}
void WindowedNotificationObserver::Observe(
int type,
const NotificationSource& source,
const NotificationDetails& details) {
source_ = source;
details_ = details;
seen_ = true;
if (!running_)
return;
message_loop_runner_->Quit();
running_ = false;
}
} // namespace content
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