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// Copyright 2017 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/browser/browser_main_loop.h"
#include "base/command_line.h"
#include "base/message_loop/message_loop.h"
#include "base/system/sys_info.h"
#include "base/task/thread_pool/thread_pool.h"
#include "base/test/scoped_command_line.h"
#include "content/browser/browser_thread_impl.h"
#include "content/browser/scheduler/browser_task_executor.h"
#include "content/browser/startup_helper.h"
#include "content/public/browser/browser_thread.h"
#include "content/public/common/content_switches.h"
#include "content/public/common/main_function_params.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace content {
// Verify that a single-process browser process has at least as many threads as
// the number of cores in its foreground pool.
TEST(BrowserMainLoopTest, CreateThreadsInSingleProcess) {
{
base::test::ScopedCommandLine scoped_command_line;
scoped_command_line.GetProcessCommandLine()->AppendSwitch(
switches::kSingleProcess);
base::ThreadPool::Create("Browser");
StartBrowserThreadPool();
BrowserTaskExecutor::Create();
MainFunctionParams main_function_params(
*scoped_command_line.GetProcessCommandLine());
BrowserMainLoop browser_main_loop(
main_function_params,
std::make_unique<base::ThreadPool::ScopedExecutionFence>());
browser_main_loop.MainMessageLoopStart();
browser_main_loop.Init();
browser_main_loop.CreateThreads();
EXPECT_GE(base::ThreadPool::GetInstance()
->GetMaxConcurrentNonBlockedTasksWithTraitsDeprecated(
{base::TaskPriority::USER_VISIBLE}),
base::SysInfo::NumberOfProcessors() - 1);
browser_main_loop.ShutdownThreadsAndCleanUp();
}
BrowserTaskExecutor::ResetForTesting();
for (int id = BrowserThread::UI; id < BrowserThread::ID_COUNT; ++id) {
BrowserThreadImpl::ResetGlobalsForTesting(
static_cast<BrowserThread::ID>(id));
}
base::ThreadPool::GetInstance()->JoinForTesting();
base::ThreadPool::SetInstance(nullptr);
}
} // namespace content
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